Smithsonian / USGS Weekly Volcanic Activity Report

The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday and averaging 16 reported volcanoes, this is not a comprehensive list of all eruptions this week, but rather a summary of activity that meet criteria discussed in the "Criteria and Disclaimers" section below.

Volcanic activity reported here is preliminary and subject to change. Carefully reviewed, detailed narratives over longer time periods are published as reports of the Bulletin of the Global Volcanism Network available through volcano profile pages.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 10 August-16 August 2022
Name	Location	Eruption Start Date	Report Status
Fagradalsfjall	Iceland	—	New
Ta'u	American Samoa (SW Pacific)	—	New
Aira	Kyushu (Japan)	2017 Mar 25	Continuing
Ebeko	Paramushir Island (Russia)	2022 Jun 11	Continuing
Great Sitkin	Andreanof Islands (USA)	2021 May 25	Continuing
Ibu	Halmahera	2008 Apr 5	Continuing
Kadovar	Northeast of New Guinea	—	Continuing
Karymsky	Eastern Kamchatka (Russia)	—	Continuing
Kilauea	Hawaiian Islands (USA)	—	Continuing
Krakatau	Sunda Strait	—	Continuing
Merapi	Central Java	2020 Dec 31	Continuing
Pavlof	Alaska Peninsula, Alaska	—	Continuing
Popocatepetl	Mexico	2005 Jan 9	Continuing
Sangay	Ecuador	2019 Mar 26	Continuing
Semeru	Eastern Java	2017 Jun 6	Continuing
Sheveluch	Central Kamchatka (Russia)	1999 Aug 15	Continuing
Suwanosejima	Ryukyu Islands (Japan)	2004 Oct 23	Continuing
Taal	Luzon (Philippines)	2024 Apr 12	Continuing

All times are local unless otherwise stated.

Fagradalsfjall | 10 August-16 August 2022 | New Activity / Unrest Cite this Report

Fagradalsfjall
Iceland

The fissure eruption in the Krýsuvík-Trölladyngja volcanic system that began on 3 August continued in the Meradalir valley during 10-16 August. Lava erupted mainly from a central cone and flowed ESE. According to the Institute of Earth Sciences the effusion rate had notably decreased, from an average of 11 cubic meters per second during 4-13 August to 3-4 cubic meters per second during 13-15 August. A news article stated that the effusion rate significantly decreased during 0530-0630 on 13 August based on information from IMO staff who were investigating the eruption site for new changes. The Institute of Earth Sciences estimated that 10.6 million cubic meters of lava had covered an area of 1.25 square kilometers by 15 August. Data collected during an overflight on 16 August indicated that the effusion rate had further reduced to 2 cubic meters per second during the previous day, though the uncertainty in that estimate was high. On 16 August residents reported seeing a purple-tinged sulfur dioxide gas cloud over the eruption area slowly drifting SW during sunrise.

Sources: Icelandic Meteorological Office (IMO), Institute of Earth Sciences, Icelandic National Broadcasting Service (RUV), Icelandic National Broadcasting Service (RUV)

Ta'u | 10 August-16 August 2022 | New Activity / Unrest Cite this Report

Ta'u
American Samoa (SW Pacific)

HVO reported that earthquakes were felt by residents of the Manu'a group of islands in American Samoa beginning on 26 July. Residents of Ofu and Olosega islands began reporting earthquakes on 10 August. Experts from HVO, Pago Pago National Weather Service Office (NWS), National Oceanic and Atmospheric Administration (NOAA) Pacific Tsunami Warning Center, NOAA-IOC (NOAA-Intergovernmental Oceanographic Commission), International Tsunami Information Center, and USGS National Earthquake Information Center have been working together to respond to the unrest. USGS scientists arrived on the islands and installed two microseismometers, one in Fiti'uta village on Ta'u island on 13 August and the other in Olosega village on 14 August. The instruments began recording about 20 earthquakes per hour. The largest earthquakes, including the felt events, were estimated to be between magnitudes 2 and 3; most of the events were too small to be felt. The exact location and depth of these earthquakes was unknown, due to limited earthquake monitoring equipment, though the data suggested that the events were beneath the Manu'a Islands, likely closer to Ta'u island rather than Ofu-Olosega, and were probably not related to the recently active Vailulu'u seamount. HVO noted that American Samoa’s volcanoes were monitored remotely by satellites and a distant seismic station in Apia, Samoa; the lack of ground-based monitoring stations does not allow for advanced warning of new activity. Both the Volcano Alert Level and Aviation Color Code were categorized as Unassigned due to the lack of a volcano-monitoring network.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Aira | 10 August-16 August 2022 | Continuing ActivityCite this Report

Aira
Kyushu (Japan)

JMA reported that nighttime incandescence at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible during 8-15 August. The seismic network recorded 33 eruptive events and 12 explosions. Volcanic plumes rose as high as 2.5 km above the crater rim and material was ejected large ballistics as high as 1.7 km above the summit. The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from the crater.

Source: Japan Meteorological Agency (JMA)

Ebeko | 10 August-16 August 2022 | Continuing ActivityCite this Report

Ebeko
Paramushir Island (Russia)

KVERT reported that moderate activity at Ebeko was ongoing. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions generated ash plumes that rose up to 3.5 km (11,500 ft) a.s.l. and drifted in multiple directions during 4-5 and 7-8 August. A thermal anomaly over the volcano was identified in satellite images during those same days. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Great Sitkin | 10 August-16 August 2022 | Continuing ActivityCite this Report

Great Sitkin
Andreanof Islands (USA)

AVO reported that slow lava effusion at Great Sitkin continued during 9-16 August; no changes to the flow margins were visible but the lava had deepened around the vent. Weather clouds often obscured satellite and webcam views during most of the week. Seismicity was low and occasional local earthquakes were recorded. Elevated surface temperatures were identified in satellite images on most days. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Ibu | 10 August-16 August 2022 | Continuing ActivityCite this Report

Ibu
Halmahera

PVMBG reported that the eruption at Ibu continued during 9-16 August. Gray-and-white ash plumes of variable densities generally rose as high as 1.5 km above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Kadovar | 10 August-16 August 2022 | Continuing ActivityCite this Report

Kadovar
Northeast of New Guinea

Based on satellite and wind model data, the Darwin VAAC reported that on 14 August an ash plume from Kadovar rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Karymsky | 10 August-16 August 2022 | Continuing ActivityCite this Report

Karymsky
Eastern Kamchatka (Russia)

KVERT reported that the eruption at Karymsky continued during 4-11 August. A daily thermal anomaly over the volcano was identified in satellite images. Explosions during 5-9 August produced ash plumes that rose as high as 5 km (16,400 ft) a.s.l. and drifted 550 km in multiple directions. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Kilauea | 10 August-16 August 2022 | Continuing ActivityCite this Report

Kilauea
Hawaiian Islands (USA)

HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea’s Halema`uma`u Crater during 9-16 August, entering the lava lake and flowing onto the crater floor. Part of the lake was continuously active. The lake level mostly remained within the bounding levees, though daily breakouts were visible along the margins. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Krakatau | 10 August-16 August 2022 | Continuing ActivityCite this Report

Krakatau
Sunda Strait

PVMBG reported that cloudy weather often prevented visual confirmation of the ongoing eruption at Anak Krakatau during 9-16 August. Incandescence at or near the vent was seen in nighttime photos on most days. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay at least 5 km away from the crater.

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Merapi | 10 August-16 August 2022 | Continuing ActivityCite this Report

Merapi
Central Java

BPPTKG reported that the eruption at Merapi continued during 5-11 August and seismicity remained at high levels. As many as 43 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 1.5 km. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 3-7 km away from the summit based on location.

Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)

Pavlof | 10 August-16 August 2022 | Continuing ActivityCite this Report

Pavlof
Alaska Peninsula, Alaska

AVO reported that a minor eruption at a vent on Pavlof’s upper E flank was ongoing during 9-16 August, though cloud cover often prevented visual confirmation. Seismic tremor persisted and multiple small daily explosions were detected in local and regional seismic and infrasound data. The explosions may have produced minor ash emissions that rose no higher than 3 km (10,000 ft) a.s.l. and dissipated quickly, though on a few of the clear views none were seen. Elevated surface temperatures were identified in satellite images on most of the days. The Volcano Alert Level remained at Watch and the Aviation Color Code remained at Orange.

Source: US Geological Survey Alaska Volcano Observatory (AVO)

Popocatepetl | 10 August-16 August 2022 | Continuing ActivityCite this Report

Popocatepetl
Mexico

CENAPRED reported that there were 19-204 steam-and-gas emissions, sometimes containing minor amounts of ash, rising from Popocatépetl each day during 9-16 August. A minor explosion was recorded at 0839 on 10 August and a moderate explosion was detected at 1528 on 11 August. Minor ashfall was reported in the municipality of Ecatzingo, State of Mexico. An explosion at 1952 on 13 August was followed at 2125 by minor amounts of ashfall in Tetela del Volcán. The Alert Level remained at Yellow, Phase Two (the middle level on a three-color scale).

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Sangay | 10 August-16 August 2022 | Continuing ActivityCite this Report

Sangay
Ecuador

IG reported that a notable increase in seismicity at Sangay began at around 1000 on 12 August and was followed by the effusion of a lava flow that descended more than 1 km on the SE flank. Strombolian activity was visible at the summit. Ash plumes rose as high as 3.5 km above the summit and drifted 500 km W and SW, past the coastline, and caused daily ashfall in the provinces of Chimborazo and Guayas during 12-16 August. The Guayaquil International Airport canceled several commercial flights on 13 August due to the presence of ash in the atmosphere. Seismicity decreased to previous levels by 16 August.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Semeru | 10 August-16 August 2022 | Continuing ActivityCite this Report

Semeru
Eastern Java

The eruption at Semeru continued during 10-16 August. The Darwin VAAC reported that during 13-16 August ash plumes rose to altitudes of 4.3-4.6 km (14,000-15,000 ft) a.s.l. and drifted SW and W based on satellite images and wind models. The Alert Level remained at 3 (on a scale of 1-4). The public was warned to stay at least 5 km away from the summit, and 500 m from Kobokan drainages within 17 km of the summit, along with other drainages originating on Semeru, including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Sheveluch | 10 August-16 August 2022 | Continuing ActivityCite this Report

Sheveluch
Central Kamchatka (Russia)

KVERT reported that the ongoing eruption at Sheveluch was characterized by explosions, hot avalanches, and lava-dome extrusion during 4-11 August. A daily thermal anomaly was identified in satellite images, and gas-and-steam plumes containing some ash were visible drifting 70 km E and SE during 8-9 August. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Suwanosejima | 10 August-16 August 2022 | Continuing ActivityCite this Report

Suwanosejima
Ryukyu Islands (Japan)

JMA reported that the number of daily explosions at Suwanosejima's Ontake Crater began increasing on 2 August and remained elevated through 7 August; their frequency began decreasing on 8 August. About 11 explosions were recorded during 8-15 August. Eruption plumes rose as high as 2 km above the crater rim and large ballistics were ejected as far as 800 m from the crater. Incandescence from the crater was often visible at night. The Alert Level remained at 2 and the public was warned to stay 1 km away from the crater.

Source: Japan Meteorological Agency (JMA)

Taal | 10 August-16 August 2022 | Continuing ActivityCite this Report

Taal
Luzon (Philippines)

PHIVOLCS reported that sulfur dioxide emissions at Taal averaged 3,802-6,844 tonnes per day during 9-10 and 12-15 August; a high of 13,572 tonnes per day was recorded on 11 August causing significant vog around the caldera and a sulfur odor reported by residents of Banyaga, (Agoncillo), Poblacion 5, Boso-boso, and Gulod (Laurel), and Poblacion (Talisay). Upwelling volcanic gasses and fluids in the lake were visible, along with voluminous steam-rich plumes that rose as high as 3 km above the lake and drifted mainly NE, SE, and SW. The Alert Level remained at 1 (on a scale of 0-5), and PHIVOLCS reminded the public that the entire Taal Volcano Island was a Permanent Danger Zone (PDZ).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)

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Criteria & Disclaimers

Criteria

The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

Disclaimers

1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are cover longer time periods and are more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

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Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)

Report for Fagradalsfjall
The fissure eruption in the Krýsuvík-Trölladyngja volcanic system that began on 3 August continued in the Meradalir valley during 10-16 August. Lava erupted mainly from a central cone and flowed ESE. According to the Institute of Earth Sciences the effusion rate had notably decreased, from an average of 11 cubic meters per second during 4-13 August to 3-4 cubic meters per second during 13-15 August. A news article stated that the effusion rate significantly decreased during 0530-0630 on 13 August based on information from IMO staff who were investigating the eruption site for new changes. The Institute of Earth Sciences estimated that 10.6 million cubic meters of lava had covered an area of 1.25 square kilometers by 15 August. Data collected during an overflight on 16 August indicated that the effusion rate had further reduced to 2 cubic meters per second during the previous day, though the uncertainty in that estimate was high. On 16 August residents reported seeing a purple-tinged sulfur dioxide gas cloud over the eruption area slowly drifting SW during sunrise.
Sources: Icelandic Meteorological Office (IMO), Institute of Earth Sciences, Icelandic National Broadcasting Service (RUV), Icelandic National Broadcasting Service (RUV)

Report for Ta'u
HVO reported that earthquakes were felt by residents of the Manu'a group of islands in American Samoa beginning on 26 July. Residents of Ofu and Olosega islands began reporting earthquakes on 10 August. Experts from HVO, Pago Pago National Weather Service Office (NWS), National Oceanic and Atmospheric Administration (NOAA) Pacific Tsunami Warning Center, NOAA-IOC (NOAA-Intergovernmental Oceanographic Commission), International Tsunami Information Center, and USGS National Earthquake Information Center have been working together to respond to the unrest. USGS scientists arrived on the islands and installed two microseismometers, one in Fiti'uta village on Ta'u island on 13 August and the other in Olosega village on 14 August. The instruments began recording about 20 earthquakes per hour. The largest earthquakes, including the felt events, were estimated to be between magnitudes 2 and 3; most of the events were too small to be felt. The exact location and depth of these earthquakes was unknown, due to limited earthquake monitoring equipment, though the data suggested that the events were beneath the Manu'a Islands, likely closer to Ta'u island rather than Ofu-Olosega, and were probably not related to the recently active Vailulu'u seamount. HVO noted that American Samoa’s volcanoes were monitored remotely by satellites and a distant seismic station in Apia, Samoa; the lack of ground-based monitoring stations does not allow for advanced warning of new activity. Both the Volcano Alert Level and Aviation Color Code were categorized as Unassigned due to the lack of a volcano-monitoring network.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Report for Aira
JMA reported that nighttime incandescence at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible during 8-15 August. The seismic network recorded 33 eruptive events and 12 explosions. Volcanic plumes rose as high as 2.5 km above the crater rim and material was ejected large ballistics as high as 1.7 km above the summit. The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from the crater.
Source: Japan Meteorological Agency (JMA)

Report for Ebeko
KVERT reported that moderate activity at Ebeko was ongoing. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions generated ash plumes that rose up to 3.5 km (11,500 ft) a.s.l. and drifted in multiple directions during 4-5 and 7-8 August. A thermal anomaly over the volcano was identified in satellite images during those same days. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Report for Great Sitkin
AVO reported that slow lava effusion at Great Sitkin continued during 9-16 August; no changes to the flow margins were visible but the lava had deepened around the vent. Weather clouds often obscured satellite and webcam views during most of the week. Seismicity was low and occasional local earthquakes were recorded. Elevated surface temperatures were identified in satellite images on most days. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.
Source: US Geological Survey Alaska Volcano Observatory (AVO)

Report for Ibu
PVMBG reported that the eruption at Ibu continued during 9-16 August. Gray-and-white ash plumes of variable densities generally rose as high as 1.5 km above the summit and drifted in multiple directions. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Report for Kadovar
Based on satellite and wind model data, the Darwin VAAC reported that on 14 August an ash plume from Kadovar rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Report for Karymsky
KVERT reported that the eruption at Karymsky continued during 4-11 August. A daily thermal anomaly over the volcano was identified in satellite images. Explosions during 5-9 August produced ash plumes that rose as high as 5 km (16,400 ft) a.s.l. and drifted 550 km in multiple directions. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Report for Kilauea
HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea’s Halema`uma`u Crater during 9-16 August, entering the lava lake and flowing onto the crater floor. Part of the lake was continuously active. The lake level mostly remained within the bounding levees, though daily breakouts were visible along the margins. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)

Report for Krakatau
PVMBG reported that cloudy weather often prevented visual confirmation of the ongoing eruption at Anak Krakatau during 9-16 August. Incandescence at or near the vent was seen in nighttime photos on most days. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay at least 5 km away from the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)

Report for Merapi
BPPTKG reported that the eruption at Merapi continued during 5-11 August and seismicity remained at high levels. As many as 43 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 1.5 km. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 3-7 km away from the summit based on location.
Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)

Report for Pavlof
AVO reported that a minor eruption at a vent on Pavlof’s upper E flank was ongoing during 9-16 August, though cloud cover often prevented visual confirmation. Seismic tremor persisted and multiple small daily explosions were detected in local and regional seismic and infrasound data. The explosions may have produced minor ash emissions that rose no higher than 3 km (10,000 ft) a.s.l. and dissipated quickly, though on a few of the clear views none were seen. Elevated surface temperatures were identified in satellite images on most of the days. The Volcano Alert Level remained at Watch and the Aviation Color Code remained at Orange.
Source: US Geological Survey Alaska Volcano Observatory (AVO)

Report for Popocatepetl
CENAPRED reported that there were 19-204 steam-and-gas emissions, sometimes containing minor amounts of ash, rising from Popocatépetl each day during 9-16 August. A minor explosion was recorded at 0839 on 10 August and a moderate explosion was detected at 1528 on 11 August. Minor ashfall was reported in the municipality of Ecatzingo, State of Mexico. An explosion at 1952 on 13 August was followed at 2125 by minor amounts of ashfall in Tetela del Volcán. The Alert Level remained at Yellow, Phase Two (the middle level on a three-color scale).
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)

Report for Sangay
IG reported that a notable increase in seismicity at Sangay began at around 1000 on 12 August and was followed by the effusion of a lava flow that descended more than 1 km on the SE flank. Strombolian activity was visible at the summit. Ash plumes rose as high as 3.5 km above the summit and drifted 500 km W and SW, past the coastline, and caused daily ashfall in the provinces of Chimborazo and Guayas during 12-16 August. The Guayaquil International Airport canceled several commercial flights on 13 August due to the presence of ash in the atmosphere. Seismicity decreased to previous levels by 16 August.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)

Report for Semeru
The eruption at Semeru continued during 10-16 August. The Darwin VAAC reported that during 13-16 August ash plumes rose to altitudes of 4.3-4.6 km (14,000-15,000 ft) a.s.l. and drifted SW and W based on satellite images and wind models. The Alert Level remained at 3 (on a scale of 1-4). The public was warned to stay at least 5 km away from the summit, and 500 m from Kobokan drainages within 17 km of the summit, along with other drainages originating on Semeru, including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Report for Sheveluch
KVERT reported that the ongoing eruption at Sheveluch was characterized by explosions, hot avalanches, and lava-dome extrusion during 4-11 August. A daily thermal anomaly was identified in satellite images, and gas-and-steam plumes containing some ash were visible drifting 70 km E and SE during 8-9 August. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Report for Suwanosejima
JMA reported that the number of daily explosions at Suwanosejima's Ontake Crater began increasing on 2 August and remained elevated through 7 August; their frequency began decreasing on 8 August. About 11 explosions were recorded during 8-15 August. Eruption plumes rose as high as 2 km above the crater rim and large ballistics were ejected as far as 800 m from the crater. Incandescence from the crater was often visible at night. The Alert Level remained at 2 and the public was warned to stay 1 km away from the crater.
Source: Japan Meteorological Agency (JMA)

Report for Taal
PHIVOLCS reported that sulfur dioxide emissions at Taal averaged 3,802-6,844 tonnes per day during 9-10 and 12-15 August; a high of 13,572 tonnes per day was recorded on 11 August causing significant vog around the caldera and a sulfur odor reported by residents of Banyaga, (Agoncillo), Poblacion 5, Boso-boso, and Gulod (Laurel), and Poblacion (Talisay). Upwelling volcanic gasses and fluids in the lake were visible, along with voluminous steam-rich plumes that rose as high as 3 km above the lake and drifted mainly NE, SE, and SW. The Alert Level remained at 1 (on a scale of 0-5), and PHIVOLCS reminded the public that the entire Taal Volcano Island was a Permanent Danger Zone (PDZ).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)