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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

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 24 August-30 August 2022
Name Location Eruption Start Date Report Status
Chikurachki Paramushir Island (Russia) New
Nevados de Chillan Central Chile New
Ofu-Olosega American Samoa (SW Pacific) New
Semisopochnoi Aleutian Islands (USA) New
Ta'u American Samoa (SW Pacific) New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Dukono Halmahera 1933 Aug 13 Continuing
Ebeko Paramushir Island (Russia) 2022 Jun 11 Continuing
Erta Ale Ethiopia 1967 Jul 2 (in or before) ± 182 days Continuing
Great Sitkin Andreanof Islands (USA) 2021 May 25 Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Klyuchevskoy Central Kamchatka (Russia) 2022 Nov 17 Continuing
Lewotolok Lembata Island Continuing
Merapi Central Java 2020 Dec 31 Continuing
Pavlof Alaska Peninsula, Alaska Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Semeru Eastern Java 2014 Apr 1 ± 15 days Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 18,613 individual reports over 1,152 weeks (average of 16 per week) on 329 different volcanoes.

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Agung Cotopaxi Iliamna Lewotolok Pinatubo St. Helens
Ahyi Cuicocha Iliwerung Little Sitkin Planchon-Peteroa Stromboli
Aira Cumbal Inielika Llaima Poas Sulu Range
Akan Dabbahu Ioto Lokon-Empung Popocatepetl Sumbing
Alaid Davidof Irazu Lonquimay Purace Sundoro
Alu-Dalafilla Dempo Iya Lopevi Puyehue-Cordon Caulle Suretamatai
Ambae Descabezado Grande Izu-Torishima Machin Rabaul Suwanosejima
Ambang Dieng Volcanic Complex Jackson Segment Makushin Raikoke Taal
Ambrym Dukono Kaba Maly Semyachik Ranakah Tair, Jebel at
Anatahan Ebeko Kadovar Manam Raoul Island Takawangha
Aniakchak Ebulobo Kaitoku Seamount Manda Hararo Rasshua Talang
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Marapi Raung Tambora
Antuco Egon Kambalny Maroa Redoubt Tanaga
Apoyeque Ekarma Kanaga Martin Reventador Tandikat-Singgalang
Arenal Epi Kanlaon Masaya Reykjanes Tangkoko-Duasudara
Asamayama Erebus Karangetang Maule, Laguna del Rincon de la Vieja Tangkuban Parahu
Askja Erta Ale Karkar Mauna Loa Rinjani Tara, Batu
Asosan Etna Karthala Mayon Ritter Island Ta'u
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky McDonald Islands Rotorua Taupo
Augustine Eyjafjallajokull Kasatochi Melimoyu Ruang Telica
Avachinsky Fagradalsfjall Katla Merapi Ruapehu Tenerife
Awu Fernandina Katmai Midagahara Ruiz, Nevado del Tengger Caldera
Axial Seamount Fogo Kavachi Misti, El Sabancaya Three Sisters
Azul, Cerro Fonualei Kelimutu Miyakejima Sakar Tinakula
Azumayama Fournaise, Piton de la Kelud Momotombo Salak Tofua
Bagana Fourpeaked Kerinci Monowai San Cristobal Tokachidake
Balbi Fuego Ketoi Montagu Island San Miguel Tolbachik
Bamus Fujisan Kharimkotan Moyorodake [Medvezhia] San Vicente Toliman
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Mutnovsky Sangay Tongariro
Bardarbunga Galeras Kie Besi Myojinsho Sangeang Api Trident
Barren Island Galunggung Kikai Nabro Santa Ana Tungurahua
Batur Gamalama Kilauea Negra, Sierra Santa Maria Turrialba
Bezymianny Gamkonora Kirishimayama Negro, Cerro Sao Jorge Ubinas
Bogoslof Gareloi Kita-Ioto Nightingale Island Sarigan Ugashik-Peulik
Brava Gaua Kizimen Nishinoshima Sarychev Peak Ukinrek Maars
Bristol Island Gorely Klyuchevskoy Nisyros Saunders Ulawun
Bulusan Great Sitkin Kolokol Group Novarupta Savo Unnamed
Calbuco Grimsvotn Koryaksky NW Rota-1 Semeru Unnamed
Callaqui Guagua Pichincha Krakatau Nyamulagira Semisopochnoi Veniaminof
Cameroon Guallatiri Krummel-Garbuna-Welcker Nyiragongo Seulawah Agam Villarrica
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Ofu-Olosega Sheveluch Vulcano
Cayambe Hachijojima Kuchinoerabujima Okataina Shishaldin West Mata
Chachadake [Tiatia] Hakoneyama Kurikomayama Okmok Simbo Westdahl
Chaiten Heard Kusatsu-Shiranesan Ontakesan Sinabung Whakaari/White Island
Chiginagak Hekla Kverkfjoll Oraefajokull Sinarka Witori
Chikurachki Helgrindur La Palma Osorno Siple Wolf
Chiles-Cerro Negro Hierro Lamington Pacaya Sirung Yakedake
Chillan, Nevados de Hokkaido-Komagatake Lamongan Pagan Slamet Yasur
Chirinkotan Home Reef Langila Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chirpoi Hood Lanin Paluweh Soputan Zaozan [Zaosan]
Ciremai Huaynaputina Lascar Panarea Sorikmarapi Zavodovski
Cleveland Hudson, Cerro Late Papandayan Sotara Zhupanovsky
Colima Huila, Nevado del Lateiki Parker Soufriere Hills Zubair Group
Colo Hunga Tonga-Hunga Ha'apai Lengai, Ol Doinyo Pavlof Soufriere St. Vincent
Concepcion Ibu Leroboleng Pelee South Sarigan Seamount
Copahue Ijen Lewotobi Peuet Sague Spurr
 News Feeds and Google Placemarks


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The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. At the end of each report is a list of the sources used. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. This feature was first made available on 5 March 2008.



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A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano profile page and to the complete Weekly Report for that week. This feature was first made available on 1 April 2009.

 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.

4. Many news agencies do not archive the articles they post on the Internet, and therefore the links to some sources may not be active. To obtain information about the cited articles that are no longer available on the Internet contact the source.

5. USGS Disclaimer Statement for this Website:

Information presented on this website is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credit is requested. We strongly recommend that USGS data be acquired directly from a USGS server and not through other sources that may change the data in some way. While USGS makes every effort to provide accurate and complete information, various data such as names, telephone numbers, etc. may change prior to updating. USGS welcomes suggestions on how to improve our home page and correct errors. USGS provides no warranty, expressed or implied, as to the accuracy, reliability or completeness of furnished data.

Some of the documents on this server may contain live references (or pointers) to information created and maintained by other organizations. Please note that USGS does not control and cannot guarantee the relevance, timeliness, or accuracy of these outside materials.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL: https://volcano.si.edu/reports_weekly.cfm

 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 Chikurachki
KVERT reported that during 23-25 August occasional ash plumes from Chikurachki rose as high as 2 km (6,600 ft) a.s.l. and drifted about 20 km E. A thermal anomaly was identified in satellite images on 25 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 Nevados de Chillan
SERNAGEOMIN reported that on 29 August an explosion at Dome 4 in Nevados de Chillán’s Nicanor Crater produced a plume with a high tephra content that rose 2 km above the crater rim and drifted S. The explosion also generated a pyroclastic flow that descended less than 500 m on the E and SE flanks. The Alert Level remained at Yellow, the second lowest level on a four-color scale. ONEMI stated that Alert Level Yellow (the middle level on a three-color scale) remained in place for the communities of Pinto and Coihueco, noting that the public should stay at least 2 km away from the crater.
Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)
Report for Ofu-Olosega
Data from seismometers recently installed on Tutuila, Ta’u, and Ofu-Olosega islands of American Samoa to monitor an ongoing seismic swarm indicated that the events were related to Ta’u Island and not Ofu-Olosega. HVO lowered the Volcano Alert Level to Normal and the Aviation Color Code to Green on 26 August. The report warned residents of Ofu-Olosega that they could still be significantly affected by events that may take place on or around Ta’u Island.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Semisopochnoi
AVO reported ongoing low-level seismicity and steam emissions at Semisopochnoi during 23-30 August. Satellite images were mostly cloudy; steam emissions were seen almost daily in webcam images. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Ta'u
HVO reported that an earthquake swarm in the Manu'a Islands of American Samoa continued to be felt by residents of Ta'u Island and Ofu-Olosega islands during 24-30 August. Three advanced seismometers were installed beginning the second week of August, one on Ofu Island and two on Ta'u, and by 26 August the data indicated that the source of the activity was related to Ta'u Island. Around 30 earthquakes per hour were recorded each day. At 2033 on 23 August an earthquake widely felt by residents of the Manu'a islands and Tutuila Island was characterized as producing light-to-moderate shaking (a maximum Intensity of V on the Modified Mercalli Intensity Scale); the estimated M 3-3.5 event was the largest recorded since the new instruments were installed. The largest earthquakes recorded during 25-26 August had estimated magnitudes between 3 and 4 and were felt by residents of Manu'a. An estimated M 2.8 event was strongly felt at 0932 on 27 August. Numerous events were felt during 27-28 August, but none were reported during 28-30 August. Booming noises had been reported and investigated for weeks; scientists confirmed that they were related to the earthquakes, noting that the sound waves generated by some earthquakes could produce sounds audible to humans. No signs of ground cracking, landslides, rockfalls, or other activity that could have caused the sounds were seen. The Volcano Alert Level remained at Advisory and the Aviation Color Code remained at Yellow.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Aira
JMA reported low but continuing activity from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) during 22-29 August. Small eruptive events were recorded throughout the week, and nighttime incandescence from the crater was visible during 26-29 August. 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 Dukono
PVMBG reported that almost daily white plumes from Dukono rose as high as 200 m above the summit and drifted SW, W, and NW. During 27-18 August dense white, gray, and brown ash plumes rose as high as 1 km above the summit and drifted SW and W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ebeko
KVERT reported that moderate activity at Ebeko was ongoing. A thermal anomaly over the volcano was identified in satellite images during 18-19, 22, and 25 August. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions generated ash plumes that rose up to 3 km (10,000 ft) a.s.l. during 19 and 22-25 August and drifted N and E. 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 Erta Ale
Thermal anomalies of variable intensities at Erta Ale’s N and S pit craters were periodically identified in satellite images during August. On 1 August there were two anomalies in the S pit crater and none in the N pit crater. Images were cloudy on 6 and 11 August. On 16 August two anomalies were again visible in the S pit crater while one large anomaly occupied the N crater. Translucent weather clouds obscured views on 21 August, though two anomalies were visible in the S pit crater. Dense weather clouds covered the N pit crater on 26 August and obscured the S pit crater, though one anomaly was visible.
Source: Sentinel Hub
Report for Great Sitkin
AVO reported that slow lava effusion at Great Sitkin probably continued during 24-30 August with lava around the vent likely thickening. Weather clouds often obscured satellite and webcam views during most of the week; elevated surface temperatures were occasionally visible. Seismicity was very low. 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 Karymsky
KVERT reported that the eruption at Karymsky continued during 18-25 August. A thermal anomaly over the volcano was identified in satellite images during 18-19, 22, and 24-25 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 Kilauea
HVO reported that lava continued to effuse from a vent in the lower W wall of Kilauea’s Halema`uma`u Crater during 24-30 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 Klyuchevskoy
Strong winds re-suspended ash from the E flank of Klyuchevskoy and created plumes that were visible in satellite images drifting more than 205 km E during 25-26 August. KVERT raised the Aviation Color Code to Orange on 26 August; plumes were not visible the next day so the Aviation Color Code was lowered back to Green.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Lewotolok
PVMBG reported that the Strombolian eruption at Lewotolok continued during 23-30 August. Daily white emissions rose as high as 700 m above the summit and drifted in multiple directions. Photos posted with daily reports showed crater incandescence and occasional Strombolian activity. The Alert Level remained at 3 (on a scale of 1-4) and the public was warned to stay 3 km away from the summit crater and 4 km away from the crater on the SE flank.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Merapi
BPPTKG reported that the eruption at Merapi continued during 19-25 August. Seismicity intensified compared to the previous week; in particular the number of deep volcanic earthquakes increased and indicated magmatic activity at depths less than 1.5 km. As many as 19 lava avalanches traveled down the Bebeng drainage on the SW flank, reaching a maximum distance of 1.8 km. Photo analyses showed no height changes at the SW and central lava domes, though some changes at the SW dome were observed due to avalanche activity. 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 23-30 August, though there was no evidence of lava effusion. Seismic tremor persisted. A small ash emission rose to about 4 km (12,000 ft) a.s.l. on 24 August and was seen by passing aircraft. Sulfur dioxide emissions were also detected that same day. 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 15-75 steam-and-gas emissions, sometimes containing minor amounts of ash, rising from Popocatépetl each day during 23-30 August. A moderate explosion was detected at 0117 on 30 August. 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 Reventador
IG characterized the ongoing eruption at Reventador as moderate during 23-30 August. Gas-and-ash plumes, observed with webcams or reported by the Washington VAAC, rose as high as 1.6 km above the summit and drifted in multiple directions. Crater incandescence was visible on most nights and often during early morning hours. Incandescent blocks were visible rolling 500 m down the NE flank during 24-25 August and 600 m down all flanks during 28-29 August.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Semeru
PVMBG reported that the eruption at Semeru continued during 23-30 August. Eruptive events at 0735 on 26 August, 0606 and 0628 on 27 August, 0623 on 28 August, and 0618 on 29 August produced ash plumes that rose 500-600 m above the summit and drifted N, W, and SW. 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: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Sheveluch
KVERT reported that the ongoing eruption at Sheveluch was characterized by explosions, hot avalanches, and lava-dome extrusion during 18-25 August. A daily thermal anomaly was identified in satellite images during 18-19, 21, and 23-25 August. Ash plumes drifted 190 km SE and 150 km E on 19 and 25 August, respectively. 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
At 2151 on 28 August a large eruptive event at Suwanosejima's Ontake Crater ejected large bombs 800 m above the vent and produced an eruption plume that rose into overhead weather clouds. Crater incandescence was visible in webcam images overnight. By 0900 on 29 August three more explosions were recorded and produced ash plumes that rose as high as 1.3 km above the vent. The Alert Level remained at 2 and the public was warned to stay 1 km away from the crater.
Source: Japan Meteorological Agency (JMA)