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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 7 July-13 July 2021
Name Location Eruption Start Date Report Status
Bagana Bougainville (Papua New Guinea) 2000 Feb 28 (in or before) New
Krakatau Indonesia 2021 May 25 New
Pavlof United States 2021 Aug 5 New
Sarychev Peak Matua Island (Russia) 2020 Feb 29 ± 1 days New
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 New
Taal Luzon (Philippines) New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Dukono Halmahera (Indonesia) 1933 Aug 13 Continuing
Ebeko Paramushir Island (Russia) Continuing
Etna Sicily (Italy) 2013 Sep 3 Continuing
Karymsky Eastern Kamchatka (Russia) 2020 Apr 1 Continuing
Krysuvik-Trolladyngja Iceland Continuing
Lewotolok Lembata Island (Indonesia) 2020 Nov 27 Continuing
Merapi Central Java (Indonesia) 2020 Dec 31 Continuing
Nevados de Chillan Chile 2016 Jan 8 Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Semeru Eastern Java (Indonesia) 2014 Apr 1 ± 15 days Continuing
Semisopochnoi Aleutian Islands (USA) 2021 Feb 2 ± 2 days Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Sinabung Indonesia Continuing
Veniaminof United States Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 17,388 individual reports over 1,098 weeks (average of 16 per week) on 315 different volcanoes.

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Agung Concepcion Ibu Little Sitkin Peuet Sague Spurr
Ahyi Copahue Ijen Llaima Pinatubo St. Helens
Aira Cotopaxi Iliamna Loihi Planchon-Peteroa Stromboli
Akan Cuicocha Iliwerung Lokon-Empung Poas Sulu Range
Alaid Cumbal Inielika Lopevi Popocatepetl Sumbing
Alu-Dalafilla Dabbahu Ioto Machin Puyehue-Cordon Caulle Sundoro
Ambae Davidof Irazu Makian Rabaul Suretamatai
Ambang Dempo Iya Makushin Raikoke Suwanosejima
Ambrym Descabezado Grande Izu-Torishima Maly Semyachik Ranakah Taal
Anatahan Dieng Volcanic Complex Jackson Segment Manam Raoul Island Tair, Jebel at
Aniakchak Dukono Kaba Manda Hararo Rasshua Takawangha
Antillanca Volcanic Complex Ebeko Kadovar Marapi Raung Talang
Antuco Ebulobo Kambalny Maroa Redoubt Tambora
Apoyeque Egon Kanaga Martin Reventador Tanaga
Arenal Ekarma Kanlaon Masaya Reykjanes Tandikat-Singgalang
Asamayama Epi Karangetang Maule, Laguna del Rincon de la Vieja Tangkoko-Duasudara
Askja Erebus Karkar Mauna Loa Rinjani Tangkuban Parahu
Asosan Erta Ale Karthala Mayon Ritter Island Tara, Batu
Atka Etna Karymsky McDonald Islands Rotorua Telica
Augustine Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruang Tenerife
Avachinsky Eyjafjallajokull Katla Merapi Ruapehu Tengger Caldera
Awu Fernandina Katmai Midagahara Ruiz, Nevado del Three Sisters
Axial Seamount Fogo Kavachi Misti, El Sabancaya Tinakula
Azul, Cerro Fonualei Kelimutu Miyakejima Sakar Tofua
Azumayama Fournaise, Piton de la Kelud Momotombo Salak Tokachidake
Bagana Fourpeaked Kerinci Monowai San Cristobal Tolbachik
Balbi Fuego Ketoi Montagu Island San Miguel Toliman
Bamus Fujisan Kharimkotan Moyorodake [Medvezhia] San Vicente Tongariro
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Mutnovsky Sangay Tungurahua
Bardarbunga Galeras Kikai Myojinsho Sangeang Api Turrialba
Barren Island Galunggung Kilauea Nabro Santa Ana Ubinas
Batur Gamalama Kirishimayama Negra, Sierra Santa Maria Ugashik-Peulik
Bezymianny Gamkonora Kizimen Negro, Cerro Sarigan Ukinrek Maars
Bogoslof Gareloi Klyuchevskoy Nightingale Island Sarychev Peak Ulawun
Brava Gaua Kolokol Group Nishinoshima Saunders Unnamed
Bristol Island Gorely Koryaksky Nisyros Savo Unnamed
Bulusan Great Sitkin Krakatau Novarupta Semeru Veniaminof
Calbuco Grimsvotn Krummel-Garbuna-Welcker NW Rota-1 Semisopochnoi Villarrica
Callaqui Guagua Pichincha Krysuvik-Trolladyngja Nyamulagira Seulawah Agam Vulcano
Cameroon Guallatiri Kuchinoerabujima Nyiragongo Sheveluch West Mata
Campi Flegrei del Mar di Sicilia Guntur Kurikomayama Okataina Shishaldin Westdahl
Cayambe Hachijojima Kusatsu-Shiranesan Okmok Simbo Whakaari/White Island
Chachadake [Tiatia] Hakoneyama Kverkfjoll Ontakesan Sinabung Witori
Chaiten Heard La Palma Oraefajokull Sinarka Wolf
Chiginagak Hekla Lamington Osorno Siple Yasur
Chikurachki Helgrindur Lamongan Pacaya Sirung Zaozan [Zaosan]
Chiles-Cerro Negro Hierro Langila Pagan Slamet Zavodovski
Chillan, Nevados de Hokkaido-Komagatake Lanin Palena Volcanic Group Snaefellsjokull Zhupanovsky
Chirinkotan Home Reef Lascar Paluweh Soputan Zubair Group
Chirpoi Hood Lateiki Panarea Sorikmarapi
Ciremai Huaynaputina Lengai, Ol Doinyo Papandayan Sotara
Cleveland Hudson, Cerro Leroboleng Parker Soufriere Hills
Colima Huila, Nevado del Lewotobi Pavlof Soufriere St. Vincent
Colo Hunga Tonga-Hunga Ha'apai Lewotolok Pelee South Sarigan Seamount
 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 Bagana
Based on satellite and wind model data, the Darwin VAAC reported that on 9 July an ash plume from Bagana rose to 1.8 km (6,000 ft) a.s.l. and drifted W.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Krakatau
The Darwin VAAC reported that on 7 July ash plumes from Anak Krakatau rose to 1.5 km (5,000 ft) a.s.l. and drifted NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Pavlof
At 1140 on 9 July AVO raised the Volcano Alert Level and Aviation Color Code at Pavlof to Advisory and Yellow, respectively, noting that seismicity had increased during the previous 16 hours and was characterized by near-continuous tremor. Seismicity decreased and was more periodic during 10-13 July, but remained above background levels.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Sarychev Peak
SVERT reported that on 29 June and 1 July brief ash emissions from Sarychev Peak rose to 3 km (10,000 ft) a.s.l. A weak thermal anomaly identified in satellite data persisted through 12 July; SVERT lowered the Alert Level to Green (the lowest level on a four-color scale).
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Suwanosejima
JMA reported that 96 explosions at Suwanosejima's Ontake Crater produced eruption plumes that generally rose 2-2.4 km above the crater rim during 5-12 July. Large volcanic bombs were ejected mainly 400 m from the crater and crater incandescence was visible nightly. Eruption sounds were sometimes heard in Toshima village (4 km SSW). An explosion at 0439 on 8 July ejected large bombs 800 m NW and an explosion at 1319 on 12 July produced an ash plume that rose 3 km. The Alert Level remained at 3 and the public was warned to stay 2 km away from the crater.
Source: Japan Meteorological Agency (JMA)
Report for Taal
PHIVOLCS reported that an eruption at Taal continued during 7-13 July. A series of short-lived phreatomagmatic explosions were recorded at 0518, 0847, 0915, 0926, 1156, and 2141 on 7 July and jetted ash plumes as high has 700 m. Another series was recorded at 0647, 1806, 2121, 2150 on 8 July and 0259 on 9 July, jetting ash 200 m high.

During 7-13 July daily plumes of steam and sulfur dioxide gas rose 1-1.5 km from the lake and drifted NW, W, and SW. Sulfur dioxide emissions averaged 4,149-11,397 tonnes/day. Low-level background tremor continued with as many as 185 volcanic earthquakes and 44 low-frequency volcanic earthquakes recorded per day. There were also 5-176 daily episodes of volcanic tremor, each lasting between 1 and 97 minutes. The network also detected 2-10 daily hybrid earthquakes during 6-9 July. The DROMIC report stated that 10,408 people were in evacuation centers or private residences by 12 July. The Alert Level remained at 3 (on a scale of 0-5) and PHIVOLCS reminded the public that the entire Taal Volcano Island is a Permanent Danger Zone (PDZ) and to not enter the high-risk barangays of Agoncillo and Laurel. Activities on Taal Lake were strictly prohibited.
Sources: Philippine Institute of Volcanology and Seismology (PHIVOLCS), Disaster Response Operations Monitoring and Information Center (DROMIC)
Report for Aira
JMA reported that very small eruptive events were occasionally recorded at Minamidake Crater (at Aira Caldera’s Sakurajima volcano). Crater incandescence was visible at night during 9-12 July. 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
Based on satellite and wind model data, the Darwin VAAC reported that during 8 and 11-13 July ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted N, NW, W, and SW. 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.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ebeko
According to volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, explosions during 2, 4, and 6-8 July produced ash plumes that rose as high as 3 km (10,000 ft) a.s.l. and drifted E and SE. A thermal anomaly was identified in satellite images during 5-7 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Etna
INGV reported continuing Strombolian activity and two episodes of lava fountaining Etna’s Southeast Crater (SEC) during 5-11 July. The first episode began at 1130 on 6 July with Strombolian activity at SEC. The intensity and frequency of explosions progressively intensified and formed lava fountains. Ash plumes rose to 1.5 km (5,000 ft) a.s.l. and drifted S, causing ashfall in areas downwind. A small lava flow originated from the S side of the cone and traveled SW, stopping at 2,800 m elevation. During fieldwork on 7 July scientist observed deposits of bombs, 1 m in diameter, on the N flank and smaller bombs scattered farther away. A second episode began at 2100 on 8 July with Strombolian activity which again intensified and formed lava fountains. Ash plumes rose to 3.4 km (11,000 ft) a.s.l. and drifted SE, causing ashfall in downwind areas. Lava flowed SW to 2,350 m elevation.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Karymsky
KVERT reported that a thermal anomaly over Karymsky was idenitifed in satellite images during 5-8 July and ash plumes were visible drifting 60 km W and E during 6-8 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Krysuvik-Trolladyngja
The fissure eruption in the W part of the Krýsuvík-Trölladyngja volcanic system, close to Fagradalsfjall on the Reykjanes Peninsula, continued during 7-13 July. Lava fountaining and overflows from the fifth vent were sometimes visible, and lava from the crater flowed in tubes as well as on the surface. Visible activity at the vent occasionally paused for various lengths of time, though sub-surface lava likely continued flowing through the tube system. Weather conditions prevented views of the crater on some days and also created hazardous conditions. The Aviation Color Code remained at Orange due to the lack of ash and tephra emissions, though IMO warned of the potential for lapilli and scoria fallout within a 650 m radius of the active vent. Authorities warned of increased gas emissions hazards.
Sources: Icelandic Meteorological Office (IMO), Icelandic National Broadcasting Service (RUV), Icelandic National Broadcasting Service (RUV)
Report for Lewotolok
PVMBG reported that daily white-and-gray plumes from Lewotolok rose as high as 1.1 km and drifted SW, W, and NW during 6-12 July. Incandescent material was ejected from the summit vent on 6, 8, and 10 July; on 6 July material landed as far as 300 m away. The Darwin VAAC noted that on 7 July an ash plume rose 2.7 km (9,000 ft) a.s.l. and drifted E, based on satellite data and information from PVMBG. 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.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Merapi
BPPTKG reported that the lava dome just below Merapi’s SW rim and the lava dome in the summit crater both remained active during 2-8 July. The SW rim lava-dome volume was an estimated 1.815 million cubic meters by 8 July and continued to shed material down the flank. The volume of the summit lava dome was 2,741 million cubic meters. A total of 17 pyroclastic flows traveled a maximum of 2 km down the SW flank and as far as 1.5 km SE. As many as 125 incandescent avalanches traveled a maximum of 2 km down the SW flank and 1.8 km down the SE flank. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 5 km away from the summit.
Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)
Report for Nevados de Chillan
SERNAGEOMIN reported continuing explosive and effusive activity at Nevados de Chillán’s Nicanor Crater during 16-30 June, alomg with increased sulfur dioxide emissions and thermal anomalies. Explosions generated ash plumes that rose as high as 1.4 km above the crater rim and crater incandescence at night; incandescent material was ejected as far as 500 m onto the N, E, and S flanks. The L5 and L6 lava flows continued to be active, with increased effusion rates during 17-19 and 27-28 June. During the periods of increased effusion rates the flow temperatures were higher, nighttime incandescence was more intense, emissions rose higher, and more pyroclastic flows were recorded. The pyroclastic flows traveled less than 500 m down the NE flank and were sourced from collapses at the sides of L6 and the front of L5. The average temperature was 131 degrees Celsius with a maximum of 174 degrees for L5 and an average of 163 degrees Celsius with a maximum of 181 degrees for L6. Temperatures at the vents at Nicanor Crater were as high as 360 degrees Celsius during explosive phases. Satellite images indicated that the L5 lava flow was 1,033 m long and L6 was 894 m long, and that the distal end of L6 had thickened. The average sulfur dioxide emission rate was 694 (± 43) tons/day, reaching a high value of 903 on 19 June. There was a total of 35 thermal anomalies. 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 Popocatepetl
CENAPRED reported that each day during 6-13 July there were 47-112 steam-and-gas emissions from Popocatépetl. Some emissions contained ash during 8-13 July. Almost daily periods of low-amplitude tremor lasted from 10 minutes to five hours. A few volcano-tectonic earthquakes were recorded. Crater incandescence was visible at night during 12-13 July. The Alert Level remained at Yellow, Phase Two (middle level on a three-color scale).
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Semeru
Semeru continued to erupt during 7-13 July. Inclement weather often prevented visual observations, though a gray-and-white ash plume was seen rising 500 m above the summit and drifting SW on 6 July. The Alert Level remained at 2 (on a scale of 1-4), with a general exclusion zone of 1 km and extensions to 5 km in the SSE sector.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Semisopochnoi
AVO reported that continuous volcanic tremor at Semisopochnoi began at 1200 on 12 July and explosive activity was recorded by the infrasound network. Emissions began at 1300 and lasted tens of minutes; a sulfur dioxide gas plume possibly containing ash was identified in satellite images drifting S at an altitude less than 1.5 km (5,000 ft) a.s.l. The Aviation Color Code was raised to Orange and the Volcano Alert Level was raised to Watch. Volcanic tremor decreased to low levels after several hours.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Sheveluch
KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 2-9 July. A plume of re-suspended ash drifted 90 km E during 6-7 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Sinabung
PVMBG reported that on most days during 6-13 July white gas-and-steam plumes from Sinabung rose as high as 500 m above the summit. At 0925 on 13 July an eruptive or collapse event produced an ash plume that rose 500 m and drifted ESE. 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 Veniaminof
AVO changed both the Aviation Color Code and Volcano Alert Level for Veniaminof to Green and Normal, respectively, on 8 July, noting that seismic stations were back online. The monitoring network consists of local and regional seismic stations, regional infrasound networks, lightning detection, and satellite image monitoring.
Source: US Geological Survey Alaska Volcano Observatory (AVO)