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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 14 July-20 July 2010
Name Location Eruption Start Date Report Status
Gorely Southern Kamchatka (Russia) New
Soufriere Hills Montserrat New
Ubinas Peru New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Batu Tara Komba Island Continuing
Fuego South-Central Guatemala 2002 Jan 4 Continuing
Karymsky Eastern Kamchatka (Russia) 2020 Apr 1 Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Klyuchevskoy Central Kamchatka (Russia) Continuing
Nevado del Ruiz Colombia 2014 Nov 18 Continuing
Pacaya South-Central Guatemala Continuing
Santa Maria Southwestern Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Tungurahua Ecuador Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 17,900 individual reports over 1,120 weeks (average of 16 per week) on 321 different volcanoes.

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Agung Copahue Ijen Lewotolok Pinatubo Spurr
Ahyi Cotopaxi Iliamna Little Sitkin Planchon-Peteroa St. Helens
Aira Cuicocha Iliwerung Llaima Poas Stromboli
Akan Cumbal Inielika Lokon-Empung Popocatepetl Sulu Range
Alaid Dabbahu Ioto Lonquimay Purace Sumbing
Alu-Dalafilla Davidof Irazu Lopevi Puyehue-Cordon Caulle Sundoro
Ambae Dempo Iya Machin Rabaul Suretamatai
Ambang Descabezado Grande Izu-Torishima Makushin Raikoke Suwanosejima
Ambrym Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Taal
Anatahan Dukono Kaba Manam Raoul Island Tair, Jebel at
Aniakchak Ebeko Kadovar Manda Hararo Rasshua Takawangha
Antillanca Volcanic Complex Ebulobo Kama'ehuakanaloa Marapi Raung Talang
Antuco Edgecumbe 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 Volcanic Complex 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 Kie Besi Myojinsho Sangeang Api Turrialba
Barren Island Galunggung Kikai Nabro Santa Ana Ubinas
Batur Gamalama Kilauea Negra, Sierra Santa Maria Ugashik-Peulik
Bezymianny Gamkonora Kirishimayama Negro, Cerro Sao Jorge Ukinrek Maars
Bogoslof Gareloi Kita-Ioto Nightingale Island Sarigan Ulawun
Brava Gaua Kizimen Nishinoshima Sarychev Peak Unnamed
Bristol Island Gorely Klyuchevskoy Nisyros Saunders Unnamed
Bulusan Great Sitkin Kolokol Group Novarupta Savo Veniaminof
Calbuco Grimsvotn Koryaksky NW Rota-1 Semeru Villarrica
Callaqui Guagua Pichincha Krakatau Nyamulagira Semisopochnoi Vulcano
Cameroon Guallatiri Krummel-Garbuna-Welcker Nyiragongo Seulawah Agam West Mata
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Okataina Sheveluch Westdahl
Cayambe Hachijojima Kuchinoerabujima Okmok Shishaldin Whakaari/White Island
Chachadake [Tiatia] Hakoneyama Kurikomayama Ontakesan Simbo Witori
Chaiten Heard Kusatsu-Shiranesan Oraefajokull Sinabung Wolf
Chiginagak Hekla Kverkfjoll Osorno Sinarka Yakedake
Chikurachki Helgrindur La Palma Pacaya Siple Yasur
Chiles-Cerro Negro Hierro Lamington Pagan Sirung Zaozan [Zaosan]
Chillan, Nevados de Hokkaido-Komagatake Lamongan Palena Volcanic Group Slamet Zavodovski
Chirinkotan Home Reef Langila Paluweh Snaefellsjokull Zhupanovsky
Chirpoi Hood Lanin Panarea Soputan Zubair Group
Ciremai Huaynaputina Lascar Papandayan Sorikmarapi
Cleveland Hudson, Cerro Lateiki Parker Sotara
Colima Huila, Nevado del Lengai, Ol Doinyo Pavlof Soufriere Hills
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Pelee Soufriere St. Vincent
Concepcion Ibu Lewotobi Peuet Sague 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 Gorely
KVERT reported that during 9-16 July seismic activity from Gorely was above background levels, and gas-and-steam emissions rose from the crater most days. On 10 July, data suggested that the vent on the crater's inner NE wall, above the level of the lake, had grown by 2-3 times the original size. The lake level had also fallen. Analysis of satellite imagery showed a thermal anomaly over Gorely on 8, 10, 12, and 14 July, and gas-and-steam plumes that drifted 25-150 km SE, E, and S during 10 and 14-15 July. The Level of Aviation Color Code remained at Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
MVO reported that activity at Soufrière Hills was low during 9-16 July. Helicopter observations on 15 July revealed no major changes to the lava dome, although there were some fresh rockfall and small pyroclastic-flow deposits at the head of the Gages valley to the W. The next day, heavy rainfall generated a few lahars in the Belham valley to the NW. The Hazard Level remained at 3.
Source: Montserrat Volcano Observatory (MVO)
Report for Ubinas
Based on a pilot observation and analyses of satellite imagery, the Buenos Aires VAAC reported that on 18 July an ash plume from Ubinas drifted NE. A subsequent report about 12 hours later stated that no further activity was seen.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Aira
Based on JMA notices, the Tokyo VAAC reported explosions from Sakura-jima on 14 and 20 July. During 15-18 July pilots observed ash plumes that rose to altitudes of 1.8-3.4 km (6,000-11,000 ft) a.s.l. and drifted NE, N, and NW. Plumes on 20 July rose as high as 2.1 km (7,000 ft) a.s.l. and drifted NW and N.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Batu Tara
Based on analyses of satellite imagery, the Darwin VAAC reported that during 18-20 July ash plumes from Batu Tara rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted more than 35 km NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Fuego
INSIVUMEH reported on 19 July that six explosions from Fuego produced ash plumes that rose to an altitude of 4.4 km (14,400 ft) a.s.l. and drifted W and SW. Rumbling and "degassing" sounds were associated with the explosions. Light ashfall was reported in Sangre de Cristo, 10 km WSW. The seismic network had recorded a total of 17 explosions within the previous 24 hours.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Karymsky
KVERT reported that satellite imagery showed ash plumes from Karymsky drifting 30 km W and S on 7 and 8 July and a thermal anomaly over the volcano during 8-10 and 12 July. Seismic activity was above background levels during 12-14 July and suggested that possible ash plumes rose to an altitude of 3.3 km (10,800 ft) a.s.l. Seismic data were not available other days during 9-16 July due to technical problems. Based on analyses of satellite imagery, the Tokyo VAAC reported that on 19 July a possible eruption produced a plume that rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SW. Ash was noted and then later dissipated. A possible eruption was reported the next day, and again a subsequent satellite image showed that ash had dissipated within a few hours. The Aviation Color Code level remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Kilauea
During 14-20 July HVO reported that activity at Kilauea continued from the summit and the east rift zone. At the summit, the level of a lava-pool surface in the deep pit within the floor of Halema'uma'u crater remained mostly stable; glow from the vent was also visible at night. A plume from the vent mainly drifted SW. At the east rift zone, two lava flows that broke out of the TEB lava-tube system advanced E through the coastal highway 130/137 intersection beginning on 17 July, and by 19 July were within 70 m of the nearest structure. A second set of active lava lobes were approximately 1 km to the NW and also advanced toward that general area. According to a news article, two people evacuated their home in Kalapana due to advancing lava flows.
Sources: US Geological Survey Hawaiian Volcano Observatory (HVO), Associated Press
Report for Klyuchevskoy
KVERT reported that during 9-16 July seismic activity from Kliuchevskoi was above background levels. Satellite imagery analysis showed a large daily thermal anomaly over the volcano and a gas-and-ash plume that drifted 45 km NW on 14 July. Strombolian activity and gas-and-ash emissions were observed during 9, 12, and 14-15 July. Ash plumes occasionally rose to an altitude of 6.8 km (22,300 ft) a.s.l. Based on analyses of satellite imagery and information from KVERT, the Tokyo VAAC reported a possible eruption on 17 July. Ash was seen in satellite imagery and then later dissipated. An eruption on 19 July and a possible eruption the next day produced plumes that rose to altitudes of 5.2-5.5 km (17,000-18,000 ft) a.s.l. and drifted SW and SE. The Aviation Color Code level remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Nevado del Ruiz
The Washington VAAC reported that a plume at an altitude of 7 km (23,000 ft) a.s.l. from a possible eruption from Nevado del Ruiz on 17 July was stated in a Bogota MWO SIGMET notice. A second VAAC report less than an hour later noted a brief seismic signal alert had been issued and that meteorological cloud cover prevented observations of the volcano. Ash was not seen in satellite imagery later that day nor were there any additional reports of activity. [INGEOMINAS later confirmed that no eruption had occurred.]
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Pacaya
INSIVUMEH reported that, after an increase in Pacaya's activity on 13 July, a decrease in seismicity was noted on 14 July. Strombolian explosions occurred on 14 July at 5-10 minute intervals, and occasional small pyroclastic flows traveled S. Gray ash plumes rose 500 m and drifted WSW. On 19 July, fumarolic plumes rose 100 m above MacKenney crater and drifted N. The seismic network had recorded a total of 120 explosions within the previous 24 hours. On 20 July Strombolian explosions generated ash plumes that rose 100 m and drifted 2 km N.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Santa Maria
INSIVUMEH reported that 16 explosions from Santa María's Santiaguito lava dome complex during 19-20 July produced ash plumes that rose 300-900 m above Santiaguito and drifted SE and W. Ashfall was reported downwind in San José and La Quina. The seismic network had recorded a total of 24 explosions within the 48 hour period.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
KVERT reported that during 9-16 July seismic activity from Shiveluch was above background levels and suggested that possible ash plumes rose to an altitude of 4.3 km (12,100 ft) a.s.l. Satellite imagery showed a large daily thermal anomaly over the lava dome. Gas-and-steam plumes were seen rising to an altitude of 3.7 km (12,100 ft) a.s.l. during 9 and 11-14 July. Based on analysis of satellite imagery, the Tokyo VAAC reported a possible eruption on 19 July. Ash was seen in subsequent satellite images and then later dissipated. The Aviation Color Code level remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima on 17 and 19 July. Details of possible resulting plumes were not reported.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
Observations of Tungurahua's summit area during 13-20 July were sometimes not possible due to inclement weather. On 13 July incandescent blocks were seen rolling down the flanks at night and ashfall was reported in areas 8 km SW. Incandescence from the crater was seen the next night and ashfall was again reported in areas to the SW. During 15-18 July steam-and-ash plumes were observed and occasionally drifted SW. Ashfall was noted in areas within 8 km SW, W, and NW. Lahars descended drainages to the SW, NW, and N on 15 July. Rolling blocks on the flanks were seen after explosions on 18 July. During 19-20 July steam plumes drifted NW and W.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)