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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, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail.

This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed narratives on various volcanoes are published as reports of the Bulletin of the Global Volcanism Network.

Smithsonian / USGS Weekly Volcanic Activity Report for the week of 7 August-13 August 2013
Name Location Eruption Start Date Report Status
Ketoi Kuril Islands (Russia) New
Paluweh Indonesia New
Tungurahua Ecuador New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Chirinkotan Kuril Islands (Russia) Continuing
Chirpoi Kuril Islands (Russia) Continuing
Kilauea Hawaiian Islands (USA) Continuing
Kizimen Eastern Kamchatka (Russia) Continuing
Pacaya Guatemala 2015 Jun 7 ± 1 days Continuing
Pavlof United States Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Santa Maria Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Tolbachik Central Kamchatka (Russia) Continuing
Veniaminof United States Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 16,302 individual reports over 1,046 weeks (average of 16 per week) on 308 different volcanoes.

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


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

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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Download Smithsonian/USGS Weekly Volcanic Activity Report Network Link Download Smithsonian / USGS Weekly Volcanic Activity Report Network Link

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 monthly, and 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 Ketoi
SVERT reported that a thermal anomaly over Ketoi's Pallas Peak was detected in satellite images during 5-7 and 9 August, and possibly during 10-11 August. Steam-and-gas emissions were detected on 9 August. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Paluweh
According to news articles, a partial lava-dome collapse at Paluweh on 10 August generated a pyroclastic flow that traveled N towards a beach village and killed at least 5 people. A volcanologist at the monitoring post for Paluweh noted that the eruption lasted seven minutes, and that the pyroclastic flow burned trees around the beach and villages, making it difficult to reach the victims. Pyroclastic flows continued to be reported hours after the initial eruption. Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that an ash plume rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted 130 km W.

News sources noted that a mandatory evacuation order had caused some residents to evacuate prior to the eruption on 10 August, but nearly10,000 still remained on the island. After the eruption, a rescue team was sent to evacuate about 2,000 people that remained inside a 3-km exclusion zone. A team member noted that rescuing people was difficult since they were reluctant to leave their livestock and homes, but also that the ground was hot and covered in 10-20 cm of ash. The VAAC reported that during 11-12 August ash plumes rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted 110-130 km W. A news article noted that the eruptions were smaller on 12 August, but pyroclastic flows continued to be observed. The Alert Level remained at 3 (on a scale of 0-4).
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC), Associated Press, CNN, Agence France-Presse (AFP), National Public Radio (NPR)
Report for Tungurahua
IG reported that seismic activity at Tungurahua was moderate to high during 7-13 August; the seismic network detected long-period earthquakes indicating fluid movement and some emissions. Although cloud cover mostly prevented visual observations of the crater, plumes were occasionally observed. On 8 August an ash plume rose 2 km and drifted W, and ash fell in Choglontus (SW). A small steam plume rose 100 m and drifted SW the next day. Minor vapor emissions were noted on 11 and 13 August.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Aira
Based on information from JMA, the Tokyo VAAC reported that during 7-11 and 13 August explosions from Sakura-jima generated plumes that rose to altitudes of 1.8-4.6 km (6,000-15,000 ft) a.s.l. and drifted SE, S, and NW. On 8, 10 and 13 August pilots observed ash plumes that rose to altitudes of 2.7-3 km (9,000-10,000 ft) a.s.l., and traveled SE, S, and vertically, respectively. JMA reported that seven explosions at Showa Crater were detected during 9-12 August and ejected tephra as far as 800 m. A 50-minute-long eruption on 9 August generated an ash plume that rose 3.5 km above the crater.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Chirinkotan
Based on analysis of satellite images, SVERT reported that a thermal anomaly and gas-and-steam emissions from Chirinkotan were observed on 5 and 9 August. A thermal anomaly was visible on 7 August, and possible gas-and-steam emissions were observed on 7 and 8 August. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Chirpoi
SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images during 5-7 and 9 August, and possibly during 10-11 August. Steam-and-gas emissions were detected on 9 August. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Kilauea
During 7-13 August HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. The lake level rose during the week; the level was 49 m below the Halema'uma'u crater floor on 7 August and 37-39 m below the floor during 10-12 August. The level rose to 48 m below the floor during 12-13 August.

At Pu'u 'O'o Crater, glow emanated from spatter cones on the N and S portions of the crater floor. The Kahauale’a 2 lava flow, fed by the NE spatter cone, was active with scattered break-out flows and burned forest N of Pu'u 'O'o. Peace Day activity, fed by lava tubes extending from Pu'u 'O'o, consisted of some breakout activity on the pali and coastal plain, and an ocean entry outside of the National Park boundary to the E.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Kizimen
KVERT reported that during 2-9 August moderate seismic activity continued at Kizimen. Video and satellite data showed that lava continued to extrude from the summit, producing incandescence, strong gas-and-steam activity, and hot avalanches on the W and E flanks. A thermal anomaly was detected in satellite images during 2-6 August; cloud cover obscured views on the other days. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Pacaya
INSIVUMEH reported that during 7-8 August white vapor plumes rose 200 m above Pacaya and drifted E. On 9 August seismicity increased, and Strombolian explosions ejected tephra 200 m above MacKenney Crater and onto the flanks, 400 m away from crater. The next day the number and magnitudes of explosions increased, and seismic signals indicating fluid movement were recorded. Tephra was again ejected 400 m away from MacKenney Crater, causing small avalanches of volcanic material on the flanks. On 12 August fumarolic plumes rose 50 m. Cloud cover prevented observations of the crater on 13 August; however, the seismic network recorded a few gas explosions and tremor.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Pavlof
On 8 August AVO reported that no lava or ash emissions had been observed at Pavlof since 26 June and the volcano exhibited gradually declining levels of unrest. Seismicity was at background levels. AVO lowered the Aviation Color Code to Green and the Volcano Alert Level to Normal.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Reventador
IG reported that during 7-8 August explosions at Reventador ejected incandescent material onto the SW flank. Steam emissions were observed on 8 and 9 August, and on 10 August they contained ash and rose 1 km above the crater. Cloud cover prevented observations during 11-13 August; roaring was reported on 13 August.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Santa Maria
INSIVUMEH reported that two explosions on 7 August from Santa María's Santiaguito lava-dome complex were followed by white plumes that rose 500 m. Pyroclastic material descended the E, S, and SW flanks. Fumarolic plumes rose 100 m on 8 August. On 10 August white plumes rose 250 m. An explosion at 0624 generated an ash plume that rose 900 m and drifted SW, causing ashfall in Monte Claro (S). Heavy rainfall on 11 August caused a lahar in the San Isidro-Tambor River, a tributary of Samala River, which was 30 m wide, 1.5 m thick, and carried branches, tree trunks, and blocks up to 1.5 m in diameter. A few explosions on 13 August generated ash plumes that rose 1 km and drifted 10 km WSW.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
Based on visual observations and analyses of satellite data, KVERT reported that during 2-9 August a viscous lava flow effused on the NW flank of Shiveluch's lava dome, accompanied by hot avalanches, incandescence, and fumarolic activity. Satellite images detected a thermal anomaly during 3-6, 8, and 10-11 August. Explosions during 4-5 August generated ash plumes that rose to altitudes of 5-7 km (16,400-23,000 ft) a.s.l. and drifted SSE. A video camera recorded ash plumes that rose to altitudes of 7-7.5 km (23,000-24,600 ft) a.s.l. during 10-11 August. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Tolbachik
KVERT reported that the S fissure along the W side of Tolbachinsky Dol, a lava plateau on the SW side of Tolbachik, continued to produce very fluid lava flows during 2-9 August that traveled to the W, S, and E sides of the plateau. Cinder cones continued to grow along the S fissure and weak gas-and-steam plumes were observed. A thermal anomaly on the N part of Tolbachinsky Dol was visible daily in satellite imagery. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Veniaminof
AVO reported that during 7-11 August seismicity at Veniaminof remained above background levels. Cloud cover obscured views of the cinder cone inside the caldera during 7-8 August. Slightly elevated surface temperatures, consistent with cooling lava flows, were detected in partly cloudy satellite images during 9-10 August. On 11 August cloud cover prevented satellite image views, and web-camera views showed nothing significant. During 11-12 August seismic tremor increased and persistent elevated surface temperatures, consistent with lava effusion, were visible in satellite imagery. The web camera in Perryville (32 km SSE) recorded intermittent steam-and-ash plumes; one on 12 August rose 3.7 km (12,000 ft) a.s.l. and drifted W. Seismic tremor has remained high on 13 August. The Volcano Alert Level remained at Watch and the Aviation Color code remained at Orange.
Source: US Geological Survey Alaska Volcano Observatory (AVO)