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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 11 July-17 July 2001
Name Country Volcanic Region Eruption Start Date Report Status
Karangetang Indonesia Sangihe Volcanic Arc New
Etna Italy Sicily Volcanic Province 2022 Nov 27 Continuing
Ijen Indonesia Sunda Volcanic Arc Continuing
Kilauea United States Hawaiian-Emperor Hotspot Volcano Group 2024 Dec 23 Continuing
Mayon Philippines Eastern Philippine Volcanic Arc Continuing
Merapi Indonesia Sunda Volcanic Arc 2020 Dec 31 Continuing
Popocatepetl Mexico Trans-Mexican Volcanic Arc 2005 Jan 9 Continuing
Semeru Indonesia Sunda Volcanic Arc 2017 Jun 6 Continuing
Sheveluch Russia Eastern Kamchatka Volcanic Arc 1999 Aug 15 Continuing
Soufriere Hills United Kingdom Lesser Antilles Volcanic Arc Continuing
Tungurahua Ecuador Northern Andean Volcanic Arc Continuing
Ulawun Papua New Guinea Bismarck Volcanic Arc Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,940 individual reports over 1,257 weeks (average of 17 per week) on 340 different volcanoes.

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Use the dropdowns to choose the year and week for archived Weekly Reports.

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Adams Cotopaxi Iliamna Lewotolok Planchon-Peteroa Sulu Range
Agung Cuicocha Iliwerung Little Sitkin Poas Sumbing
Ahyi Cumbal Inielika Llaima Popocatepetl Sumisujima
Aira Dabbahu Ioto Lokon-Empung Purace Sundoro
Akan Davidof Irazu Lonquimay Puyehue-Cordon Caulle Suoh
Alaid Dempo Iwatesan Lopevi Rabaul Suretamatai
Alu-Dalafilla Descabezado Grande Iya Machin Raikoke Suwanosejima
Ambae Dieng Volcanic Complex Izu-Torishima Makushin Ranakah Taal
Ambang Dukono Jackson Segment Maly Semyachik Raoul Island Tair, Jebel at
Ambrym East Epi Kaba Manam Rasshua Takawangha
Anatahan Ebeko Kadovar Manda Hararo Raung Talang
Aniakchak Ebulobo Kaitoku Seamount Marapi Redoubt Tambora
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Maroa Reventador Tanaga
Antuco Egon Kambalny Martin Reykjanes Tandikat-Singgalang
Apoyeque Ekarma Kanaga Masaya Rincon de la Vieja Tangkoko-Duasudara
Arenal Eldey Kanlaon Matthew Island Rinjani Tangkuban Parahu
Asamayama Erebus Karangetang Maule, Laguna del Ritter Island Tara, Batu
Askja Erta Ale Karkar Mauna Loa Rotorua Ta'u
Asosan Etna Karthala Mayon Ruang Taupo
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky McDonald Islands Ruapehu Telica
Augustine Eyjafjallajokull Kasatochi Melebingoy Ruby Tenerife
Avachinsky Fagradalsfjall Katla Melimoyu Ruiz, Nevado del Tengger Caldera
Awu Fentale Katmai Merapi Sabancaya Three Sisters
Axial Seamount Fernandina Kavachi Midagahara Sakar Tinakula
Azul, Cerro Fogo Kelimutu Misti, El Salak Tofua
Azumayama Fonualei Kelud Miyakejima San Cristobal Tokachidake
Bagana Fournaise, Piton de la Kerinci Momotombo San Miguel Tolbachik
Balbi Fourpeaked Ketoi Monowai San Vicente Toliman
Bamus Fuego Kharimkotan Montagu Island Sangay Tongariro
Banda Api Fujisan Kick 'em Jenny Moyorodake [Medvezhia] Sangeang Api Trident
Bardarbunga Fukutoku-Oka-no-Ba Kie Besi Mutnovsky Santa Ana Tungurahua
Barren Island Galeras Kikai Myojinsho Santa Maria Turrialba
Batur Galunggung Kilauea Nabro Sao Jorge Ubinas
Bezymianny Gamalama Kirishimayama Negra, Sierra Sarigan Ugashik-Peulik
Bogoslof Gamkonora Kita-Ioto Negro, Cerro Sarychev Peak Ukinrek Maars
Brava Gareloi Kizimen Nightingale Island Saunders Ulawun
Bristol Island Gaua Klyuchevskoy Nishinoshima Savo Unnamed
Bulusan Gorely Kolokol Group Nisyros Semeru Unnamed
Calbuco Great Sitkin Kolumbo Novarupta Semisopochnoi Veniaminof
Callaqui Grimsvotn Koryaksky NW Rota-1 Seulawah Agam Villarrica
Cameroon Guagua Pichincha Krakatau Nyamulagira Sheveluch Vulcano
Campi Flegrei Guallatiri Krummel-Garbuna-Welcker Nyiragongo Shishaldin West Mata
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Ofu-Olosega Simbo Westdahl
Cayambe Hachijojima Kuchinoerabujima Okataina Sinabung Whakaari/White Island
Chachadake [Tiatia] Hakoneyama Kurikomayama Okmok Sinarka Witori
Chaiten Heard Kusatsu-Shiranesan Ontakesan Siple Wolf
Chiginagak Hekla Kverkfjoll Oraefajokull Sirung Wrangell
Chikurachki Helgrindur La Palma Osorno Slamet Yakedake
Chiles-Cerro Negro Hierro Lamington Pacaya Snaefellsjokull Yasur
Chillan, Nevados de Hokkaido-Komagatake Lamongan Pagan Soputan Yellowstone
Chirinkotan Home Reef Langila Palena Volcanic Group Sorikmarapi Yufu-Tsurumi
Chirpoi Hood Lanin Paluweh Sotara Zaozan [Zaosan]
Ciremai Huaynaputina Lascar Panarea Soufriere Hills Zavodovski
Cleveland Hudson, Cerro Late Papandayan Soufriere St. Vincent Zhupanovsky
Colima Huila, Nevado del Lateiki Pavlof South Sarigan Seamount Zubair Group
Colo Hunga Tonga-Hunga Ha'apai Lengai, Ol Doinyo Pelee Spurr
Concepcion Ibu Leroboleng Peuet Sague St. Helens
Copahue Ijen Lewotobi Pinatubo Stromboli
 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 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 Karangetang
After eruptions occurred on 25 and 29 June, volcanic activity continued at high levels at Karangetang. During 30 June to 8 July seismographs recorded signals that represented small explosions, avalanches, and an average of 33 multiphase earthquakes per day. During this period a gray plume was emitted from the volcano, and lava avalanches traveled as far as 2.5 km down the Keting River and 750 m down the Kahetang River. The volcano is at Alert Level 3 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Etna
On 13 July the 16th eruptive episode in 2001 took place at the NNE vent of Etna's Southeast Crater. During the 4-hour-long episode, lava flows, Strombolian activity, and several earthquakes occurred. The largest two earthquakes had magnitudes of 3.9 and were felt 15 km away in the town of Nicolosi. The Toulouse VAAC reported that a small ash cloud was visible on the Sistema Poseidon Etna webcam and on satellite imagery. It did not rise above 3.7 km a.s.l.
Sources: Toulouse Volcanic Ash Advisory Centre (VAAC), Associated Press, Etna Volcan Sicilien (Charles Rivière), Sezione di Catania - Osservatorio Etneo (INGV)
Report for Ijen
The Darwin VAAC reported that at 0120 on 15 July sulfur fumes entered the cabin of an aircraft flying from Singapore to Denpasar. At the time, the aircraft was flying at an altitude of ~2.4 km a.s.l. ~15 km SE of Ijen. VSI stated that earlier, during 2-8 July, seismic and explosive activity had increased and the Alert Level had been raised from 1 to 2 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kilauea
At Kilauea small surface lava flows traveled along the E and W branches of the lava flow field active during the last 6 months and moderate amounts of lava entered the sea at the E Kupapa`u entry. Generally, weak, steady tremor and related long-period earthquakes continued beneath Kilauea's caldera. Near Pu`u `O`o, the tremor alternated from weak, to moderate, to strong over periods of several hours. Elsewhere, seismicity was at normal levels. Tiltmeters in the summit area and along the east rift zone indicated no significant deformation.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Mayon
Volcanic activity continued to decrease at Mayon during 8-16 July, with low seismicity, occasional SE-directed rockfalls, and a general decrease in SO2 emission rates. Although the volcano's edifice remained slightly inflated, a gradual deflationary trend was detected. The activity decrease led PHIVOLCS to reduce the Alert level from 4 (hazardous eruption imminent) to 3 (increased tendency towards eruption). Authorities removed the 7-km-radius Extended Danger Zone in the SE, but left the 6-km-radius Permanent Danger Zone in effect on a long-term basis.
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Report for Merapi
During 2-8 July low-pressure emissions from fumaroles rose 700 m above the volcano. During the same interval lava avalanches traveled SW to a maximum distance of 2.5 km into the upper reaches of the Sat, Senowo, and Lamat rivers. The volcano was at Alert Level 2.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Popocatepetl
Several small-to-moderate sized emissions occurred at Popocatépetl, including three on 14 July. According to the Washington VAAC, around 1045 an emission of steam, gas, and small amounts of ash rose to ~7.3 km a.s.l. and drifted to the W. Emissions also occurred at 2303 and 2341. A cloud from the latter emission rose to ~6.1 km a.s.l. and drifted to the W.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC), Associated Press
Report for Semeru
Seismic data revealed that during 2-8 July the number of explosions and avalanche earthquakes at Semeru decreased in comparison to the previous week. The volcano was at Alert Level 2.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Sheveluch
Seismic activity remained above background levels during 6-13 July. Many small earthquakes were recorded within the volcano's edifice, along with weak spasmodic tremor and other local seismic signals, interpreted as related to explosions, avalanches, and collapses. On 6 July explosions sent ash to 0.6-1 km above the volcano. In addition, hot avalanches and pyroclastic flows were observed during clear conditions to be traveling down the flanks of the volcano. The Concern Color Code remained at Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
During 6 to 13 July volcanic activity at Soufrière Hills remained similar to the previous week. Lava dome growth appeared to still be concentrated on the S side of the dome where near-continuous rockfalls occurred. According to the Washington VAAC, the rockfalls produced ash plumes that did not rise above 3 km a.s.l. and drifted to the W or WNW. An occasional hot spot was visible on satellite imagery.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
During the week several small-to-moderate eruptions produced ash clouds. The largest eruption, on 12 July, produced an ash cloud that rose to ~8.3 km a.s.l. and drifted W to NW.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Washington Volcanic Ash Advisory Center (VAAC)
Report for Ulawun
A news report on 9 July stated that residents who were evacuated from their homes near Ulawun were permitted to return home. They were evacuated in May after the occurrence of relatively high seismic activity and an eruption in April. On 14 June, almost a month before the news report was published, the Rabaul Volcano Observatory (RVO) recommended that the Alert Level be reduced to 1. At this stage of alert people could move back to their homes with the approval of the local disaster committee, but many residents were hesitant to return and opted to stay in care centers. After the aforementioned news article was published some people returned home and RVO expects more people to return to their villages in the coming weeks.
Sources: The National, Rabaul Volcano Observatory (RVO)