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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 9 May-15 May 2001
Name Location Eruption Start Date Report Status
Erebus Ross Island 1972 Dec 16 (in or before) ± 15 days New
Etna Sicily (Italy) 2022 Nov 27 New
Mayon Luzon (Philippines) New
Okmok Fox Islands (USA) New
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 New
Cleveland Chuginadak Island (USA) Continuing
Kilauea Hawaiian Islands (USA) 2021 Sep 29 Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat 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 18,613 individual reports over 1,152 weeks (average of 16 per week) on 329 different volcanoes.

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

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


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



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

 Criteria & Disclaimers

Criteria



The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:

- A volcano observatory raises or lowers the alert level at the volcano.
- A volcanic ash advisory has been released by a volcanic ash advisory center (VAAC) stating that an ash cloud has been produced from the volcano.
- A verifiable news report of new activity or a change in activity at the volcano has been issued.
- Observers have reported a significant change in volcanic activity. Such activity can include, but is not restricted to, pyroclastic flows, lahars, lava flows, dome collapse, or increased unrest.

Volcanoes are included in the "New Activity/Unrest" section of the Weekly Volcanic Activity Report if the activity occurs after at least 3 months of quiescence. Once a volcano is included in the "New Activity/Unrest" section, updates will remain in that section unless the activity continues for more than 1 month without escalating, after which time updates will be listed in the "Continuing Activity" section. Volcanoes are also included in the "New Activity/Unrest" section if the volcano is undergoing a period of relatively high unrest, or increasing unrest. This is commonly equal to Alert Level Orange on a scale of Green, Yellow, Orange, Red, where Red is the highest alert. Or alert level 3 on a scale of 1-4 or 1-5.

It is important to note that volcanic activity meeting one or more of these criteria may occur during the week, but may not be included in the Weekly Volcanic Activity Report because we did not receive a report.

Disclaimers



1. The Weekly Volcanic Activity Report is intended to provide timely information about global volcanism on a weekly basis. Consequently, the report is generated rapidly by summarizing volcanic reports from various sources, with little time for fact checking. The accuracy of the Weekly Volcanic Activity Report is dependent upon the quality of the volcanic activity reports we receive. Reports published in the Bulletin of the Global Volcanism Network are cover longer time periods and are more carefully reviewed, although all of the volcanoes discussed in the Weekly Volcanic Activity Report are not necessarily reported in the Bulletin. Because of our emphasis on rapid reporting on the web we have avoided diacritical marks. Reports are updated on the Weekly Volcanic Activity Report web page as they are received, therefore information may be included regarding events that occurred before the current report period.

2. Rapidly developing events lead to coverage that is often fragmentary. Volcanoes, their eruptions, and their plumes and associated atmospheric effects are complex phenomena that may require months to years of data analysis in order to create a comprehensive summary and interpretation of events.

3. Preliminary accounts sometimes contain exaggerations and "false alarms," and accordingly, this report may include some events ultimately found to be erroneous or misleading.

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

5. USGS Disclaimer Statement for this Website:

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

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

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

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

 Acronyms and Abbreviations

a.s.l. - above sea level

AVO - Alaska Volcano Observatory

AVHRR - Advanced Very High Resolution Radiometer

CENAPRED - Centro Nacionale de Prevencion de Desastres (México)

CONRED - Coordinadora Nacional para la Reducción de Desastres

COSPEC - Correlation Spectrometer

CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation

CVO - Cascades Volcano Observatory (USGS)

GMS - Geostationary Meteorological Satellite

GOES - Geostationary Operational Environmental Satellite

GVO - Goma Volcano Observatory

GVP - Global Volcanism Program (Smithsonian Institution)

HVO - Hawaiian Volcano Observatory (USGS)

ICE - Instituto Costarricense de Electricidad (Costa Rica)

IG - Instituto Geofísico (Ecuador)

IGNS - Institute of Geological and Nuclear Sciences (New Zealand) - now GNS Science

INETER - Instituto Nicaragüense de Estudios Territoriales (Nicaragua)

INGEMMET - Instituto Geológical Minero y Metalúrgico (Peru)

INGEOMINAS - Instituto Colombiano de Geología y Minería (Colombia)

INGV-CT - Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania (Italy)

INSIVUMEH - Instituto Nacional de Sismologia, Vulcanologia, Meteorologia e Hidrologia (Guatemala)

IRD - Institut de Recherche pour le Développement (France)

JMA - Japanese Meteorological Agency

KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department

KVERT - Kamchatkan Volcanic Eruption Response Team

M - magnitude

METEOSAT - Meteorological Satellite

MEVO - Mount Erebus Volcano Observatory

MODIS - Moderate Resolution Imaging Spectroradiometer

MVO - Montserrat Volcano Observatory

MWO - Meteorological Watch Office

NEIC - National Earthquake Information Center

NIED - National Research Institute for Earth Science and Disaster Prevention (Japan)

NOAA - National Oceanic and Atmospheric Administration

NOTAM - Notice to Airmen

OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)

OFDA - Office of US Foreign Disaster Assistance

ONEMI - Oficina Nacional de Emergencia - Ministerio del Interior (Chile)

OVPDLF - Observatoire Volcanologique du Piton de la Fournaise (France)

OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)

PHIVOLCS - Philippine Institute of Volcanology and Seismology (Philippines)

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geologia y Mineria (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Russia)

USAID - US Agency for International Development

USGS - United States Geological Survey

UTC - Coordinated Universal Time

VAAC - Volcanic Ash Advisory Center

VAFTAD - Volcanic Ash Forecast Transport And Dispersion

VDAP - Volcano Disaster Assistance Program (USGS)

VHP - Volcano Hazards Program (USGS)

VRC - Volcano Research Center (Japan)

Report for Erebus
Geologic Summary. Mount Erebus, the world's southernmost historically active volcano, overlooks the McMurdo research station on Ross Island. The 3,794-m-high Erebus is the largest of three major volcanoes forming the crudely triangular Ross Island. The summit of Mount Erebus has been modified by several generations of caldera formation. A summit plateau at about 3,200 m altitude marks the rim of the youngest caldera, within which the modern cone was constructed. An elliptical 500 x 600 m wide, 110-m-deep crater truncates the summit and contains an active lava lake within a 250-m-wide, 100-m-deep inner crater. The glacier-covered volcano was erupting when first sighted by Captain James Ross in 1841. Continuous lava-lake activity has been documented since 1972, punctuated by occasional Strombolian explosions that eject bombs onto the crater rim.
Source: Mount Erebus Volcano Observatory
Report for Etna
The Italy's Volcanoes website reported that after more than 8 months of minor activity (slow lava flows, degassing, light ash emission, and low-level Strombolian activity), a new episode of vigorous volcanic activity began at Southeast Crater on 9 May. On 6 May active lava flows and explosions were observed launching pyroclasts and lithics onto the volcano's S flank every 7-10 seconds. On 9 May an obvious increase in activity occurred, with Strombolian bursts occurring every few seconds. By 1745 activity further increased and lava fountains rose up to 100 m above the NNE flank fissure while a dense eruption cloud simultaneously rose above the summit vent. Local press sources reported that air traffic was rerouted during the activity. The high level of activity continued at Southeast Crater through at least 14 May and strong degassing occurred at Bocca Nuova crater.
Sources: Italy's Volcanoes, Etna Volcan Sicilien (Charles Rivière)
Report for Mayon
Volcanic activity increased at Mayon, with a lava dome collapse occurring on 13 May. On 12 May seismographs detected a series of explosions at Mayon's summit crater. The following day the SE-facing portion of the lava dome partially collapsed, leaving a V-shaped opening in the dome. The collapse produced small lava avalanches that reached a maximum runout distance of 300 m down the Bonga Gully. After the collapse, incandescence was observed at the dome and lava fragments fell into the gully. Seismic activity indicated frequent earthquakes, tremor, and explosions. On 14 May rockfalls dominated the seismicity. On 15 May there was a lull in activity, with no rockfalls or lava avalanches occurring. Alert Level 3 remained in effect, prohibiting entry within the 6-km-radius permanent danger zone. PHIVOLCS warned that lava flows and/or pyroclastic flows could be produced in the future and residents just outside of the permanent danger zone should be prepared to evacuate at any time.
Sources: Associated Press, Agence France-Presse (AFP), Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Report for Okmok
During ~0800 to at least 1700 on 11 May AVO detected a small earthquake swarm that was centered near Okmok. Earthquakes in the swarm had magnitudes of approximately 2-3.6, but their locations could not be pinpointed because Okmok is not monitored by a local seismic network. AVO noted that the earthquakes may have been of volcanic origin, but earthquake swarms with similar sizes and character are not uncommon at Aleutian arc volcanoes and do not necessarily lead to eruptive activity.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Suwanosejima
Beginning on the morning of 9 May volcanic activity increased at Suwanose-jima when a tremor event commenced. The tremor increased at 1100 and became more violent at 2100. Around noon on 11 May an eruption produced an ash cloud that rose 1-1.5 km above the crater. The Suwanose-jima Branch of Toshima village, ~4 km NNW of the active Otake crater, reported that abundant ash fall was observed in the village on 11 May. Vigorous eruptions on the evening of 12 May and the morning of 13 May deposited up to 3 cm of ash in the village. At 0900 on 14 May the eruption seemed to have stopped. The Sakurajima Volcano Observatory reported that plumes associated with volcanic tremor events have been observed at Suwanose-jima since the new crater was formed during the December 2000 eruption.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Volcano Research Center-Earthquake Research Institute (University of Tokyo)
Report for Cleveland
Cleveland was obscured by clouds during most of the week and no thermal anomalies were observed. AVO had received no reports of significant volcanic activity from pilots, residents, or satellite remote-sensors since the last eruption on 19 March.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Kilauea
Surface lava flows were visible traveling down Pulama Pali. Three ocean-entry benches were seen along the SE corner of the active lava flow field. The active lava flow was 300-500 m from the nearest house in the Royal Gardens subdivision, but the homes may be protected from the lava by a barrier of `a`a deposited in 1983. Volcanic tremor was higher than normal during 12 and 13 May and small earthquakes were recorded in the caldera. 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 Popocatepetl
CENAPRED reported that at 2301 on 13 May a small explosion sent incandescent fragments as far away as 0.5 km from the crater. At 0939 on 14 May an ash-and-steam plume rose 1.5 km above the crater.
Sources: Centro Nacional de Prevencion de Desastres (CENAPRED), Washington Volcanic Ash Advisory Center (VAAC)
Report for Sheveluch
After a pyroclastic-flow producing eruption occurred at ~0958 on 7 May, seismic activity decreased but it remained above background levels for most of the week, a new extrusive dome formed, and the Concern Color Code was reduced. A noticeable increase in seismic activity occurred between 1820 and 1852 on 7 May, and may have corresponded to an explosion that produced an ash-and-gas plume. The plume was visible in satellite imagery rising up to 4 km a.s.l. and drifting ~40 km to the WNW. A small amount of ash fell in the town of Kliuchi, 46 km from the volcano. During 11-15 May seismic activity continued to decrease, but remained above background levels. Many small earthquakes occurred at the volcano's edifice. At 0900 on 12 May a new extrusive lava dome was observed from Kliuchi that was steaming intensely, 100 m high, 200 m wide at the upper part of the dome, and had a volume of ~10 million m3. Observers in Kliuchi reported that by 2140 on 13 May the dome had grown ~50 m higher. Weak explosions produced ash-and-steam plumes that rose up to 1 km above the new dome. On 16 May the Concern Color Code at Shiveluch was reduced from Orange to Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
MVO reported that during 4-11 May volcanic activity increased slightly, with more rockfalls and seismic activity recorded than the previous week and a small pyroclastic flow on 9 May. The pyroclastic flow traveled ~2.5 km S of the dome down the White River. There still appeared to be a very small amount of growth in the S side of the lava dome, and observation flights confirmed that most rockfall activity occurred in the dome's S sector. Sulfur dioxide flux remained low.
Source: Montserrat Volcano Observatory (MVO)
Report for Tungurahua
Heavy rainfall in the vicinity of Tungurahua caused the remobilization of ash deposited on the upper flanks of the volcano, producing several lahars. Lahars traveled down the Cusúa, Basural, Mandur, ún, and Ulba gorges. Lahars caused the closing of the Baños-Riobamba highway and blocked a route to the town of Baños.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)