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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 18 February-24 February 2009
Name Location Eruption Start Date Report Status
Chaiten Southern Chile New
Galeras Colombia New
Redoubt Alaska Peninsula New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Barren Island Andaman Islands (India) Continuing
Fuego South-Central Guatemala 2002 Jan 4 Continuing
Guagua Pichincha Ecuador Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
Rabaul New Britain (Papua New Guinea) Continuing
Santa Maria Southwestern Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Soufriere Hills Montserrat Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Tungurahua Ecuador Continuing
Ubinas Peru 2023 Jun 22 Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,850 individual reports over 1,208 weeks (average of 16 per week) on 332 different volcanoes.

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Agung Cuicocha Iliwerung Llaima Popocatepetl Sumbing
Ahyi Cumbal Inielika Lokon-Empung Purace Sundoro
Aira Dabbahu Ioto Lonquimay Puyehue-Cordon Caulle Suretamatai
Akan Davidof Irazu Lopevi Rabaul Suwanosejima
Alaid Dempo Iya Machin Raikoke Taal
Alu-Dalafilla Descabezado Grande Izu-Torishima Makushin Ranakah Tair, Jebel at
Ambae Dieng Volcanic Complex Jackson Segment Maly Semyachik Raoul Island Takawangha
Ambang Dukono Kaba Manam Rasshua Talang
Ambrym East Epi Kadovar Manda Hararo Raung Tambora
Anatahan Ebeko Kaitoku Seamount Marapi Redoubt Tanaga
Aniakchak Ebulobo Kama'ehuakanaloa Maroa Reventador Tandikat-Singgalang
Antillanca Volcanic Complex Edgecumbe Kambalny Martin Reykjanes Tangkoko-Duasudara
Antuco Egon Kanaga Masaya Rincon de la Vieja Tangkuban Parahu
Apoyeque Ekarma Kanlaon Maule, Laguna del Rinjani Tara, Batu
Arenal Eldey Karangetang Mauna Loa Ritter Island Ta'u
Asamayama Erebus Karkar Mayon Rotorua Taupo
Askja Erta Ale Karthala McDonald Islands Ruang Telica
Asosan Etna Karymsky Melimoyu Ruapehu Tenerife
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Kasatochi Merapi Ruby Tengger Caldera
Augustine Eyjafjallajokull Katla Midagahara Ruiz, Nevado del Three Sisters
Avachinsky Fagradalsfjall Katmai Misti, El Sabancaya Tinakula
Awu Fernandina Kavachi Miyakejima Sakar Tofua
Axial Seamount Fogo Kelimutu Momotombo Salak Tokachidake
Azul, Cerro Fonualei Kelud Monowai San Cristobal Tolbachik
Azumayama Fournaise, Piton de la Kerinci Montagu Island San Miguel Toliman
Bagana Fourpeaked Ketoi Moyorodake [Medvezhia] San Vicente Tongariro
Balbi Fuego Kharimkotan Mutnovsky Sangay Trident
Bamus Fujisan Kick 'em Jenny Myojinsho Sangeang Api Tungurahua
Banda Api Fukutoku-Oka-no-Ba Kie Besi Nabro Santa Ana Turrialba
Bardarbunga Galeras Kikai Negra, Sierra Santa Maria Ubinas
Barren Island Galunggung Kilauea Negro, Cerro Sao Jorge Ugashik-Peulik
Batur Gamalama Kirishimayama Nightingale Island Sarigan Ukinrek Maars
Bezymianny Gamkonora Kita-Ioto Nishinoshima Sarychev Peak Ulawun
Bogoslof Gareloi Kizimen Nisyros Saunders Unnamed
Brava Gaua Klyuchevskoy Novarupta Savo Unnamed
Bristol Island Gorely Kolokol Group NW Rota-1 Semeru Veniaminof
Bulusan Great Sitkin Koryaksky Nyamulagira Semisopochnoi Villarrica
Calbuco Grimsvotn Krakatau Nyiragongo Seulawah Agam Vulcano
Callaqui Guagua Pichincha Krummel-Garbuna-Welcker Ofu-Olosega Sheveluch West Mata
Cameroon Guallatiri Krysuvik-Trolladyngja Okataina Shishaldin Westdahl
Campi Flegrei del Mar di Sicilia Guntur Kuchinoerabujima Okmok Simbo Whakaari/White Island
Cayambe Hachijojima Kurikomayama Ontakesan Sinabung Witori
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Oraefajokull Sinarka Wolf
Chaiten Heard Kverkfjoll Osorno Siple Wrangell
Chiginagak Hekla La Palma Pacaya Sirung Yakedake
Chikurachki Helgrindur Lamington Pagan Slamet Yasur
Chiles-Cerro Negro Hierro Lamongan Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chillan, Nevados de Hokkaido-Komagatake Langila Paluweh Soputan Zaozan [Zaosan]
Chirinkotan Home Reef Lanin Panarea Sorikmarapi Zavodovski
Chirpoi Hood Lascar Papandayan Sotara Zhupanovsky
Ciremai Huaynaputina Late Parker Soufriere Hills Zubair Group
Cleveland Hudson, Cerro Lateiki Pavlof Soufriere St. Vincent
Colima Huila, Nevado del Lengai, Ol Doinyo Pelee South Sarigan Seamount
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Peuet Sague Spurr
Concepcion Ibu Lewotobi Pinatubo St. Helens
Copahue Ijen Lewotolok Planchon-Peteroa Stromboli
Cotopaxi Iliamna Little Sitkin Poas Sulu Range
 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 Chaiten
SERNAGEOMIN reported that on 19 February a partial lava-dome collapse of the S flank of Chaitén's Domo Nuevo 1 and Domo Nuevo 2 lava-dome complex generated lateral explosions, block-and-ash flows, and pyroclastic flows. A pyroclastic flow traveled S down the Chaitén (Blanco) River valley, stopping within about 5 km of Chaitén town (10 km SW). Ash plumes rose to an altitude of 9.1 km (30,000 ft) a.s.l. and drifted W and SE. Ash fell in Futaleufú (about 65 km ESE), and, according to ONEMI, accumulated to thicknesses of 3-5 mm. Overflights revealed that the tree leaves in a forest near the S flank were burned and steam rose from new deposits in the Chaitén River valley. Ash-and-steam plumes rose to altitudes of 7.1-9.1 km (23,300-30,000 ft) a.s.l. A 500 x 500 m scar from the partial dome collapse was seen on the S flank. Seismicity decreased to pre-collapse levels by the afternoon. The steaming from pyroclastic flow deposits was again seen in the channel and on the shores of the Chaitén River valley during an overflight the next day, but had greatly decreased by 21 February. Using photos taken during 19 and 20 February overflights, scientists estimated that 10 million cubic meters of material was removed from the S flank of the dome complex. According to a news article, about 200 people were living in Chaitén town on 19 February. ONEMI reported that many of those people self-evacuated, but about 46 people remained in the town, refusing to leave. On 23 February, lahars traveled down river valleys and an off-white plume was seen on the web camera rising about 1 km above the lava domes.

Based on SIGMET notices, analysis of satellite imagery, and web camera views, the Buenos Aires VAAC reported that during 23-24 February ash plumes rose to altitudes 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted NE and E.
Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI), Patagonia Times, Servicio Nacional de Geología y Minería (SERNAGEOMIN), Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Galeras
INGEOMINAS reported an explosive eruption from Galeras that began at 0705 on 20 February; the Alert Level was raised from II (Orange; "probable eruption in term of days or weeks") to I (Red; "imminent eruption or in progress"), on a scale of 4-1. The eruption was accompanied by shock waves detected in several local communities and produced sounds heard in Popayán (about 160 km NNE). Observers from areas on the E flank reported two explosions, incandescent blocks ejected above the summit, ash emissions, and sulfur gas odor. An ash plume rose to an altitude of 12.5 km (41,000 ft) a.s.l. and drifted E, W, and N. Ashfall was reported in areas to the W. Gas plumes with a low ash content continued, especially in the afternoon, and rose 700 m above the summit. On 21 February, the Alert Level was lowered to back to II. During 22-24 February, occasional steam plumes rose 500 m above the summit and drifted NNW.
Source: Servicio Geológico Colombiano (SGC)
Report for Redoubt
AVO reported that during 18-24 February seismic activity at Redoubt was variable but remained elevated above background levels. Web camera views and satellite imagery showed no unusual activity; steam plumes within the summit crater were seen on the web camera on 23 and 24 February.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Aira
JMA lowered the Alert Level for Sakura-jima from 3 to 2 (on a scale of 1-5) on 19 February because deformation was absent, seismicity was low, and no eruptions occurred after 5 February. Based on information from JMA, the Tokyo VAAC reported that on 22 February an explosion produced a plume that rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted N.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Barren Island
Based on analysis of satellite imagery, the Darwin VAAC reported that during 20-21 February ash plumes from Barren Island rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted about 75-90 km WNW, NW, and N.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Fuego
Based on analysis of satellite imagery, the Washington VAAC reported that on 18 February ash plumes from Fuego rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted WSW. On 20 and 24 February, INSIVUMEH reported that explosions produced ash plumes that rose to altitudes of 4.1-4.7 km (13,500-15,400 ft) a.s.l. and drifted 6-8 km SW. Some explosions produced rumbling sounds and shock waves. Incandescent material was ejected 150 m above the crater. Incandescent avalanches of blocks traveled down the W and SW flanks.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Report for Guagua Pichincha
The IG reported four moderate phreatic explosions from Guagua Pichincha were detected by the seismic network during 16-17 February, following a few days of slightly increased seismicity and rainfall. IG recommended that visitors stay out of the caldera.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Karymsky
KVERT reported that during 13-20 January seismic data from Karymsky was unavailable and clouds prevented satellite image observations. The Level of Concern Color Code remained at Orange. Based on information from KEMSD and observations of satellite imagery, the Tokyo VAAC reported that during 21-22 February eruptions produced plumes that rose to altitudes of 3-4.3 km (10,000-14,000 ft) a.s.l.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Kilauea
HVO reported that during 18-24 February lava flowed SE from underneath Kilauea's Thanksgiving Eve Breakout (TEB) and rootless shield complex through a lava tube system, reaching the Waikupanaha ocean entry and occasionally producing explosions. On 17 February, four large explosions that accompanied a collapse of the Waikupanaha bench ejected rocks and spatter 275 m inland. Lava also entered the ocean at Waha'ula during 18-20 February, and at a second point further E, named Poupou, starting on 18 February. Incandescence originated from the Prince lobe on 20 February. Thermal anomalies noted on the coastal plain suggested surface flows.

The vent in Halema'uma'u crater continued to produce a predominantly white plume that drifted mainly SW; incandescence was intermittently seen from the vent. Small amounts of ejected tephra, including Pele's hair and some spatter, were routinely collected. Geologists utilizing an infrared imager during an overflight on 20 February saw a small, hot degassing vent deep below the vent rim. The sulfur dioxide emission rate at the summit was 1,400, 1,500, 1,300, and 900 tonnes per day on 17, 18, 19, and 20 February, respectively; the 2003-2007 average rate was 140 tonnes per day.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Popocatepetl
CENAPRED reported that emissions of steam and gas from Popocatépetl were visible during 18-24 February; the plumes occasionally contained slight amounts of ash.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for Rabaul
Based on analysis of satellite imagery, the Darwin VAAC reported that during 22-23 February ash plumes from Rabaul caldera's Tavurvur cone rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted S, W, and NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Santa Maria
Based on analysis of satellite imagery, the Washington VAAC reported that on 18 February a dense ash plume from Santa María's Santiaguito lava dome complex drifted W. On 20 February, INSIVUMEH reported that an explosion produced an ash plume that rose to an altitude of 3.2 km (10,500 ft) a.s.l. and drifted E. On 24 February, an explosion produced a white plume that rose 500 m above the summit and drifted SW. Incandescence was seen SW of Caliente dome.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was at background levels during 13-20 February. Based on interpretations of seismic data, ash plumes likely rose to an altitude of 4.6 km (15,100 ft) a.s.l. Lava flows continued to be active on the S and N flanks. Fumarolic activity was seen during 12-13 and 19 February. Analysis of satellite imagery revealed a daily thermal anomaly on the lava dome and an ash plume that drifted 31 km NW on 17 February. The Level of Concern Color Code remained at Orange.

Based on information from KEMSD and analysis of satellite imagery, the Tokyo VAAC reported that an eruption on 18 February produced a plume that rose to an altitude of 4.9 km (16,000 ft) a.s.l.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Soufriere Hills
MVO reported that during 13-20 February activity from the Soufrière Hills lava dome was at a low level. Four rockfalls were detected and seismicity had increased slightly compared to previous weeks. On 16 February, heavy rainfall triggered a small pyroclastic flow on the N side of the lava dome and a substantial lahar NW in the Belham River. A thermal camera showed a large amount of steaming in the Dyer's area (NW) during this period, and occasionally for a few days after. The Hazard Level was lowered to 3 on 19 February.
Source: Montserrat Volcano Observatory (MVO)
Report for Suwanosejima
JMA reported that Suwanose-jima erupted explosively on 18 February; a colored plume rose 400 m above the crater and drifted E. Two explosive eruptions occurred the next day. Based on information from JMA, the Tokyo VAAC reported explosions on 20 and 21 February. Details of possible resultant ash plumes were not reported.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
The IG reported that, although cloud cover occasionally prevented visual observation during 18-24 February, ash plumes from Tungurahua were seen and rose to altitudes of 6-8 km (19,700-26,200 ft) a.s.l. The plumes drifted mainly W and NW. Ashfall was reported almost daily and was noted in areas to the SW, W, and NW. Blocks were often seen or heard rolling down the flanks, and roaring or explosion noises were noted. On 18 February, incandescence in the crater was seen and a lahar traveled down a drainage to the W. Strombolian activity at the summit was observed during 19-20 and 22-23 February.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Ubinas
Based on a SIGMET notice and a pilot observation, the Buenos Aires VAAC reported that on 23 February an ash plume from Ubinas rose to altitudes of 6.2-7.6 km (20,500-25,000 ft) a.s.l. and drifted S. Ash was not seen on satellite imagery.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)