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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 March-17 March 2009
Name Location Eruption Start Date Report Status
Ebeko Paramushir Island (Russia) 2022 Jun 11 New
Galeras Colombia New
Hunga Tonga-Hunga Ha'apai Tonga Ridge New
Koryaksky Eastern Kamchatka (Russia) New
Redoubt Alaska Peninsula New
Semeru Eastern Java 2017 Jun 6 New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Arenal Costa Rica Continuing
Asamayama Honshu (Japan) Continuing
Batu Tara Komba Island Continuing
Chaiten Southern Chile Continuing
Fuego South-Central Guatemala 2002 Jan 4 Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) Continuing
Nevado del Huila Colombia Continuing
Pacaya South-Central Guatemala Continuing
Rabaul New Britain (Papua New Guinea) Continuing
Santa Maria Southwestern Guatemala 1922 Jun 22 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Tungurahua Ecuador Continuing
Ubinas Peru Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,996 individual reports over 1,215 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 Melebingoy Ruapehu Tenerife
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruby Tengger Caldera
Augustine Eyjafjallajokull Katla Merapi Ruiz, Nevado del Three Sisters
Avachinsky Fagradalsfjall Katmai Midagahara Sabancaya Tinakula
Awu Fernandina Kavachi Misti, El Sakar Tofua
Axial Seamount Fogo Kelimutu Miyakejima Salak Tokachidake
Azul, Cerro Fonualei Kelud Momotombo San Cristobal Tolbachik
Azumayama Fournaise, Piton de la Kerinci Monowai San Miguel Toliman
Bagana Fourpeaked Ketoi Montagu Island San Vicente Tongariro
Balbi Fuego Kharimkotan Moyorodake [Medvezhia] Sangay Trident
Bamus Fujisan Kick 'em Jenny Mutnovsky Sangeang Api Tungurahua
Banda Api Fukutoku-Oka-no-Ba Kie Besi Myojinsho Santa Ana Turrialba
Bardarbunga Galeras Kikai Nabro Santa Maria Ubinas
Barren Island Galunggung Kilauea Negra, Sierra Sao Jorge Ugashik-Peulik
Batur Gamalama Kirishimayama Negro, Cerro Sarigan Ukinrek Maars
Bezymianny Gamkonora Kita-Ioto Nightingale Island Sarychev Peak Ulawun
Bogoslof Gareloi Kizimen Nishinoshima Saunders Unnamed
Brava Gaua Klyuchevskoy Nisyros Savo Unnamed
Bristol Island Gorely Kolokol Group Novarupta Semeru Veniaminof
Bulusan Great Sitkin Koryaksky NW Rota-1 Semisopochnoi Villarrica
Calbuco Grimsvotn Krakatau Nyamulagira Seulawah Agam Vulcano
Callaqui Guagua Pichincha Krummel-Garbuna-Welcker Nyiragongo Sheveluch West Mata
Cameroon Guallatiri Krysuvik-Trolladyngja Ofu-Olosega Shishaldin Westdahl
Campi Flegrei del Mar di Sicilia Guntur Kuchinoerabujima Okataina Simbo Whakaari/White Island
Cayambe Hachijojima Kurikomayama Okmok Sinabung Witori
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Ontakesan Sinarka Wolf
Chaiten Heard Kverkfjoll Oraefajokull Siple Wrangell
Chiginagak Hekla La Palma Osorno Sirung Yakedake
Chikurachki Helgrindur Lamington Pacaya Slamet Yasur
Chiles-Cerro Negro Hierro Lamongan Pagan Snaefellsjokull Yufu-Tsurumi
Chillan, Nevados de Hokkaido-Komagatake Langila Palena Volcanic Group Soputan Zaozan [Zaosan]
Chirinkotan Home Reef Lanin Paluweh Sorikmarapi Zavodovski
Chirpoi Hood Lascar Panarea Sotara Zhupanovsky
Ciremai Huaynaputina Late Papandayan 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 Ebeko
Based on analysis of satellite imagery and information from Yelizovo Airport, the Tokyo VAAC reported that on 13 March an ash plume from Ebeko drifted E at an altitude of 0.6 km (2,000 ft) a.s.l.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Galeras
INGEOMINAS reported an explosive eruption from Galeras that began at 1555 on 13 March; 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. Inclement weather prevented direct observations of the volcano. The Washington Volcanic Ash Advisory Center (VAAC) indicated that a plume rose to an altitude of 12.3 km (40,400 ft) a.s.l. and drifted NW. The eruption produced sounds heard in areas 10 km E and W. Ashfall was reported in multiple areas E and NW; a sulfur odor was also reported in some areas. On 14 March, gas plumes with some ash content rose to an altitude of 6.3 km (20,700 ft) a.s.l. The Alert Level was lowered to back to II.

According to news articles, authorities ordered the evacuation of about 8,000 people living in high-risk areas, but few went to evacuation shelters.
Sources: El Tiempo, Servicio Geológico Colombiano (SGC)
Report for Hunga Tonga-Hunga Ha'apai
Observers flying near the area of Hunga Tonga-Hunga Ha'apai (about 62 km NNW of Nuku'alofa, the capital of Tonga) on 16 or 17 March reported seeing an eruption. Photos showed an eruption plume with a wide base that rose from the sea surface and mixed with meteorological clouds. Based on information from the Tonga airport and analysis of satellite imagery, the Wellington VAAC reported that on 18 March, a plume rose to altitudes of 4.6-7.6 km (15,000-25,000 ft) a.s.l. and drifted NE.
Sources: Steven Gates and Keizo Gates, Wellington Volcanic Ash Advisory Center (VAAC)
Report for Koryaksky
KVERT reported that seismic activity at Koryaksky was elevated on 6 and 8 March and at background levels on the other days during 7-13 March. Observers reported that gas plumes containing a small amount of ash rose to an altitude of 4 km (13,200 ft) a.s.l. and drifted in multiple directions during the reporting period. The plumes were also seen on satellite imagery. Ash deposits were seen near the volcano. The Level of Concern Color Code remained Orange.

Based on information from the Yelizovo Airport and KVERT, the Tokyo VAAC reported that during 11-12 and 15 March ash plumes rose to altitudes of 3-5.2 km (10,000-17,000 ft) a.s.l. and drifted S, SE, E, and N.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Redoubt
AVO reported that during 11-15 March seismic activity at Redoubt was low but remained above background levels. On 12, 14, and 15 March clear web camera views showed steam plumes that rose just above the summit. At about 1305 on 15 March, seismic activity increased and about four hours of volcanic tremor ensued. AVO scientists aboard an overflight saw a steam-and-ash plume rise to an altitude of 4.6 km (15,000 ft) a.s.l. and produce minor ashfall on the summit crater floor and down the S flank. The emissions originated from a new vent, located just S of the 1990 lava dome and W of the prominent ice collapse feature near the N edge of the summit crater. About twenty minutes later, a sediment-laden flow occurred from a small area in the ice on the upper part of Drift glacier. Steam plumes were later noted. AVO raised the Aviation Color Code to Orange and the Alert Level to Watch. Clear web camera views on 17 March showed no unusual activity.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Semeru
Based on information from CVGHM, the Darwin VAAC reported that on 12 March an eruption from Semeru produced a plume to an altitude of 4.6 km (15,000 ft) a.s.l. Ash was not identified on satellite imagery.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Aira
On 14 March, JMA reported two Vulcanian explosions from Sakura-jima to heights of 400-500 m above an unspecified crater; ejected bombs landed as far away as 800 m. Both the summit crater and Showa crater on the E flank had recently been active. Based on information from JMA, the Tokyo VAAC reported that an eruption on 17 March produced a plume that rose to an altitude of 2.1 km (6,000 ft) a.s.l. and drifted E.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Japan Meteorological Agency (JMA)
Report for Arenal
OVSICORI-UNA reported that during February, activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, and occasional avalanches from lava-flow fronts that traveled down the SW flanks. Acid rain and small amounts of ejected pyroclastic material affected the NE and SE flanks. Small avalanches of volcanic material traveled down several ravines. Crater D showed only fumarolic activity.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Report for Asamayama
Based on information from JMA, the Tokyo VAAC reported that on 15 March an eruption from Asama produced a plume that rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted E.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Batu Tara
Based on analysis of satellite imagery, the Darwin VAAC reported that on 11 March ash plumes from Batu Tara rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted N and NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Chaiten
Based on web camera views, analysis of satellite imagery, and SIGMET notices, the Buenos Aires VAAC reported that during 11-15 March ash plumes from Chaitén rose to altitudes of 2.1-3.7 km (7,000-12,000 ft) a.s.l. and drifted NNE, NE, E, and SE. A thermal anomaly was detected in satellite imagery on 15 March.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Report for Fuego
On 12, 16, and 17 March, INSIVUMEH reported that explosions from Fuego produced ash plumes that rose to altitudes of 4.2-4.8 km (13,800-15,700 ft) a.s.l. and drifted S and SW. Incandescent material was ejected 75 m into the air. Some explosions produced rumbling sounds heard in nearby towns. White plumes rose 150-200 m above the summit. During 16-17 March, fine ashfall was reported in areas downwind.

Based on analysis of satellite imagery and SIGMET notices, the Washington VAAC reported that during 12-13 March ash plumes drifted S and SW. On 13 March, the ash plume rose to an altitude of 5 km (16,500 ft) a.s.l.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Karymsky
KVERT reported that seismic activity at Karymsky was at background levels during 6-13 March. Based on interpretations of seismic data, ash plumes likely rose to an altitude of 3 km (10,000 ft) a.s.l. Analysis of satellite imagery revealed a thermal anomaly on the lava dome during 6-12 March, and ash plumes that drifted in multiple directions during the reporting period. The Level of Concern Color Code remained at Orange.

Based on information from KVERT and pilot observations, the Tokyo VAAC reported that on 13 March an ash plume rose to an altitude of 4 km (13,000 ft) a.s.l. and drifted E.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 11-17 March, HVO reported that 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. Thermal anomalies noted during most days on the coastal plain suggested surface flows. During 11-13 March, scattered surface flows near the Prince lobe were noted. On 13 March, a 30-m-wide lava flow entered the ocean at Kupapa'u, a second ocean entry location to the W of Waikupanaha. Kupapa'u was active during 14-17 March.

The vent in Halema'uma'u crater continued to produce a predominantly white plume; southwesterly winds often caused poor air quality in communities to the N. Incandescence from the vent was seldom seen. On 12 March, seemingly fresh spatter was collected from bins placed near the plume; minimal amounts of ash were collected the next day. The sulfur dioxide emission rate at the summit was 1,000 tonnes per day on 13 March; the 2003-2007 average rate was 140 tonnes per day. Field visits to the caldera floor indicated that there was an ash emission event sometime before dawn on 15 March, possibly following a wall collapse within the Halema'uma'u vent. Ash coated several monitoring instruments and was detected in Volcano, about 6 km NE. On 16 March, the plume drifted N and dusted HVO with ash.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Nevado del Huila
INGEOMINAS reported that during 11-17 March whitish colored gas plumes from Nevado del Huila viewed through the web camera rose to a maximum altitude of 6.4 km (21,000 ft) a.s.l. and drifted E and NW. The Alert Level remained at Orange.
Source: Servicio Geológico Colombiano (SGC)
Report for Pacaya
On 12, 16, and 17 March, INSIVUMEH reported that fumarolic plumes from Pacaya's MacKenney cone drifted S at a low altitude. Lava flows, 25-200 m long, traveled S, SW, and W.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Rabaul
RVO reported that during 9-15 March gray ash plumes from Rabaul caldera's Tavurvur cone rose to a maximum altitude of 2.7 km (8,900 ft) a.s.l. Incandescence was seen at night and incandescent tephra was occasionally ejected from the crater during periods of heightened activity. Light ashfall was reported in areas to the NW and SE.
Source: Rabaul Volcano Observatory (RVO)
Report for Santa Maria
On 12, 16, and 17 March, INSIVUMEH reported that explosions from Santa María's Santiaguito lava dome complex produced ash plumes that rose to altitudes of 2.7-3.5 km (8,900-11,500 ft) a.s.l. and drifted E and SW. A few avalanches originated from an active lava flow and traveled down the SW flank. White plumes rose 100 m and drifted W. Based on analysis of satellite imagery, the Washington VAAC reported that on 12 March an ash plume drifted S. On 15 March, an ash plume rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted SW and WSW.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
KVERT reported that during 6-13 March seismic activity at Shiveluch was above background levels and strong fumarolic activity was seen. Based on interpretations of seismic data, ash plumes likely rose to an altitude of 6.2 km (20,300 ft) a.s.l. Incandescence from the lava dome was seen at night. According to observers, ash plumes from hot avalanches rose to an altitude of 6 km (19,700 ft) a.s.l. and drifted SE during 9-10 March. Analysis of satellite imagery revealed a daily thermal anomaly on the lava dome and ash plumes that drifted about 175 km SE during 7 and 10-11 March. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Suwanosejima
Based on information from JMA, the Tokyo VAAC reported that on 15 and 16 March eruptions from Suwanose-jima produced plumes that rose to an altitude of 1.5 km (5,000 ft) a.s.l. Plumes drifted E on 15 March.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Tungurahua
On 11 March, IG reported that a steam-and-ash plume from Tungurahua rose 600 m above the summit and drifted E and NE. Fumaroles on the NE flank were active. On 12 and 16 March, plumes with low ash content rose to altitudes of 6-7 km (19,700-23,000 ft) a.s.l. and drifted NE. Steam plumes were occasionally seen during 13-14 and 17 March, and a plume rose 300-500 m above the summit and drifted E and W on 15 March.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Ubinas
Based on a SIGMET notice and analysis of satellite imagery, the Buenos Aires VAAC reported that during 11-12 March ash plumes from Ubinas rose to altitudes of 5.5-7.3 km (18,000-24,000 ft) a.s.l. and drifted NE. A SIGMET notice described an ash plume that rose to altitudes of 9.1-9.8 km (30,000-32,000 ft) a.s.l. on 15 March; ash was not identified in satellite imagery.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)