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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 2 April-8 April 2008
Name Location Eruption Start Date Report Status
Kilauea Hawaiian Islands (USA) 2021 Sep 29 New
Manam Northeast of New Guinea 2014 Jun 29 New
Nevado del Huila Colombia New
Colima Mexico Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Krakatau Sunda Strait 2021 May 25 Continuing
Llaima Central Chile 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
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 18,389 individual reports over 1,142 weeks (average of 16 per week) on 328 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 Little Sitkin Planchon-Peteroa Stromboli
Ahyi Cuicocha Iliwerung Llaima Poas Sulu Range
Aira Cumbal Inielika Lokon-Empung Popocatepetl Sumbing
Akan Dabbahu Ioto Lonquimay Purace Sundoro
Alaid Davidof Irazu Lopevi Puyehue-Cordon Caulle Suretamatai
Alu-Dalafilla Dempo Iya Machin Rabaul Suwanosejima
Ambae Descabezado Grande Izu-Torishima Makushin Raikoke Taal
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Tair, Jebel at
Ambrym Dukono Kaba Manam Raoul Island Takawangha
Anatahan Ebeko Kadovar Manda Hararo Rasshua Talang
Aniakchak Ebulobo Kaitoku Seamount Marapi Raung Tambora
Antillanca Volcanic Complex Edgecumbe Kama'ehuakanaloa Maroa Redoubt Tanaga
Antuco Egon Kambalny Martin Reventador Tandikat-Singgalang
Apoyeque Ekarma Kanaga Masaya Reykjanes Tangkoko-Duasudara
Arenal Epi Kanlaon Maule, Laguna del Rincon de la Vieja Tangkuban Parahu
Asamayama Erebus Karangetang Mauna Loa Rinjani Tara, Batu
Askja Erta Ale Karkar Mayon Ritter Island Ta'u
Asosan Etna Karthala McDonald Islands Rotorua Taupo
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karymsky Melimoyu Ruang Telica
Augustine Eyjafjallajokull Kasatochi Merapi Ruapehu Tenerife
Avachinsky Fagradalsfjall Katla Midagahara Ruiz, Nevado del Tengger Caldera
Awu Fernandina Katmai Misti, El Sabancaya Three Sisters
Axial Seamount Fogo Kavachi Miyakejima Sakar Tinakula
Azul, Cerro Fonualei Kelimutu Momotombo Salak Tofua
Azumayama Fournaise, Piton de la Kelud Monowai San Cristobal Tokachidake
Bagana Fourpeaked Kerinci Montagu Island San Miguel Tolbachik
Balbi Fuego Ketoi Moyorodake [Medvezhia] San Vicente Toliman
Bamus Fujisan Kharimkotan Mutnovsky Sangay Tongariro
Banda Api Fukutoku-Oka-no-Ba Kick 'em Jenny Myojinsho Sangeang Api Trident
Bardarbunga Galeras Kie Besi Nabro Santa Ana Tungurahua
Barren Island Galunggung Kikai Negra, Sierra Santa Maria Turrialba
Batur Gamalama Kilauea Negro, Cerro Sao Jorge Ubinas
Bezymianny Gamkonora Kirishimayama Nightingale Island Sarigan Ugashik-Peulik
Bogoslof Gareloi Kita-Ioto Nishinoshima Sarychev Peak Ukinrek Maars
Brava Gaua Kizimen Nisyros Saunders Ulawun
Bristol Island Gorely Klyuchevskoy Novarupta Savo Unnamed
Bulusan Great Sitkin Kolokol Group NW Rota-1 Semeru Unnamed
Calbuco Grimsvotn Koryaksky Nyamulagira Semisopochnoi Veniaminof
Callaqui Guagua Pichincha Krakatau Nyiragongo Seulawah Agam Villarrica
Cameroon Guallatiri Krummel-Garbuna-Welcker Ofu-Olosega Sheveluch Vulcano
Campi Flegrei del Mar di Sicilia Guntur Krysuvik-Trolladyngja Okataina Shishaldin West Mata
Cayambe Hachijojima Kuchinoerabujima Okmok Simbo Westdahl
Chachadake [Tiatia] Hakoneyama Kurikomayama Ontakesan Sinabung Whakaari/White Island
Chaiten Heard Kusatsu-Shiranesan Oraefajokull Sinarka Witori
Chiginagak Hekla Kverkfjoll Osorno Siple Wolf
Chikurachki Helgrindur La Palma Pacaya Sirung Yakedake
Chiles-Cerro Negro Hierro Lamington Pagan Slamet Yasur
Chillan, Nevados de Hokkaido-Komagatake Lamongan Palena Volcanic Group Snaefellsjokull Yufu-Tsurumi
Chirinkotan Home Reef Langila Paluweh Soputan Zaozan [Zaosan]
Chirpoi Hood Lanin Panarea Sorikmarapi Zavodovski
Ciremai Huaynaputina Lascar Papandayan Sotara Zhupanovsky
Cleveland Hudson, Cerro Lateiki Parker Soufriere Hills Zubair Group
Colima Huila, Nevado del Lengai, Ol Doinyo Pavlof Soufriere St. Vincent
Colo Hunga Tonga-Hunga Ha'apai Leroboleng Pelee South Sarigan Seamount
Concepcion Ibu Lewotobi Peuet Sague Spurr
Copahue Ijen Lewotolok Pinatubo St. Helens
 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 Kilauea
Based on observations during helicopter overflights, visual observations from HVO and National Park Service (NPS) crews, and web camera views, HVO reported that during 2-8 April lava flow activity from Kilauea's Thanksgiving Eve Breakout (TEB) shield was mostly concentrated at the E Waikupanaha, W Waikupanaha, and Ki ocean entries. Spattering and small steam explosions were intermittently reported. Occasionally, incandescence from a skylight adjacent to the TEB vents and from breakouts along the lava-tube system was noted. Diffuse incandescence was seen on the web camera at Pu'u 'O'o crater during 2-4 and 7-8 April.

During the reporting period, Kilauea summit earthquakes were located beneath Halema`uma`u Crater, beneath the summit to the S and W, along the S-flank faults, and along the SW and E rift zones. The eruption from the vent in Halema'uma'u Crater continued to produce brown or white ash plumes that drifted mainly SW. During most nights incandescence was seen at the base of the plume and incandescent fragments were ejected from the vent. Based on pilot observations, the Washington VAAC reported that the plumes rose to altitudes of 3.4-3.8 km (11,200-12,500 ft) a.s.l. on 5 and 7 April. Seismic tremor was elevated.

Sulfur dioxide emission rates from the summit area have been elevated at 2-4 times background values since early January. The emission rate fluctuated between 480-800 tonnes per day during 2-7 April, compared to a background rate of 150-200 tonnes per day. At Pu'u 'O'o crater the emission rate was 1,300 tonnes on 5 April.

According to a news report, the Hawaii County Civil Defense issued a health advisory on 7 April for those living downwind of Halema'uma'u and Pu'u 'O'o craters. Residents of specified areas were then advised by the State Department of Health to evacuate because of projected dangerous level of sulfur dioxide. Residents of other areas were put on alert.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Honolulu Advertiser, US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Manam
Based on observations of satellite imagery and reports from RVO, the Darwin VAAC reported that a low-level plume from Manam drifted SW on 2 April.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Nevado del Huila
According to news articles, communities surrounding Nevado del Huila responded to the raised Alert Level of Orange, established by INGEOMINAS on 29 March. The Local Committee of Disaster Prevention ordered the closing of a school with a student population of 1,100, declared the maximum alert for a local hospital, and facilitated meetings of multiple groups. Residents bought supplies and repaired roads that were key evacuation routes, and sirens were tested each day. Several populations in high-risk areas did not have systems of communication. On 7 April, residents in high-risk areas near the Páez river were evacuated to shelters as a precautionary measure.

On 8 April, INGEOMINAS lowered the Alert Level to Yellow due to decreased seismicity during 2-8 April. In addition, no superficial changes associated with the recent activity were observed during an overflight on 5 April.
Sources: Servicio Geológico Colombiano (SGC), EL PAÍS, El Tiempo
Report for Colima
During 1-2 April, ash plumes from Colima rose to altitudes of 4.2-6.4 km (13,800-21,000 ft) a.s.l. and drifted NW, W, and SW. Incandescent avalanches descended the SW flank. On 4 April, incandescent material was propelled 150 m above the summit. An ash plume rose to an altitude of 4.5 km (14,800 ft) a.s.l. Based on observations of satellite imagery, the Washington VAAC reported that a brief puff of ash drifted SE on 7 April.
Sources: Gobierno del Estado de Colima, Washington Volcanic Ash Advisory Center (VAAC)
Report for Karymsky
KVERT reported that seismic activity at Karymsky was above background levels during 28-29 March and slightly above background levels during 30 March-4 April. Pilots observed ash plumes to altitudes of 5-7 km (16,400-23,000 ft) a.s.l. during 28-29 March. Based on seismic interpretation, ash plumes possibly rose to an altitude of 2.5 km (8,200 ft) a.s.l. on 2 April and weak ash explosions or avalanches may have occurred daily during the reporting period. Observations of satellite imagery revealed that a thermal anomaly was present in the crater on 28 March and 1, 2, and 3 April; an ash plume drifted S on 3 April. Ash deposits were noted in areas about 20 km E, 70 km SW, and 45-50 km S. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Krakatau
CVGHM lowered the Alert Level for Anak Krakatau to 2 (on a scale of 1-4) on 1 April. Seismicity declined in early February, and eruption plumes and propelled incandescent material were not seen after 4 February. Visitors and residents were advised not to go within a 1.5-km radius of the summit.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Llaima
SERNAGEOMIN reported that during 28 March-4 April, fumarolic plumes from Llaima drifted several tens of kilometers mainly to the SE. Explosions produced ash and gas emissions. An overflight on 2 April of the main crater revealed that gas, pyroclastic material, and ash emissions, occasionally accompanied by small explosions, originated from three cones. On 4 April, several explosions were heard and incandescence was reflected in a gas-and-ash plume.
Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Report for Rabaul
RVO reported that during 1-9 April ash and steam-and-ash plumes rose to altitudes of 0.9-1.7 km (3,000-5,600 ft) a.s.l. and drifted E and SE. Ashfall was reported in Kokopo (about 20 km SE) on 2 April and in areas downwind during 4-7 April. Incandescence at night at the summit and occasional explosions were reported. Roaring noises were reported and sometimes rhythmic during 2-3 and 8-9 April.
Source: Rabaul Volcano Observatory (RVO)
Report for Santa Maria
Based on observations of satellite imagery, the Washington VAAC reported that ash puffs from Santa María's Santiaguito lava dome complex drifted W on 2 April. During 3-7 April, INSIVUMEH reported that small explosions produced ash plumes; ashfall was reported in surrounding areas.
Sources: Washington Volcanic Ash Advisory Center (VAAC), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Sheveluch
KVERT reported that seismic activity at Shiveluch was slightly above background levels during 28 March-4 April and hot avalanches possibly descended the growing lava dome daily. According to video footage and visual observations, fumarolic activity from the lava dome was observed during 28-29 March and 1-3 April. Observations of satellite imagery revealed that a thermal anomaly was present in the crater during the reporting period. The Level of Concern Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Soufriere Hills
MVO reported that during 1-4 April the lava dome at Soufrière Hills changed very little, based on measurable parameters. Seismic activity was very low and one rockfall signal was recorded. The Alert Level remained elevated at 4 (on a scale of 0-5).
Source: Montserrat Volcano Observatory (MVO)
Report for Tungurahua
The IG reported that although visual observations were limited due to cloud cover, ash and ash-and-steam plumes from Tungurahua were spotted and rose to altitudes of 5.5-9 km (18,000-30,000 ft) a.s.l. during 2-8 April. Ash plumes drifted in almost all directions; ashfall was reported in areas downwind during 4-8 April. Explosions were occasionally registered by the seismic network and roaring and "cannon shot" noises were reported. Incandescent material rolled 0.5-1 km down the flanks during 2-4 and 6-7 April and Strombolian activity at the summit was noted during 3-4 April.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Report for Ubinas
Based on pilot observations, the Buenos Aires VAAC reported that an ash plume from Ubinas rose to altitudes of 5.5-6.7 km (18,000-22,000 ft) a.s.l. and drifted E on 6 April.
Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)