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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 30 April-6 May 2014
Name Location Eruption Start Date Report Status
Ahyi Mariana Islands (USA) New
Merapi Central Java 2020 Dec 31 New
Slamet Central Java New
Soputan Sulawesi New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Bagana Bougainville (Papua New Guinea) 2000 Feb 28 (in or before) Continuing
Chirinkotan Kuril Islands (Russia) Continuing
Chirpoi Kuril Islands (Russia) Continuing
Dukono Halmahera 1933 Aug 13 Continuing
Etna Sicily (Italy) 2022 Nov 27 Continuing
Karymsky Eastern Kamchatka (Russia) Continuing
Kilauea Hawaiian Islands (USA) Continuing
Reventador Ecuador 2008 Jul 27 Continuing
Semeru Eastern Java 2017 Jun 6 Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Shishaldin Fox Islands (USA) 2023 Jul 12 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 19,363 individual reports over 1,185 weeks (average of 16 per week) on 331 different volcanoes.

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


Download Smithsonian / USGS Weekly Volcanic Activity Report Network RSS Feed

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



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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 Ahyi
Seismic stations on Pagan, Sarigan, Anatahan, and Saipan started recording signals on 24 April that continued at least through 2 May. The source had not been confirmed, but is thought to be at or near the Ahyi seamount. During 4-5 May a helicorder plot from a station on Pagan showed explosive signals at a rate of 20 per hour.
Sources: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program, Matthew Haney, Alaska Volcano Observatory via Bill Chadwick, Oregon State University's Marine Science Center and NOAA/PMEL EOI Program, personal communication
Report for Merapi
PVMBG reported that during 20-29 April seismicity at Merapi increased and thumping sounds were heard within an 8 km radius. On 25 April white fumarolic plumes rose 450 m and drifted W. The Alert Level was raised to 2 (on a scale of 1-4) on 29 April.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Slamet
PVMBG reported that during 29 March-30 April seismicity at Slamet increased and inflation was detected. Observers noted that white plumes rose as high as 800 m above the crater, and dense gray ash plumes rose as high as 2 km and drifted E and W. During 19-25 April the plumes were gray to brown, and ejected material was deposited on the flanks 300 m from the crater. Crater incandescence was noted. During 26-30 April the ash plumes continued to have a brownish component, and material fell in areas within 1.5 km W. The crater was again incandescent. Rumbling noises were reported and windows at the Slamet observation post rattled during 27-29 April. The Alert Level was raised to 3 (on a scale of 1-4) on 30 April. Residents and tourists were warned not approach the crater within a radius of 4 km.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Soputan
PVMBG reported that during April diffuse white plumes from Soputan rose at most 100 m. During 30 April-1 May seismic activity significantly increased, characterized by signals indicating deep volcanic earthquakes and avalanches. On 1 May the Alert Level was raised to 3 (on a scale of 1-4). Residents and tourists were advised not to approach the craters within a radius of 6.5 km.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Aira
JMA reported that during 28 April-2 May four explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 500 m. Incandescence from the crater was detected at night during 28-30 April. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that during 30 April-3 May and on 5 May plumes rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. and drifted E, SE, and SW. On 30 April a pilot observed an ash plume that rose to an altitude of 2.7 km (9,000 ft) a.s.l.
Sources: Tokyo Volcanic Ash Advisory Center (VAAC), Japan Meteorological Agency (JMA)
Report for Bagana
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 1 May an ash plume from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted over 45 km SSE.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Chirinkotan
SVERT reported that satellite images of Chirinkotan showed a thermal anomaly on 29 April. Cloud cover obscured views during 30 April-5 May. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Chirpoi
SVERT reported that satellite images over Snow, a volcano of Chirpoi, detected a thermal anomaly during 29-30 April. Cloud cover obscured views during 1-5 May. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Dukono
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 30 April-6 May ash plumes from Dukono rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. The plumes drifted 35-185 km SE, E, SW, and W on 30 April and during 3-6 May but stayed in the vicinity of the volcano on the other days.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Etna
INGV reported that during the morning of 22 April sporadic and weak Strombolian activity resumed at Etna's New Southeast Crater (NSEC) and continued for the next few days. Some explosions ejected incandescent pyroclastic material out of the crater and onto the upper S and SE flanks of the cone. A few small collapses occurred on the cone's unstable E flank. The frequency and intensity of Strombolian explosions slightly increased late in the evening on 30 April. Degassing at the Northeast Crater also increased and thermal anomalies were detected by a camera.

Weak Strombolian activity continued to be detected through 1 May. During the night of 2-3 May incandescence was caused by weak high-temperature gas emissions and/or Strombolian explosions. The activity intensified on 4 May and some of the explosions ejected incandescent pyroclastic material onto the high S and SE parts of the NSEC cone.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Karymsky
KVERT reported that Vulcanian and Strombolian activity continued at Karymsky during 25 April-2 May. Satellite images detected a thermal anomaly on the volcano on 27 and 30 April and 1 May; cloud cover obscure views on the other days. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 30 April-6 May HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas; smaller particles may have been dropped several kilometers away.

At Pu'u 'O'o Crater, glow emanated from spatter cones on the N and S portions of the crater floor, and from the lava pond in the NE spatter cone. The S spatter cone periodically erupted lava flows that traveled N and SE beyond the crater rim. During 5-6 May the N cone ejected spatter and a small lava flow. The Kahauale’a 2 lava flow continued to advance, with breakouts from the main stalled lobe, and burned adjoining forest. On 5 May geologists mapped the farthest point of activity, 8.6 km NE of Pu’u 'O'o.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Reventador
IG reported that a small pyroclastic flow traveled a few meters below Reventador’s crater on 29 April. Cloud cover occasionally prevented visual observations during 30 April-6 May. An ash plume rose 3-4 km and drifted W on 1 May, and a steam plume with some ash rose less than 1 km the next day. People in Camp San Rafael (8 km ESE) reported that an explosion at 2040 on 4 May ejected a large amount of incandescent material onto the flanks, and generated an ash plume that rose 4-5 km above the crater and drifted NW. Explosions on 5 May produced ash plumes that rose 4 km. At 0925 an explosion vibrated windows in the camp. On 6 May explosions again rattled windows in the camp and a gas plume was observed rising 1 km and drifted W.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Semeru
PVMBG reported that during 1 March-27 April white-and-gray plumes rose 100-400 m above Semeru’s Jongring Seloko crater and drifted W; during April eight “eruption” plumes rose 300-500 m. On 26 April at 1852 and 1934, and on 27 April at 0500, incandescent rockslides from the lava dome traveled as far as 300 m down the S flank. As of 28 April the Alert Level remained at 2 (on a scale of 1-4) and the public was reminded not to approach the crater within a 4-km radius.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Sheveluch
KVERT reported that during 25 April-2 May lava-dome extrusion onto Shiveluch’s SE flank was accompanied by ash explosions, incandescence, hot avalanches, and fumarolic activity. Satellite images showed a bright thermal anomaly daily. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Shishaldin
AVO reported that although cloud cover occasionally prevented web-cam and satellite observations of Shishaldin's summit area during 30 April-6 May, periods of elevated surface temperatures and minor steaming were observed. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Ubinas
IGP's Observatorio Volcanologico de Arequipa (IGP-OVA) and Observatorio Vulcanológico del INGEMMET (OVI) reported that during 30 April-1 May seismic activity at Ubinas increased significantly, and then declined through 6 May. Explosions generated ash plumes that rose 0.2-3 km above the crater and drifted in multiple directions, especially to the S, SE, E, and NE. Ash fell in various towns downwind of the plumes including Querapi (4 km S), Ubinas (6.5 km SSE), Escacha, Anascapa, San Miguel, and Lloque. On 4 May minor amounts of ash fell throughout the Ubinas valley, more than 15 km away. Although sulfur dioxide emissions had been declining since the peak on 15 April (4,873 tons per day) they continued to be high at more than 1,000 tons per day; villages downwind reported strong sulfur odors.
Sources: Instituto Geofísico del Perú (IGP), Instituto Geológico Minero y Metalúrgico (INGEMMET)