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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 7 May-13 May 2014
Name Location Eruption Start Date Report Status
Ahyi Mariana Islands (USA) New
Merapi Central Java (Indonesia) 2020 Dec 31 New
Santa Maria Guatemala 1922 Jun 22 New
Tengger Caldera Eastern Java (Indonesia) New
Aira Kyushu (Japan) 2017 Mar 25 Continuing
Chirinkotan Kuril Islands (Russia) 2021 Aug 8 Continuing
Chirpoi Kuril Islands (Russia) Continuing
Dukono Halmahera (Indonesia) 1933 Aug 13 Continuing
Etna Sicily (Italy) 2013 Sep 3 Continuing
Karymsky Eastern Kamchatka (Russia) 2020 Apr 1 Continuing
Kilauea Hawaiian Islands (USA) Continuing
Krakatau Indonesia Continuing
San Miguel El Salvador Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Shishaldin Fox Islands (USA) Continuing
Ubinas Peru Continuing
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 17,038 individual reports over 1,081 weeks (average of 16 per week) on 315 different volcanoes.

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Agung Concepcion Ijen Little Sitkin Peuet Sague Spurr
Ahyi Copahue Iliamna Llaima Pinatubo St. Helens
Aira Cotopaxi Iliwerung Loihi Planchon-Peteroa Stromboli
Akan Cuicocha Inielika Lokon-Empung Poas Sulu Range
Alaid Cumbal Ioto Lopevi Popocatepetl Sumbing
Alu-Dalafilla Dabbahu Irazu Machin Puyehue-Cordon Caulle Sundoro
Ambae Dempo Iya Makian Rabaul Suretamatai
Ambang Descabezado Grande Izu-Torishima Makushin Raikoke Suwanosejima
Ambrym Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Taal
Anatahan Dukono Kaba Manam Raoul Island Tair, Jebel at
Aniakchak Ebeko Kadovar Manda Hararo Rasshua Takawangha
Antillanca Volcanic Complex Ebulobo Kambalny Marapi Raung Talang
Antuco Egon Kanaga Maroa Redoubt Tambora
Apoyeque Ekarma Kanlaon Martin Reventador Tanaga
Arenal Epi Karangetang Masaya Reykjanes Tandikat-Singgalang
Asamayama Erebus Karkar Maule, Laguna del Rincon de la Vieja Tangkoko-Duasudara
Askja Erta Ale Karthala Mauna Loa Rinjani Tangkuban Parahu
Asosan Etna Karymsky Mayon Ritter Island Tara, Batu
Atka Etorofu-Yakeyama [Grozny Group] Kasatochi McDonald Islands Rotorua Telica
Augustine Eyjafjallajokull Katla Melimoyu Ruang Tenerife
Avachinsky Fernandina Katmai Merapi Ruapehu Tengger Caldera
Awu Fogo Kavachi Midagahara Ruiz, Nevado del Three Sisters
Axial Seamount Fonualei Kelimutu Misti, El Sabancaya Tinakula
Azul, Cerro Fournaise, Piton de la Kelut Miyakejima Sakar Tofua
Azumayama Fourpeaked Kerinci Momotombo Salak Tokachidake
Bagana Fuego Ketoi Monowai San Cristobal Tolbachik
Balbi Fujisan Kharimkotan Montagu Island San Miguel Toliman
Bamus Fukutoku-Oka-no-Ba Kick 'em Jenny Moyorodake [Medvezhia] San Vicente Tongariro
Banda Api Galeras Kikai Mutnovsky Sangay Tungurahua
Bardarbunga Galunggung Kilauea Myojinsho Sangeang Api Turrialba
Barren Island Gamalama Kirishimayama Nabro Santa Ana Ubinas
Batur Gamkonora Kizimen Negra, Sierra Santa Maria Ugashik-Peulik
Bezymianny Gareloi Klyuchevskoy Negro, Cerro Sarigan Ukinrek Maars
Bogoslof Gaua Kolokol Group Nightingale Island Sarychev Peak Ulawun
Brava Gorely Korovin Nishinoshima Saunders Unnamed
Bristol Island Great Sitkin Koryaksky Nisyros Savo Unnamed
Bulusan Grimsvotn Krakatau Novarupta Semeru Veniaminof
Calbuco Guagua Pichincha Krummel-Garbuna-Welcker NW Rota-1 Semisopochnoi Villarrica
Callaqui Guallatiri Krysuvik-Trolladyngja Nyamulagira Seulawah Agam West Mata
Cameroon Guntur Kuchinoerabujima Nyiragongo Sheveluch Westdahl
Campi Flegrei del Mar di Sicilia Hachijojima Kurikomayama Okataina Shishaldin Whakaari/White Island
Cayambe Hakoneyama Kusatsu-Shiranesan Okmok Simbo Witori
Cereme Heard Kverkfjoll Ontakesan Sinabung Wolf
Chachadake [Tiatia] Hekla La Palma Oraefajokull Sinarka Yasur
Chaiten Helgrindur Lamington Osorno Siple Zaozan [Zaosan]
Chiginagak Hierro Lamongan Pacaya Sirung Zavodovski
Chikurachki Hokkaido-Komagatake Langila Pagan Slamet Zhupanovsky
Chiles-Cerro Negro Home Reef Lanin Palena Volcanic Group Snaefellsjokull Zubair Group
Chillan, Nevados de Hood Lascar Paluweh Soputan
Chirinkotan Huaynaputina Lateiki Panarea Sorikmarapi
Chirpoi Hudson, Cerro Lengai, Ol Doinyo Papandayan Sotara
Cleveland Huila, Nevado del Leroboleng Parker Soufriere Hills
Colima Hunga Tonga-Hunga Ha'apai Lewotobi Pavlof Soufriere St. Vincent
Colo Ibu Lewotolok Pelee South Sarigan Seamount
 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 monthly, and 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
A helicorder plot from a station on Pagan showed that seismic signals from a source at or near the Ahyi seamount stopped at 1610 on 8 May. An additional isolated event was reported at 1810.
Source: 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 2-8 May white plumes rose as high as 650 m above Merapi. Thumping noises continued to be reported from multiple observation posts. Seismicity fluctuated but remained above background levels. The Alert Level remained at 2 (on a scale of 1-4) on 29 April.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Santa Maria
CONRED and INSIVUMEH reported that activity at the Santa María's Santiaguito lava-dome complex increased on 9 May. Pyroclastic flows descended the E and SE flanks, and a dense ash plume rose to an altitude of 7.6 km (25,000 ft) a.s.l. Ashfall was reported in areas at least 20 km away, including Las Marías, San Marcos (10 km SW), Palajunoj (18 km SSW), El Faro (SW flank), La Florida (5 km S), Patzulín, and Quetzaltenango (18 km WNW); about 130 people were evacuated from these areas due to persistent airborne ash. A deep notch left in the crater between the E and NE flanks channeled a pyroclastic flow which traveled 7 km into the Nima I drainage (S flank). Deposits in the drainage were estimated to be a million cubic meters; secondary explosions in the drainage were caused by the interaction of water and these hot deposits.

INSIVUMEH noted that activity returned to a normal range on 10 May, with 2-3 explosions per hour generating ash plumes that rose 800 m and drifted W. On 11 May explosions produced ash plumes that rose 800 m, drifted SW, and caused ashfall in San Marcos and the El Rosario Palajunoj finca.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Tengger Caldera
PVMBG reported that during 1-30 April diffuse white plumes from Tengger Caldera's Bromo cone rose 50 m above the crater. Seismicity increased during 15-30 April. From 1 to 4 May seismicity again increased and denser white plumes rose as high as 250 m. On 4 May the Alert Level was raised to 2 (on a scale of 1-4). Residents and visitors were warned not to approach the crater within a radius of 1 km.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Aira
JMA reported that a small non-explosive eruption from Showa Crater at Aira Caldera’s Sakurajima volcano occurred during 7-9 May. Incandescence from the crater was detected at night. A very small eruption at Minamidake Crater at 1151 on 8 May produced a plume that rose 400 m above the crater rim. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that during 10 and 12 May plumes rose to altitudes of 2.4-5.5 km (8,000-18,000 ft) a.s.l. and drifted W, SE, and E. On 13 May a pilot observed an ash plume that rose to an altitude of 1.2 km (4,000 ft) a.s.l.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Chirinkotan
SVERT reported that satellite images of Chirinkotan showed gas-and-steam emissions on 7 May. Cloud cover obscured views on the other days during 5-12 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 on 7 and 9 May. Cloud cover obscured views on other days during 5-12 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 8-9 and 12 May ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 75-110 km WNW, W, and SW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Etna
INGV reported that weak Strombolian activity at Etna's New Southeast Crater (NSEC) continued through 9 May. Some explosions ejected incandescent pyroclastic material a few tens of meters above the crater rim that rarely fell onto the outer flanks.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Karymsky
KVERT reported that Vulcanian and Strombolian activity continued at Karymsky during 2-8 May. Satellite images detected a thermal anomaly on the volcano every day except during 3-4 May, days cloud cover obscure views. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kilauea
During 7-13 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 overflowed on the N flanks and extended from the S base of the cone. The N cone ejected spatter. The Kahauale’a 2 lava flow continued to advance, with breakouts from the main stalled lobe, and burn 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 Krakatau
PVMBG reported that during January-8 May diffuse white plumes rose 25-50 m above Anak Krakatau. Seismicity continued to be dominated by shallow and deep volcanic earthquakes, as well as signals indicating emissions. The Alert Level remained at 2 (on a scale of 1-4). Residents and visitors were warned not to approach the volcano within 1 km of the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for San Miguel
According to SNET, the Ministerio de Medio Ambiente y Recursos Naturales (MARN) reported that on 10 May San Miguel emitted small amounts of ash. Ashfall, less than 1 mm thick, was observed in areas between the Parque de las Placitas and Placitas.
Source: Servicio Nacional de Estudios Territoriales (SNET)
Report for Sheveluch
KVERT reported that during 2-8 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. Video images showed ash plumes rising to altitudes of 7-9.5 km (23,000-31,000 ft) a.s.l. and drifting 60 km NW at 1150 on 13 May. Later that day, at 1300, satellite images detected an ash plume that rose to altitudes of 5-8 km (16,400-26,000 ft) a.s.l. and drifted 90 km NW. 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 7-13 May, periods of elevated surface temperatures and minor steaming were observed. A report from 9 May noted that dark ash-covered snow near the summit was visible on an unspecified day during the past week. A continuous “tremor-like” signal detected during 0430-0630 on 13 May coincided with a distinct increase in surface temperatures, possibly indicating a Strombolian eruption. 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 7-12 May gas-and-ash plumes, sometimes with only minor amounts of ash, rose 0.6-3 km above the crater. Ash fell in various towns downwind of the plumes including Querapi (4 km S), Ubinas (6.5 km SSE), Escacha, Anascapa, San Miguel, and Tonohaya. Significant ashfall was reported in Santa Rosa de Phara on 8 May.
Sources: Instituto Geofísico del Perú (IGP), Instituto Geológico Minero y Metalúrgico (INGEMMET)