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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 8 February-14 February 2023
Name Location Eruption Start Date Report Status
Aira Kyushu (Japan) 2017 Mar 25 New
Chikurachki Paramushir Island (Russia) New
Karangetang Sangihe Islands 2018 Nov 25 New
Lascar Northern Chile New
Tengger Caldera Eastern Java New
Ahyi Mariana Islands (USA) 2024 Jan 1 Continuing
Cotopaxi Ecuador Continuing
Dukono Halmahera 1933 Aug 13 Continuing
Ebeko Paramushir Island (Russia) 2022 Jun 11 Continuing
Great Sitkin Andreanof Islands (USA) 2021 May 25 Continuing
Huaynaputina Peru Continuing
Ibu Halmahera 2008 Apr 5 Continuing
Kerinci Central Sumatra Continuing
Kilauea Hawaiian Islands (USA) Continuing
Lewotolok Lembata Island 2020 Nov 27 Continuing
Marapi Central Sumatra 2023 Dec 3 Continuing
Merapi Central Java 2020 Dec 31 Continuing
Semeru Eastern Java 2017 Jun 6 Continuing
Semisopochnoi Aleutian Islands (USA) Continuing
Sheveluch Central Kamchatka (Russia) 1999 Aug 15 Continuing
Suwanosejima Ryukyu Islands (Japan) 2004 Oct 23 Continuing
Tangkuban Parahu Western Java Continuing
Villarrica Central Chile 2014 Dec 2 ± 7 days Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

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

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Agung Cuicocha Iliwerung Llaima Popocatepetl Sumbing
Ahyi Cumbal Inielika Lokon-Empung Purace Sundoro
Aira Dabbahu Ioto Lonquimay Puyehue-Cordon Caulle Suretamatai
Akan Davidof Irazu Lopevi Rabaul Suwanosejima
Alaid Dempo Iya Machin Raikoke Taal
Alu-Dalafilla Descabezado Grande Izu-Torishima Makushin Ranakah Tair, Jebel at
Ambae Dieng Volcanic Complex Jackson Segment Maly Semyachik Raoul Island Takawangha
Ambang Dukono Kaba Manam Rasshua Talang
Ambrym East Epi Kadovar Manda Hararo Raung Tambora
Anatahan Ebeko Kaitoku Seamount Marapi Redoubt Tanaga
Aniakchak Ebulobo Kama'ehuakanaloa Maroa Reventador Tandikat-Singgalang
Antillanca Volcanic Complex Edgecumbe Kambalny Martin Reykjanes Tangkoko-Duasudara
Antuco Egon Kanaga Masaya Rincon de la Vieja Tangkuban Parahu
Apoyeque Ekarma Kanlaon Maule, Laguna del Rinjani Tara, Batu
Arenal Eldey Karangetang Mauna Loa Ritter Island Ta'u
Asamayama Erebus Karkar Mayon Rotorua Taupo
Askja Erta Ale Karthala McDonald Islands Ruang Telica
Asosan Etna Karymsky 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 Aira
JMA reported ongoing eruptive activity at Aira Caldera’s Sakurajima volcano during 6-12 February and nightly crater incandescence. Three eruptive events and two explosions were recorded at Minamidake Crater. The first explosion, at 1815 on 9 November, generated an ash plume that rose 2 km above the crater rim and drifted N and ejected large blocks 600-900 m from the crater rim. The second explosion, at 1007 on 11 February, produced an ash plume that rose 1.7 km and ejected large blocks 600-900 m from the crater rim. An ash plume from an eruptive event at 1323 on 12 February rose 1.7 km and drifted E.

A very small eruption at Showa Crater at 1052 on 8 February produced an ash plume that rose 800 m above the crater rim. This was the first eruption at Showa Crater since 3 April 2018. Ash plumes from events recorded at 1110 and 1425 rose as high as 1 km and drifted SE and SW, respectively, and blocks were ejected 200-300 m from the crater. Ashfall was reported in an area from Arimura-cho (4.5 km SE) to Furusato-cho (3 km S). The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from the crater.
Source: Japan Meteorological Agency (JMA)
Report for Chikurachki
KVERT reported that a moderate explosive eruption at Chikurachki continued during 2-9 February. A thermal anomaly was identified in satellite images during 5-6 February and ash plumes drifted 125 km SE, E, and NE. The Aviation Color Code remined at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Karangetang
According to PVMBG the eruption at Karangetang’s Main Crater (S crater) continued during 8-14 February. Multiple nighttime webcam images posted with daily reports showed three main incandescent lava flows of different lengths descending the S, SW, and W flanks. Incandescent rocks dotted the upper flanks, possibly from ejected or collapsed material from the crater; the incandescence was most intense at the summit. The Alert Level remained at 3 (on a scale of 1-4) and the public were advised to stay 2.5 km away from Main Crater with an extension to 3.5 km on the S and SE flanks.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Lascar
SERNAGEOMIN reported that seismicity at Láscar was dominated by volcano-tectonic signals with smaller numbers of both long-period and tornillo-type events during 7-14 February. Seismicity increased during the week, associated with continuing effusion of the dome-like structure that had emerged on the crater floor on 30 January. Daily whitish gas emissions were mostly diffuse and rose around 400 m above the crater rim, though emissions rose as high as 700 m during 11-12 February. Sulfur dioxide emissions were low, no deformation was detected, and no thermal anomalies were identified in satellite images. The Alert Level remained at Orange (the second highest level on a four-color scale) and SENAPRED warned the public to stay at least 10 km away from the crater. ONEMI maintained an Alert Level Yellow (the middle level on a three-color scale) for San Pedro de Atacama (70 km NW).
Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)
Report for Tengger Caldera
PVMBG sent a team of scientists to investigate Tengger Caldera’s Bromo cone after an increase in activity was detected on 3 February, characterized by crater incandescence, rumbling sounds, and a strong sulfur dioxide odor. They observed somewhat dense white emissions rising as high as 300 m during 9-12 February and heard moderate-to-strong rumbling noises. A sulfur dioxide odor was strong near the crater and measurements indicated that levels were above the healthy (non-hazardous) threshold of 5 parts per million; differential optical absorption spectroscopy (DOAS) measurements indicated an average flux of 190 tons per day on 11 February. During clear periods the largest solfatara on the NNW part of the crater floor was visible and ranged in temperature from 46 to 66 degrees Celsius based on handheld instruments. Crater incandescence, originating from the solfatara, was visible at night. The Alert Level remained at 2 (on a scale of 1-4), and visitors were warned to stay outside of a 1-km radius of the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ahyi
Unrest at Ahyi Seamount continued during 7-14 February. Pressure sensors on Wake Island, 2,270 km E of Ahyi Seamount, occasionally detected possible activity including possible explosions during 13-14 February. No activity was identified in satellite images, though the image resolutions were too low to detect water discoloration. The Aviation Color Code remained at Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level remained at Advisory (the second lowest level on a four-level scale).
Source: US Geological Survey
Report for Cotopaxi
IG reported that the eruption at Cotopaxi continued during 7-14 February, characterized by daily or almost daily emissions of gas, steam, and ash; inclement weather conditions occasionally prevented views. Gas-and-ash emissions rose as high as 2 km above the crater rim and drifted NW, W, and E during 7-10 February. Minor ashfall was reported in the parish of Tambillo (32 km NNW), Mejia region, on 10 February. Steam-and-gas emissions rose to 1 km and drifted W and SW on 11 February. Gas-and-ash plumes rose around 500 m on 12 February and drifted SW. Minor amounts of ash fell in El Chasqui (17 km W), Mulaló (19 km SW), and San Juan de Pastocalle (20 km WSW). During 13-14 February several steam-and-ash emissions rose as high as 1 km and drifted W and SW. Minor ashfall was reported in Mulaló, San Agustín (11 km W), Ticatilín (15 km WSW), San Ramón (17 km SW), Control Caspi (20 km WSW), and in Pastocalle (22 km W). Servicio Nacional de Gestión de Riesgos y Emergencias (SNGRE) maintained the Alert Level at Yellow (the second lowest level on a four-color scale).
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Servicio Nacional de Gestión de Riesgos y Emergencias (SNGRE)
Report for Dukono
PVMBG reported that white-and-gray plumes of variable densities rose from Dukono as high as 150 m above the summit and drifted S and E on 8 and 10 February. Inclement weather conditions sometimes prevented visual observations. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ebeko
KVERT reported that moderate activity at Ebeko was ongoing during 2-9 February. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions during 4-5 and 7-8 February generated ash plumes that rose as high as 4.5 km (14,800 ft) a.s.l. and drifted NE and E. Ashfall was reported in Severo-Kurilsk on 5 and 8 February. A thermal anomaly was identified in satellite images on 8 February. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Great Sitkin
AVO reported that a 6 February satellite image confirmed continuing lava effusion at Great Sitkin and growth of the flow field to the E; effusion likely continued during 7-14 February. Weather clouds often obscured satellite and webcam views, though steam emissions were observed during 8 and 11-12 February. Seismicity was low most of the week; a network outage began at 2120 on 12 February and prevented transmission of seismic data. The Volcano Alert Level remained at Watch (the second highest level on a four-level scale) and the Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Huaynaputina
IGP reported that on 4 February a small-to-medium lahar descended the El Volcán drainage, on the S flank of Huaynaputina, and traveled to within 500 m of Quinistaquillas, in the province of Sánchez Cerro, Moquegua region.
Source: Instituto Geofísico del Perú (IGP)
Report for Ibu
PVMBG reported that the eruption at Ibu continued during 7-14 February. White-and-gray plumes of variable densities rose as high as 800 m above the summit and drifted NE and NW during 6-7 February. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater and 3.5 km away on the N side.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kerinci
PVMBG reported that the eruption at Kerinci was ongoing during 8-14 February. Ash plumes were visible on most days, though weather conditions prevented views towards the end of the week. At 0724 on 8 February a gray ash plum rose 150 m above the summit and drifted E. Gray-to-brown ash plumes rose 150 m and drifted NE that same day. White-and-gray ash plumes rose 150 m and drifted NE during 9-10 February. At 1740 on 10 February a dense gray ash plume rose around 100 m and drifted E, and on 14 February white-and-brown ash plumes rose 200 m and drifted NE. The Alert Level remained at 2 (on a scale of 1-4) and the public was reminded to stay 3 km away from the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kilauea
HVO reported that lava continued to erupt from three locations on Kilauea’s Halema’uma’u Crater floor during 7-14 February. The lava lake in E half of the crater was active and remained at about 10 hectares in size. A small 3-6 m high lava fountain in the S part of the E lake was active during the first few days but had diminished during 10-11 February and remained at lower levels during the rest of the week. The smaller western lake in the basin of the 2021–2022 lava lake as well as the smaller lava pond in the central portion of the crater floor remained active and overflowed frequently each day. Activity in the southern small lava pond had decreased. During 12-14 February a small lava fountain was visible in the smaller central lava pond and was active along with the fountain in the S part of the E lake. Lava continued to overflow the pond and possibly connected to the larger E lava lake. The Volcano Alert Level remained at Watch (the second highest level on a four-level scale) and the Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Lewotolok
PVMBG reported that the eruption at Lewotolok was ongoing during 7-14 February. Minor crater incandescence at the summit was visible in most of the daily webcam images posted with the daily PVMBG reports. A webcam image captured at 2140 on 11 February showed Strombolian activity. White-and-gray plumes rose as high as 300 m above the crater rim and drifted NE, E, and SE on each day except 9-10 and 14 February due to weather clouds. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 2 km away from the summit crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Marapi
PVMBG reported that the eruption at Marapi continued during 8-14 February. White, gray, and black plumes rose as high as 400 m and drifted SW and S on 10 February. At 1827 a dense black ash plume rose 400 m and drifted NE and E. White-and-gray plumes that were sometimes dense rose as high as 200 m and drifted E and SE on 12 February. Diffuse white-and-gray plumes rose 100 m and drifted N and S on 13 February. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Merapi
BPPTKG reported that the eruption at Merapi continued during 3-9 February and seismicity remained at high levels. The SW lava dome produced five lava avalanches that traveled as far as 1.8 km down the SW flank (upstream in the Kali Bebeng drainage) and one pyroclastic flow traveled 1.5 km SW (on 8 February). No significant morphological changes to the central and SW lava domes were evident in webcam images. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 3-7 km away from the summit based on location.
Source: Balai Penyelidikan dan Pengembangan Teknologi Kebencanaan Geologi (BPPTKG)
Report for Semeru
PVMBG reported that the eruption at Semeru continued during 6-12 February. Somewhat dense to dense white-and-gray ash plumes rose 300-500 m above the summit and drifted N and NE, though weather conditions often prevented visual observations. At 0623 on 11 February a white-and-brown ash plume rose 600 m above the summit, and at 0754 a dense white-to-gray ash plume rose 600 m and drifted E. At 0527 on 14 February a somewhat-dense, white-to-gray ash plume rose around 800 m. Avalanches of material were detected during the week and sometimes roaring was heard, but they were rarely seen due to weather. Deformation fluctuated and was characterized by overall inflation. The number of earthquakes increased. The Alert Level remained at 3 (on a scale of 1-4). The public was warned to stay at least 5 km away from the summit in all directions, 13 km from the summit to the SE, 100 m away from the banks of the Kobokan drainage as far as 17 km from the summit, and to avoid other drainages originating on Semeru, including the Bang, Kembar, and Sat, due to lahar, avalanche, and pyroclastic flow hazards.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Semisopochnoi
AVO reported that eruptive activity at Semisopochnoi’s Mount Young continued during 7-14 February. Seismicity was low, and a few local earthquakes were recorded during 7-8 February. Steam emissions were visible in webcam images almost daily though views were often cloudy. The Aviation Color Code remained at Orange (the second highest level on a four-color scale) and the Volcano Alert Level remained at Watch (the second highest level on a four-level scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Sheveluch
KVERT reported that the ongoing eruption at Sheveluch during 2-9 February was generally characterized by explosions, hot avalanches, lava-dome extrusion, and strong fumarolic activity. A daily thermal anomaly was identified in satellite images, and minor ash plumes from lava-dome collapses drifted 110 km NE on 6 February. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Dates are based on UTC times; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Suwanosejima
JMA reported that the eruption at Suwanosejima's Ontake Crater continued during 6-13 February with a total of 10 explosions recorded by the seismic network. The explosions produced eruption plumes that rose as high as 1.5 km above the crater rim and ejected large blocks as far as 400 m from the vent. Crater incandescence was observed nightly. Occasional ashfall was reported in Toshima village (3.5 km SSW). The Alert Level remained at 2 (on a 5-level scale) and residents were warned to stay 1 km away from the crater.
Source: Japan Meteorological Agency (JMA)
Report for Tangkuban Parahu
PVMBG issued a special report based on recent observations of Tangkuban Parahu. Webcam images captured from 1830 on 9 February to 0300 on 10 February showed incandescence emanating from Ecoma Crater. A team of PVMBG scientists inspected the crater during 1900-2000 on 10 February to identify the source of the incandescence. They observed intense emissions rising from Ecoma Crater, heard roaring and rumbling, and detected a strong sulfur odor, but did not see incandescence. Remote measurements of solfatara temperatures in Ecoma Crater using thermal cameras show varying temperatures, with a maximum of 105 degrees Celsius, and were influenced by airflow conditions at the crater. A multi-gas detector did not record high concentrations of volcanic gases. Seismic data from June 2022 to February 2023 suggested variable rates of fluid movement and increased heating of the subsurface to the surface. Data from monitoring instruments and visual observations indicated that the incandescent was not caused by rising magma and instead by reactions of sulfur deposits around the vents; the Alert Level remained at 1 (on a scale of 1-4) and tourists were advised to avoid descending into the craters.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Villarrica
The eruption at Villarrica was ongoing during 6-12 February. POVI reported that three explosions were heard during 1940-1942 on 6 February, and then hours later spatter was seen rising 30 m above the crater rim. On 9 February lava fountains were seen rising around 50 m above the crater rim. SERNAGEOMIN noted that in the early part of the week small Strombolian explosions and gas emissions were recorded and observed in webcam images. A period of increased seismicity was recorded on 12 February, after several weeks of stable levels. The seismicity and recent visual observations (especially ash emissions observed on 27 January) indicated that activity was localized at shallow levels, without a clear indication of deep magmatic contribution. The Alert Level remained at Yellow (the second lowest level on a four-color scale). ONEMI maintained the Alert Level at Yellow (the middle level on a three-color scale) for the municipalities of Villarrica, Pucón (16 km N), Curarrehue, and the commune of Panguipulli.
Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI), Proyecto Observación Villarrica Internet (POVI), Servicio Nacional de Geología y Minería (SERNAGEOMIN)