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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 1 March-7 March 2023
Name Country Volcanic Province Eruption Start Date Report Status
Aniakchak United States Alaska Peninsula Volcanic Arc New
Karangetang Indonesia Sangihe Volcanic Arc New
Suwanosejima Japan Ryukyu Volcanic Arc 2004 Oct 23 New
Tanaga United States Aleutian Ridge Volcanic Arc New
Trident United States Alaska Peninsula Volcanic Arc New
Ahyi United States Mariana Volcanic Arc Continuing
Aira Japan Ryukyu Volcanic Arc 2017 Mar 25 Continuing
Atka Volcanic Complex United States Aleutian Ridge Volcanic Arc Continuing
Cotopaxi Ecuador Andean Northern Volcanic Arc Continuing
Dieng Volcanic Complex Indonesia Sunda Volcanic Arc Continuing
Ebeko Russia Kuril Volcanic Arc 2022 Jun 11 Continuing
Great Sitkin United States Aleutian Ridge Volcanic Arc 2021 May 25 Continuing
Kilauea United States Hawaiian-Emperor Hotspot Volcano Group Continuing
Lewotolok Indonesia Sunda Volcanic Arc 2020 Nov 27 Continuing
Marapi Indonesia Sunda Volcanic Arc 2023 Dec 3 Continuing
Merapi Indonesia Sunda Volcanic Arc 2020 Dec 31 Continuing
Nevado del Ruiz Colombia Andean Northern Volcanic Arc 2014 Nov 18 Continuing
Papandayan Indonesia Sunda Volcanic Arc Continuing
Semeru Indonesia Sunda Volcanic Arc 2017 Jun 6 Continuing
Sheveluch Russia Eastern Kamchatka Volcanic Arc 1999 Aug 15 Continuing
Takawangha United States Aleutian Ridge Volcanic Arc Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,299 individual reports over 1,228 weeks (average of 17 per week) on 335 different volcanoes.

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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 Suoh
Alu-Dalafilla Dempo Iya Machin Rabaul Suretamatai
Ambae Descabezado Grande Izu-Torishima Makushin Raikoke Suwanosejima
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Ranakah Taal
Ambrym Dukono Kaba Manam Raoul Island Tair, Jebel at
Anatahan East Epi Kadovar Manda Hararo Rasshua Takawangha
Aniakchak Ebeko Kaitoku Seamount Marapi Raung Talang
Antillanca Volcanic Complex Ebulobo Kama'ehuakanaloa Maroa Redoubt Tambora
Antuco Edgecumbe Kambalny Martin Reventador Tanaga
Apoyeque Egon Kanaga Masaya Reykjanes Tandikat-Singgalang
Arenal Ekarma Kanlaon Matthew Island Rincon de la Vieja Tangkoko-Duasudara
Asamayama Eldey Karangetang Maule, Laguna del Rinjani Tangkuban Parahu
Askja Erebus Karkar Mauna Loa Ritter Island Tara, Batu
Asosan Erta Ale Karthala Mayon Rotorua Ta'u
Atka Volcanic Complex Etna Karymsky McDonald Islands Ruang Taupo
Augustine Etorofu-Yakeyama [Grozny Group] Kasatochi Melebingoy Ruapehu Telica
Avachinsky Eyjafjallajokull Katla Melimoyu Ruby Tenerife
Awu Fagradalsfjall Katmai Merapi Ruiz, Nevado del Tengger Caldera
Axial Seamount Fernandina Kavachi Midagahara Sabancaya Three Sisters
Azul, Cerro Fogo Kelimutu Misti, El Sakar Tinakula
Azumayama Fonualei Kelud Miyakejima Salak Tofua
Bagana Fournaise, Piton de la Kerinci Momotombo San Cristobal Tokachidake
Balbi Fourpeaked Ketoi Monowai San Miguel Tolbachik
Bamus Fuego Kharimkotan Montagu Island San Vicente Toliman
Banda Api Fujisan Kick 'em Jenny Moyorodake [Medvezhia] Sangay Tongariro
Bardarbunga Fukutoku-Oka-no-Ba Kie Besi Mutnovsky Sangeang Api Trident
Barren Island Galeras Kikai Myojinsho Santa Ana Tungurahua
Batur Galunggung Kilauea Nabro Santa Maria Turrialba
Bezymianny Gamalama Kirishimayama Negra, Sierra Sao Jorge Ubinas
Bogoslof Gamkonora Kita-Ioto Negro, Cerro Sarigan Ugashik-Peulik
Brava Gareloi Kizimen Nightingale Island Sarychev Peak Ukinrek Maars
Bristol Island Gaua Klyuchevskoy Nishinoshima Saunders Ulawun
Bulusan Gorely Kolokol Group Nisyros Savo Unnamed
Calbuco Great Sitkin Koryaksky Novarupta Semeru Unnamed
Callaqui Grimsvotn Krakatau NW Rota-1 Semisopochnoi Veniaminof
Cameroon Guagua Pichincha Krummel-Garbuna-Welcker Nyamulagira Seulawah Agam Villarrica
Campi Flegrei Guallatiri Krysuvik-Trolladyngja Nyiragongo Sheveluch Vulcano
Campi Flegrei del Mar di Sicilia Guntur Kuchinoerabujima Ofu-Olosega Shishaldin West Mata
Cayambe Hachijojima Kurikomayama Okataina Simbo Westdahl
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Okmok Sinabung Whakaari/White Island
Chaiten Heard Kverkfjoll Ontakesan Sinarka Witori
Chiginagak Hekla La Palma Oraefajokull Siple Wolf
Chikurachki Helgrindur Lamington Osorno Sirung Wrangell
Chiles-Cerro Negro Hierro Lamongan Pacaya Slamet Yakedake
Chillan, Nevados de Hokkaido-Komagatake Langila Pagan Snaefellsjokull Yasur
Chirinkotan Home Reef Lanin Palena Volcanic Group Soputan Yufu-Tsurumi
Chirpoi Hood Lascar Paluweh Sorikmarapi Zaozan [Zaosan]
Ciremai Huaynaputina Late Panarea Sotara Zavodovski
Cleveland Hudson, Cerro Lateiki Papandayan Soufriere Hills Zhupanovsky
Colima Huila, Nevado del Lengai, Ol Doinyo Pavlof Soufriere St. Vincent Zubair Group
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 Aniakchak
AVO reported that the earthquake swarm at Aniakchak was ongoing with 120 earthquakes located during 25 February-3 March. Magnitudes were as high as M3.1 and several earthquakes had magnitudes between M2 and M3. The earthquakes were located at shallow depths (less than 5 km) and below the S part of the caldera and to the E of the volcano. Daily, small, shallow earthquakes with magnitudes as high as M2.7 were recorded during 4-7 March. 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 Alaska Volcano Observatory (AVO)
Report for Karangetang
According to PVMBG the eruption at Karangetang’s Main Crater (S crater) continued during 1-7 March. Nighttime webcam images posted with daily reports showed flows of incandescent material descending the flanks, though incandescence decreased towards the end of the week. 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 Suwanosejima
JMA reported that the number of explosions at Suwanosejima's Ontake Crater began to increase on 2 February and further increased on 2 March. Activity intensified and a total of 25 explosions were recorded during 1-5 March. Ash plumes rose as high as 1.4 km above the crater rim and large blocks were ejected as far as 500 m from the vent. Crater incandescence was visible at night. Occasional ashfall and rumbling noises were reported in Toshima village (3.5 km SSW). Since large blocks could be ejected further than the restricted zone of 1 km, JMA raised the Alert Level to 3 (on a 5-level scale) at 0640 on 5 March and warned the public to stay 2 km away from the crater. Explosions continued during 5-7 March. Ash plumes rose as high as 2 km above the crater rim and large blocks were ejected as far as 500 m.
Source: Japan Meteorological Agency (JMA)
Report for Tanaga
At 2215 on 7 March AVO raised the Aviation Color Code for Tanaga to Yellow and the Volcano Alert Level to Advisory due to increased seismicity. Earlier that afternoon, starting at about 1330, seismicity began to increase and by around 2045 earthquakes were occurring at a rate of 2-3 per minute. The events were located at shallow depths and the largest events were M2-3.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Trident
AVO reported that the earthquake swarm at Trident was ongoing during 1-7 March. Daily small earthquakes with magnitudes less than 1 were recorded at a rate of about 1-5 per day. 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 Alaska Volcano Observatory (AVO)
Report for Ahyi
Unrest at Ahyi Seamount continued during 1-7 March. Plumes of discolored water above the seamount were visible in satellite images during 1-2 and 4 March. Pressure sensors on Wake Island, 2,270 km E of Ahyi Seamount, did not detect activity. 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 Aira
JMA reported ongoing eruptive activity at Minamidake Crater and Showa Crater (at Aira Caldera’s Sakurajima volcano) during 27 February-6 March. Incandescence was visible nightly at Minamidake and during 3-6 March at Showa. Explosions at Minamidake were recorded on 28 February and 1, 3, and 4 March, and non-explosive eruptive events were occasionally recorded. Eruption plumes rose as high as 2.8 km above the Minamidake Crater rim and large blocks were ejected as far as 1.3 km from the vent. Non-explosive eruptive events were occasionally recorded at Showa during 27 February-2 March and four explosions occurred during 3-6 March. Eruption plumes rose as high as 2.7 km above the Showa rim and large blocks were ejected 500-800 m from the vent. Sulfur dioxide emissions were extremely high at 3,500 tons per day on 2 March. The Alert Level remained at 3 (on a 5-level scale), and residents were warned to stay 2 km away from both craters.
Source: Japan Meteorological Agency (JMA)
Report for Atka Volcanic Complex
On 2 March AVO changed both the Aviation Color Code and Volcano Alert Level for the Atka Volcanic Complex to Unassigned, due to a data outage. The loss of data flow from seismic stations made AVO unable to assess whether the volcano is at its normal background state.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Cotopaxi
IG reported that the eruption at Cotopaxi continued during 28 February-7 March. Several daily ash, gas, and steam plumes rose as high as 1.5 km above the summit during 28 February-2 March and drifted W and SW. Minor ashfall was reported in Mulaló parish (Colcas-Ticatilín) of the Latacunga canton during the afternoon of 28 February. Steam-and-gas emissions were visible rising as high as 700 m and drifting SW and W during 3-7 March. Minor ashfall was reported in Mulaló parish on 5 March. 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 Dieng Volcanic Complex
On 6 March PVMBG lowered the Alert Level for the Dieng Volcanic Complex to 1 (on a scale of 1-4) due to decreased carbon dioxide emissions. During the first half of January carbon dioxide emissions were elevated at Timbang Crater and then significantly increased in mid-January; recent measurements indicated a decreasing trend. On 22 February a mobile instrument measured 112,000 ppm CO2 at the crater, though the concentration dropped to 9,200 ppm at a distance of less than 10 m from the crater rim. Measurements at the multi-gas station indicated concentration of 1,500-1,900 parts per million (ppm). The public was warned to stay 500 m away from Sileri Crater and to stay out of Timbang Crater, and to take caution when digging in the ground as gasses could be released from the soil.
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 23 February-2 March. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E) explosions during 24 and 26-27 February and on 2 March generated ash plumes that rose as high as 4 km (13,100 ft) a.s.l. and drifted E. Ashfall was reported in Severo-Kurilsk on 27 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 slow lava effusion at Great Sitkin likely continued during 1-7 March. Satellite images and web camera views were cloudy. Seismicity was low. The Aviation Color Code and the Volcano Alert Level remained at Orange and Watch, respectively.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Kilauea
HVO reported that the eruption on the floor of Kilauea’s Halema’uma’u Crater continued during 1-6 March but at a decreased rate. The western lake in the basin of the 2021-2022 lava lake remained weakly active; a few lava flows were visible on 1 March. A small amount of lava circulated within the lake and there were intermittent crustal overturns, but the lake was mostly crusted over and the active area got substantially smaller through the week; by 5 March the lake was completely crusted over. Minor lava ooze outs were visible on 6 March, and the eruption had paused by 7 March. 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 1-7 March. White-and-gray plumes rose as high as 400 m above the summit and drifted E and SE on 2 and 7 March. On most of the other days white gas plumes were seen rising as high as 100 m and drifting E and SE. 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 (on Sumatra) continued during 1-7 March. On 2 March white steam-and-gas plumes rose 100 m from the summit and drifted NW, SW, and E, and on 4 March white-and-gray plumes rose 200 m and drifted N and NE; weather clouds prevented visual observations on the other days. 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 (on Java) continued during 24 February-2 March and seismicity remained at high levels. The SW lava dome produced two lava avalanches that traveled as far as 1 km down the SW flank (upstream in the Bebeng and Boyong drainages). 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 Nevado del Ruiz
Servicio Geológico Colombiano (SGC) reported that seismicity at Nevado del Ruiz began increasing on 27 February characterized by events indicting fluid movement. The elevated seismicity was sustained. On 4 March the intensity of the signals intensified and were associated with mostly continuous ash emissions with occasional pulses. Ashfall was reported in Manizales (27 km NW). The Alert Level remained at 3 (Yellow; the second lowest level on a four-color scale).
Source: Servicio Geológico Colombiano (SGC)
Report for Papandayan
PVMBG issued a special report based on recent observations of Papandayan. The number of shallow volcanic earthquakes had increased in January and although the numbers fluctuated, low-frequency earthquakes also increased overall during January and February. Webcam images from the camera in the parking area showed incandescence emanating from Kawah Baru during the night on 22 February. A team of PVMBG scientists inspected the crater during 2100-2300 on an unspecified date to identify the source of the incandescence. They observed intense emissions rising from Kawah Baru, heard faint rumbling, and detected a strong sulfur odor, but did not see incandescence. Gas plumes rose 300 m from a solfatara. The color of the lake in Kawah Baru was greenish. Rumbling sounds from both the Kawah Mas and Kawah Baru solfatara complexes varied from weak to strong and gas emissions were sometimes intense. Solfatara temperatures were variable at Kawah Mas, Kawah Manuk, and Kawah Baru with a maximum temperature of 123.8 degrees Celsius. Sulfur dioxide gas concentrations were high at a distance of 500 m from the solfatara complexes. Based on the field observations PVMBG concluded that conditions at Papandayan were relatively normal. The Alert Level remained at 1 (on a scale of 1-4) and tourists were advised to stay 500 m away from the active craters.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Semeru
PVMBG reported that the eruption at Semeru continued during 1-7 March. Weather clouds sometimes prevented views of the volcano, though on most days no emissions were visible. On 6 March white-and-gray ash plumes rose as high as 200 m above the summit and drifted N and NE. 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 Sheveluch
KVERT reported that the ongoing eruption at Sheveluch was generally characterized by explosions, hot avalanches, lava-dome extrusion, and strong fumarolic activity. A daily thermal anomaly was identified in satellite images during 23 February-2 March. At 1150 on 5 March local time video images showed an ash plume generated by hot avalanches rising 5.5 km a.s.l. (just over 2.2 km above the summit) and drifting 5 km NE. 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 Takawangha
AVO reported that the earthquake swarm at Takawangha that began in November 2022 was ongoing with 120 earthquakes located during 25 February-3 March. The number of events per day was highest on 28 February and 1 March, with over 50 earthquakes located on each of those days. Three earthquakes had magnitudes greater than 3, occurred at shallow depths of less than 6 km, and were located about 6 km E of the volcano. During 3-7 March small daily earthquakes with magnitudes less than M2 occurred in the vicinity of the volcano. 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 Alaska Volcano Observatory (AVO)