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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 April-14 April 2015
Name Country Eruption Start Date Report Status
Chirinkotan Russia New
Semeru Indonesia 2017 Jun 6 New
Tungurahua Ecuador New
Villarrica Chile 2014 Dec 2 ± 7 days New
Aira Japan 2017 Mar 25 Continuing
Chirpoi Russia Continuing
Colima Mexico Continuing
Dukono Indonesia 1933 Aug 13 Continuing
Etna Italy 2022 Nov 27 Continuing
Karymsky Russia Continuing
Kerinci Indonesia Continuing
Kilauea United States Continuing
Klyuchevskoy Russia Continuing
Popocatepetl Mexico 2005 Jan 9 Continuing
San Miguel El Salvador Continuing
Sheveluch Russia 1999 Aug 15 Continuing
Shishaldin United States Continuing
Slamet Indonesia Continuing
Suwanosejima Japan 2004 Oct 23 Continuing
Ubinas Peru Continuing
Zhupanovsky Russia Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,140 individual reports over 1,221 weeks (average of 16 per week) on 334 different volcanoes.

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Agung Cotopaxi Iliamna Little Sitkin Poas Sulu Range
Ahyi Cuicocha Iliwerung Llaima Popocatepetl Sumbing
Aira Cumbal Inielika Lokon-Empung Purace Sundoro
Akan Dabbahu Ioto Lonquimay Puyehue-Cordon Caulle Suoh
Alaid Davidof Irazu Lopevi Rabaul Suretamatai
Alu-Dalafilla Dempo Iya Machin Raikoke Suwanosejima
Ambae Descabezado Grande Izu-Torishima Makushin Ranakah Taal
Ambang Dieng Volcanic Complex Jackson Segment Maly Semyachik Raoul Island Tair, Jebel at
Ambrym Dukono Kaba Manam Rasshua Takawangha
Anatahan East Epi Kadovar Manda Hararo Raung Talang
Aniakchak Ebeko Kaitoku Seamount Marapi Redoubt Tambora
Antillanca Volcanic Complex Ebulobo Kama'ehuakanaloa Maroa Reventador Tanaga
Antuco Edgecumbe Kambalny Martin Reykjanes Tandikat-Singgalang
Apoyeque Egon Kanaga Masaya Rincon de la Vieja Tangkoko-Duasudara
Arenal Ekarma Kanlaon Maule, Laguna del Rinjani Tangkuban Parahu
Asamayama Eldey Karangetang Mauna Loa Ritter Island Tara, Batu
Askja Erebus Karkar Mayon Rotorua Ta'u
Asosan Erta Ale Karthala McDonald Islands Ruang Taupo
Atka Volcanic Complex Etna Karymsky Melebingoy Ruapehu Telica
Augustine Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruby Tenerife
Avachinsky Eyjafjallajokull Katla Merapi Ruiz, Nevado del Tengger Caldera
Awu Fagradalsfjall Katmai Midagahara Sabancaya Three Sisters
Axial Seamount Fernandina Kavachi Misti, El Sakar Tinakula
Azul, Cerro Fogo Kelimutu Miyakejima Salak Tofua
Azumayama Fonualei Kelud Momotombo San Cristobal Tokachidake
Bagana Fournaise, Piton de la Kerinci Monowai San Miguel Tolbachik
Balbi Fourpeaked Ketoi Montagu Island San Vicente Toliman
Bamus Fuego Kharimkotan Moyorodake [Medvezhia] Sangay Tongariro
Banda Api Fujisan Kick 'em Jenny Mutnovsky Sangeang Api Trident
Bardarbunga Fukutoku-Oka-no-Ba Kie Besi Myojinsho Santa Ana Tungurahua
Barren Island Galeras Kikai Nabro Santa Maria Turrialba
Batur Galunggung Kilauea Negra, Sierra Sao Jorge Ubinas
Bezymianny Gamalama Kirishimayama Negro, Cerro Sarigan Ugashik-Peulik
Bogoslof Gamkonora Kita-Ioto Nightingale Island Sarychev Peak Ukinrek Maars
Brava Gareloi Kizimen Nishinoshima Saunders Ulawun
Bristol Island Gaua Klyuchevskoy Nisyros Savo Unnamed
Bulusan Gorely Kolokol Group Novarupta Semeru Unnamed
Calbuco Great Sitkin Koryaksky NW Rota-1 Semisopochnoi Veniaminof
Callaqui Grimsvotn Krakatau Nyamulagira Seulawah Agam Villarrica
Cameroon Guagua Pichincha Krummel-Garbuna-Welcker Nyiragongo Sheveluch Vulcano
Campi Flegrei Guallatiri Krysuvik-Trolladyngja Ofu-Olosega Shishaldin West Mata
Campi Flegrei del Mar di Sicilia Guntur Kuchinoerabujima Okataina Simbo Westdahl
Cayambe Hachijojima Kurikomayama Okmok Sinabung Whakaari/White Island
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Ontakesan Sinarka Witori
Chaiten Heard Kverkfjoll Oraefajokull Siple Wolf
Chiginagak Hekla La Palma Osorno Sirung Wrangell
Chikurachki Helgrindur Lamington Pacaya Slamet Yakedake
Chiles-Cerro Negro Hierro Lamongan Pagan Snaefellsjokull Yasur
Chillan, Nevados de Hokkaido-Komagatake Langila Palena Volcanic Group Soputan Yufu-Tsurumi
Chirinkotan Home Reef Lanin Paluweh Sorikmarapi Zaozan [Zaosan]
Chirpoi Hood Lascar Panarea Sotara Zavodovski
Ciremai Huaynaputina Late Papandayan Soufriere Hills Zhupanovsky
Cleveland Hudson, Cerro Lateiki Pavlof Soufriere St. Vincent Zubair Group
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
 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 Chirinkotan
SVERT reported that on 6 April a thermal anomaly over Chirinkotan was detected in satellite images. Weak gas-and-steam emissions were noted on 8 April. Cloud cover prevented views of the volcano on the other days during 7-13 April. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Semeru
PVMBG reported that during 1 January-10 April white and gray plumes were observed rising above Semeru even though inclement weather sometimes prevented visual observations. During January white plumes and nine instances of grayish-white plumes rose 200-500 m above the crater. Seven incandescent avalanches from a lava-flow front traveled at most 300 m down the flank. In February white plumes and 19 instances of grayish-white plumes rose 200-600 m above the crater. Eruption sounds were reported five times. In March white plumes and 21 instances of grayish-white plumes rose 200-500 m above the crater. Nine explosions were heard. During 1-10 April there were 18 instances of grayish-white emissions. Seismicity from 1 January through 10 April fluctuated, and was dominated by emission and explosion signals. 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 Tungurahua
IG reported that minor ash emissions from Tungurahua were seen almost daily during 8-14 April, although cloud cover often prevented visual observations. During 7-8 April ash emissions rose 500-800 m above the crater and drifted NW, W, and SW; ashfall was reported in Quero (20 km NW), Guanto, Guazmo, Mirador, Santuario, and in the sectors of El Manzano (8 km SW), Pillate (8 km W), and Choglontus (13 km WSW). Ashfall was reported in Chonglontus on 9 April. Later that day a plume with low ash content drifted W. During 9-10 April seismicity increased to a high level, and "drumbeat" events were detected there for the first time during 16 years of monitoring. Ashfall was reported in El Manzano and Chonglontus. On 11 April an emission with low ash content drifted W. On 13 April a steam-and-ash plume drifted W and SW, causing ashfall in El Manzano. On 14 April an emission with low ash content drifted W; ash fell in Mapayacu.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Report for Villarrica
OVDAS-SERNAGEOMIN reported that infrasound data indicated explosions at Villarrica on 8 April. The next day seismicity increased and acoustic signals suggested discontinuous Strombolian activity and an oscillating lava lake in the crater. Gas emissions and nighttime incandescence from the crater were observed; this activity continued through 14 April. The Alert Level remained at Orange (the second highest level on a four-color scale) and the public was warned to stay outside of a 5-km radius around the crater and away from drainages.
Sources: Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI), Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Report for Aira
JMA reported that 15 explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m during 6-10 April. Incandescence from the crater was visible at night on 7 and 9 April, and inflation continued to be detected. The Alert Level remained at 3 (on a scale of 1-5). Based on JMA notices, the Tokyo VAAC reported that explosions during 8-13 April generated plumes which rose to altitudes of 1.5-3 km (5,000-10,000 ft) a.s.l. and drifted in multiple directions. Pilots observed ash plumes that rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) and drifted E and SE during 10-11 April.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Chirpoi
SVERT reported that satellite images over Snow, a volcano of Chirpoi, detected a thermal anomaly during 8-11 April. Cloud cover obscured views on other days during 7-13 April. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Report for Colima
Based on satellite images, and webcam views, Mexico City MWO notices, and wind data, the Washington VAAC reported multiple ash emissions per day from Colima during 8-10 and 13-14 April. Ash plumes rose to altitudes of 5.5-8.5 km (18,000-28,000 ft) a.s.l. and drifted in varied directions during 9-10 and 13-14 April.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Report for Dukono
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 8-10 and 12-14 April ash plumes from Dukono rose to altitudes of 2.4-2.7 km (8,000-9,000 ft) a.s.l. and drifted 35-75 km NE, E, and SE.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Etna
INGV reported that on 12 April two explosions from the W part of Etna’s Bocca Nuova Crater were recorded within a 3-minute period beginning at 1505. Resulting ash puffs rose a few hundred meters above the crater and dispersed.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
Report for Karymsky
KVERT reported that during 3-10 April moderate activity at Karymsky continued. Satellite images detected ash plumes drifting 85 km SE on 3 April, and a thermal anomaly over the volcano on 9 April. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Kerinci
PVMBG reported that on 2 June 2013 an eruption at Kerinci from 0843 to 0848 generated an ash plume that rose 1 km above the crater. Ashfall as thick as 5 mm was reported in areas E, including Tangkil. During 1 February-13 April 2015 white plumes rose 50-150 m and drifted E and W. The Alert Level remained at 2 (on a scale of 1-4). Residents and visitors were advised not to enter an area within 3 km of the summit.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Kilauea
During 8-14 April HVO reported that Kilauea’s 27 June NE-trending lava flow continued to be active with three areas of breakouts within and along the flow-field margins. The three main areas of breakouts were the 21 February breakout on the flank of Pu'u 'O'o, the 9 March breakout near the forested cone of Kahauale'a, and a relatively small forked breakout 5-6 km farther NE of Pu'u 'O'o. The circulating lava lake occasionally rose and fell in the deep pit within Halema'uma'u Crater. Gas emissions remained elevated. A lava flow from a vent at the S edge of Pu'u 'O'o began at 1700 on 7 April and remained active through 9 April.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Report for Klyuchevskoy
KVERT reported that gas-and-steam emissions at Klyuchevskoy increased at 0840 on 13 April and continued at least through 1215 on 14 April. Incandescence at the summit was indicative of renewed Strombolian activity. The Aviation Color Code was raised to Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Popocatepetl
CENAPRED reported that after a series of explosions ended at 1200 on 7 April the seismic network at Popocatépetl recorded 78 low-intensity emissions through 1100 on 8 April; gas-and-steam plumes containing small amounts of ash drifted SE. Also during this period 93 explosions occurred, and 12 minutes of harmonic tremor were detected on 8 April. During 8-14 April the seismic network recorded 20-112 gas, steam, and ash emissions, and nighttime crater incandescence was often noted. On 9 and 10 April the network detected 41 and 120 minutes of harmonic tremor, respectively. During an overflight on 10 April scientists confirmed that a lava dome was emplaced in the bottom of the crater between 24 March and 4 April. The lava dome was at least 250 m in diameter and 30 m thick. The surface of the dome had concentric fractures and the central part was collapsed from deflation. Explosions were detected during 13-14 April. The Alert Level remained at Yellow, Phase Two.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Report for San Miguel
SNET reported that at 1515 on 11 April a small explosion at San Miguel generated a gas-and-ash plume that rose 800 m and quickly dissipated to the SW. Minor ashfall (1 mm thick) was reported WSW of the crater, in La Piedra, Moritas, and San Jorge.
Source: Servicio Nacional de Estudios Territoriales (SNET)
Report for Sheveluch
KVERT reported that during 3-10 April lava-dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot block avalanches, and fumarolic activity. Strong explosions on 3 and 7 April generated ash plumes that rose to altitudes of 9 and 12 km (32,800 ft) a.s.l., and drifted 100 km SE and more than 450 km NE, respectively. A daily thermal anomaly was also visible in satellite images. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Shishaldin
AVO reported that seismicity at Shishaldin continued to be elevated over background levels during 8-14 April. They interpreted those data as indicating that low-level eruptive activity confined to the summit crater likely continued. Cloud cover frequently prevented satellite and webcam observations. 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 Slamet
PVMBG reported that during 1 February-10 April dense white plumes rose 50-800 m above Slamet's crater. Seismicity consisted of emission signals and tremor; emission signals started to increase on 18 February and periods of continuous tremor were recorded during 21-22 and 28-29 March. RSAM values fluctuated but rose overall. The Alert Level remained at 2 (on a scale of 1-4). Residents and tourists were warned to not approach the crater within a radius of 2 km.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Suwanosejima
Based on JMA notices, the Tokyo VAAC reported that an eruption at Suwanose-jima on 13 April generated a plume that rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted N.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Report for Ubinas
INGEMMET's Observatorio Vulcanológico (OVI) reported that after a decline in activity at Ubinas during the previous five months two phreatic explosions were detected on 8 April. The explosions occurred at 0424 and 0550, generated ash-and-gas plumes that rose 2-2.5 km above the crater and drifted SE. According to Observatorio Volcanológico del Sur (OVS) snowmelt during 12-13 April led to large lahars that descended the S flank. A report on 13 April noted that large volumes of ash continued to be emitted during the previous 48 hours.
Sources: Instituto Geofísico del Perú (IGP), Instituto Geológico Minero y Metalúrgico (INGEMMET)
Report for Zhupanovsky
KVERT reported that a moderate explosive eruption at Zhupanovsky continued during 3-10 April. Satellite images detected ash plumes drifting 25 km SE on 3 April and a thermal anomaly over the volcano on 9 April. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)