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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 12 June-18 June 2024
Name Country Volcanic Province Eruption Start Date Report Status
Bezymianny Russia Eastern Kamchatka Volcanic Arc 2022 Mar 15 New
Etna Italy Sicily Volcanic Province 2022 Nov 27 New
Home Reef Tonga Tofua Volcanic Arc New
Ibu Indonesia Halmahera Volcanic Arc 2008 Apr 5 New
Lewotobi Indonesia Sunda Volcanic Arc 2023 Dec 23 New
Manam Papua New Guinea Bismarck Volcanic Arc 2018 May 10 ± 10 days New
Reykjanes Iceland Iceland Neovolcanic Rift Volcanic Province New
Aira Japan Ryukyu Volcanic Arc 2017 Mar 25 Continuing
Dukono Indonesia Halmahera Volcanic Arc 1933 Aug 13 Continuing
Ebeko Russia Kuril Volcanic Arc 2022 Jun 11 Continuing
Fuego Guatemala Central America Volcanic Arc 2002 Jan 4 Continuing
Great Sitkin United States Aleutian Ridge Volcanic Arc 2021 May 25 Continuing
Lewotolok Indonesia Sunda Volcanic Arc Continuing
Marapi Indonesia Sunda Volcanic Arc 2023 Dec 3 Continuing
Merapi Indonesia Sunda Volcanic Arc 2020 Dec 31 Continuing
Sabancaya Peru Central Andean Volcanic Arc 2016 Nov 6 Continuing
Sangay Ecuador Northern Andean Volcanic Arc 2019 Mar 26 Continuing
Santa Maria Guatemala Central America Volcanic Arc 1922 Jun 22 Continuing
Semeru Indonesia Sunda Volcanic Arc 2017 Jun 6 Continuing
Sheveluch Russia Eastern Kamchatka Volcanic Arc 1999 Aug 15 Continuing
Suwanosejima Japan Ryukyu Volcanic Arc 2004 Oct 23 Continuing
Ubinas Peru Central Andean 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 20,740 individual reports over 1,248 weeks (average of 17 per week) on 338 different volcanoes.

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Adams Cotopaxi Iliwerung Llaima Popocatepetl Sumisujima
Agung Cuicocha Inielika Lokon-Empung Purace Sundoro
Ahyi Cumbal Ioto Lonquimay Puyehue-Cordon Caulle Suoh
Aira Dabbahu Irazu Lopevi Rabaul Suretamatai
Akan Davidof Iwatesan Machin Raikoke Suwanosejima
Alaid Dempo Iya Makushin Ranakah Taal
Alu-Dalafilla Descabezado Grande Izu-Torishima Maly Semyachik Raoul Island Tair, Jebel at
Ambae Dieng Volcanic Complex Jackson Segment Manam Rasshua Takawangha
Ambang Dukono Kaba Manda Hararo Raung Talang
Ambrym East Epi Kadovar Marapi Redoubt Tambora
Anatahan Ebeko Kaitoku Seamount Maroa Reventador Tanaga
Aniakchak Ebulobo Kama'ehuakanaloa Martin Reykjanes Tandikat-Singgalang
Antillanca Volcanic Complex Edgecumbe Kambalny Masaya Rincon de la Vieja Tangkoko-Duasudara
Antuco Egon Kanaga Matthew Island Rinjani Tangkuban Parahu
Apoyeque Ekarma Kanlaon Maule, Laguna del Ritter Island Tara, Batu
Arenal Eldey Karangetang Mauna Loa Rotorua Ta'u
Asamayama Erebus Karkar Mayon Ruang Taupo
Askja Erta Ale Karthala McDonald Islands Ruapehu Telica
Asosan Etna Karymsky Melebingoy Ruby Tenerife
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Kasatochi Melimoyu Ruiz, Nevado del Tengger Caldera
Augustine Eyjafjallajokull Katla Merapi Sabancaya Three Sisters
Avachinsky Fagradalsfjall Katmai Midagahara Sakar Tinakula
Awu Fernandina Kavachi Misti, El Salak Tofua
Axial Seamount Fogo Kelimutu Miyakejima San Cristobal Tokachidake
Azul, Cerro Fonualei Kelud Momotombo San Miguel Tolbachik
Azumayama Fournaise, Piton de la Kerinci Monowai San Vicente Toliman
Bagana Fourpeaked Ketoi Montagu Island Sangay Tongariro
Balbi Fuego Kharimkotan Moyorodake [Medvezhia] Sangeang Api Trident
Bamus Fujisan Kick 'em Jenny Mutnovsky Santa Ana Tungurahua
Banda Api Fukutoku-Oka-no-Ba Kie Besi Myojinsho Santa Maria Turrialba
Bardarbunga Galeras Kikai Nabro Sao Jorge Ubinas
Barren Island Galunggung Kilauea Negra, Sierra Sarigan Ugashik-Peulik
Batur Gamalama Kirishimayama Negro, Cerro Sarychev Peak Ukinrek Maars
Bezymianny Gamkonora Kita-Ioto Nightingale Island Saunders Ulawun
Bogoslof Gareloi Kizimen Nishinoshima Savo Unnamed
Brava Gaua Klyuchevskoy Nisyros Semeru Unnamed
Bristol Island Gorely Kolokol Group Novarupta Semisopochnoi Veniaminof
Bulusan Great Sitkin Koryaksky NW Rota-1 Seulawah Agam Villarrica
Calbuco Grimsvotn Krakatau Nyamulagira Sheveluch Vulcano
Callaqui Guagua Pichincha Krummel-Garbuna-Welcker Nyiragongo Shishaldin West Mata
Cameroon Guallatiri Krysuvik-Trolladyngja Ofu-Olosega Simbo Westdahl
Campi Flegrei Guntur Kuchinoerabujima Okataina Sinabung Whakaari/White Island
Campi Flegrei del Mar di Sicilia Hachijojima Kurikomayama Okmok Sinarka Witori
Cayambe Hakoneyama Kusatsu-Shiranesan Ontakesan Siple Wolf
Chachadake [Tiatia] Heard Kverkfjoll Oraefajokull Sirung Wrangell
Chaiten Hekla La Palma Osorno Slamet Yakedake
Chiginagak Helgrindur Lamington Pacaya Snaefellsjokull Yasur
Chikurachki Hierro Lamongan Pagan Soputan Yellowstone
Chiles-Cerro Negro Hokkaido-Komagatake Langila Palena Volcanic Group Sorikmarapi Yufu-Tsurumi
Chillan, Nevados de Home Reef Lanin Paluweh Sotara Zaozan [Zaosan]
Chirinkotan Hood Lascar Panarea Soufriere Hills Zavodovski
Chirpoi Huaynaputina Late Papandayan Soufriere St. Vincent Zhupanovsky
Ciremai Hudson, Cerro Lateiki Pavlof South Sarigan Seamount Zubair Group
Cleveland Huila, Nevado del Lengai, Ol Doinyo Pelee Spurr
Colima Hunga Tonga-Hunga Ha'apai Leroboleng Peuet Sague St. Helens
Colo Ibu Lewotobi Pinatubo Stromboli
Concepcion Ijen Lewotolok Planchon-Peteroa Sulu Range
Copahue Iliamna Little Sitkin Poas Sumbing
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 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 Bezymianny
KVERT reported that a thermal anomaly over Bezymianny was identified in satellite images during 6-9 and 11-13 June. Weather clouds prevented views on 10 June. Dates are UTC; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Etna
According to news reports, video of Etna’s Voragine Crater showed gas jetting from a vent followed by spattering lava on 15 June. INGV issued a Volcano Observatory Notice for Aviation (VONA) at 2016 on 17 June raising the Aviation Color Code to Yellow (the second highest color on a four-color scale) due to increased signs of unrest. The Aviation Color Code was raised to Orange at 2025 because explosive activity at the summit craters was visible in webcam images and observed by volcanologists in the field.
Sources: Sezione di Catania - Osservatorio Etneo (INGV), Local Team
Report for Home Reef
The Tonga Geological Services reported that an intense thermal anomaly along the SE coast of Home Reef was identified in a 15 June satellite image and showed lava flowing E and expanding the coastline. Thermal anomalies continued to be detected during 16-17 June. On 17 June the Maritime Alert Level was raised to Orange (the second highest level on a four-color scale), the Aviation Color Code was raised to Yellow (the second lowest color on a four-color scale), and the Alert level for residents of Vava’u and Ha’apai remained at Green (the lowest color on a four-color scale). Thermal anomalies persisted and intensified during 17-18 June. On 18 June a satellite images indicated that gas-and-ash plumes drifted SE.
Source: Tonga Geological Services, Government of Tonga
Report for Ibu
PVMBG reported that the eruption at Ibu continued during 12-17 June with occurrences of tall ash plumes. Daily white, gray, brown, and black ash plumes rose as high as 5 km above the crater rim and drifted in multiple directions. The Alert Level remained at 4 (the highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 7 km away from the N crater wall opening.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Lewotobi
PVMBG reported that eruptive activity at Lewotobi’s Laki-laki volcano continued during 12-18 June. Multiple eruptive events were recorded daily by the seismic network daily. Daily gray or white-and-gray ash plumes rose 100-1,000 m above the summit and drifted SW, W, and NW. According to news articles ashfall was reported during 12-13 June in villages to the NW and NE, including Klatanlo (5 km NW), Hokeng Jaya (4 km NW), Persiapan Padang Pasir, Nawokote (5 km W), and Boru (8 km WNW) in the Wulanggitang District, along with Nobo (5 km NE) and Dulipali (6 km NNW) in the Ile Bura District. Workers sprayed water on several streets to wash off the ashfall. On 15 June ashfall was reported in areas to the SW including the communities of Padang Pasir, Wotupudor, and Kumaebang, and in Boru village. On 16 June ashfall affected the Frans Seda Sikka (60 km WSW) and Haji Hasan Aroeboesman Ende (126 km WSW) airports, causing disruptions to flights at Frans Seda Sikka. The Alert Level remained at 2 (the second lowest level on a scale of 1-4) and the public was warned to stay outside of the exclusion zone, defined as a 2-km radius around Laki-laki crater, 3 km to the NNE, and 5 km on the NE flanks.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Antara News, Antara News, Antara News
Report for Manam
The Darwin VAAC reported that continuous ash plumes from Manam were identified in satellite images at 0740, 1330, and 1530 on 17 June rising 2.1 km (7,000 ft) a.s.l. and drifting WNW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Report for Reykjanes
IMO reported that the eruption that began on 29 May near Sundhnúk, NE of Sýlingarfell within the Reykjanes volcanic system, continued through mid-June. The flow field was an estimated 9.2 square kilometers on 10 June, and the erupted volume was an estimated 41 million cubic meters. The eruption continued during 11-18 June, with lava from one active crater that traveled mostly N alongside Sýlingarfell, fed a lava lake, and then flowed onto the N part of the flow field causing it to thicken. Lava also accumulated S of the crater. Sulfur dioxide pollution from the eruption was notable during 12-13 June, especially near Blue Lagoon and Hafnir, and was expected to continue to impact areas downwind. As of 13 June, the lava flow at Grindavík road advanced very slowly and continued to thicken. Around noon on 17 June a small opening appeared on the W crater rim and fed a lava flow that traveled a short distance W. Drone data collected on 10 June indicated that this is the largest of the five eruptive episodes that have occurred in the area since December 2023, both in terms of area and volume.
Source: Icelandic Meteorological Office (IMO)
Report for Aira
JMA reported ongoing eruptive activity at Minamidake Crater (Aira Caldera’s Sakurajima volcano) during 10-17 June with nighttime crater incandescence. Very small eruptive events occurred during the week. Sulfur dioxide emissions were extremely high, averaging 3,300 tons per day on 12 June. The Alert Level remained at 3 (on a 5-level scale), and the public was warned to stay 1 km away from both craters.
Source: Japan Meteorological Agency (JMA)
Report for Dukono
PVMBG reported that the eruption at Dukono was ongoing during 12-17 June. Daily gray-and-white ash plumes that were sometimes dense rose 100-1,600 m above the summit and drifted E. The Alert Level remained at Level 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ebeko
KVERT reported that moderate explosive activity was ongoing at Ebeko during 6-13 June. According to volcanologists in Severo-Kurilsk (Paramushir Island, about 7 km E), explosions on 7 June generated ash plumes that rose as high as 1.5 km (5,000 ft) a.s.l. and drifted N. A thermal anomaly was identified in satellite images on 7 June; on other days either no activity was observed or weather conditions prevented views. The Aviation Color Code remained at Orange (the third level on a four-color scale). Dates are UTC; specific events are in local time where noted.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Report for Fuego
INSIVUMEH reported that eruptive activity continued at Fuego during 11-18 June. Daily explosions were recorded by the seismic network, averaging 3-9 per hour on most days, when counts were reported. The explosions generated gas-and-ash plumes that rose as high as 1.1 km above the crater rim and drifted as far as 30 km in multiple directions. Weather conditions often prevented visual observations during the second half of the week, though explosions and block avalanches were recorded by instruments and could often be heard. The explosions produced block avalanches that descended various drainages including the Ceniza (SSW), Seca (W), Taniluyá (SW), and Las Lajas (SE), and Honda (E), and often reached vegetated areas. Weak rumbling sounds and shock waves that rattles nearby houses and buildings were reported on most days. Ashfall was reported during 11-12 and 15-16 June in areas downwind including Acatenango (8 km E), La Soledad (11 km N), Parramos (18 km NNE), Patzicia (17 km NNW), and Yepocapa (8 km NW). Ashfall was forecast for areas downwind on some of the other days. The explosions also ejected incandescent material up to 100-400 m above the summit during 11-13 and 16-17 June. On 12 June lahars descended the Las Lajas and Ceniza drainages, carrying tree branches, trunks, and blocks as large as 1.5 m in diameter.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Great Sitkin
AVO reported that slow lava effusion in Great Sitkin’s summit crater continued during 12-18 June. Seismicity was low with few daily small earthquakes. Slightly elevated surface temperatures at the summit were identified in satellite images during 11-13 June. Weather clouds sometimes obscured or partially obscured satellite and webcam views. The Volcano Alert Level remained at Watch (the third level on a four-level scale) and the Aviation Color Code remained at Orange (the third color on a four-color scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Lewotolok
PVMBG reported that the eruption at Lewotolok continued during 12-18 June. On 12 June white-and-gray ash plumes rose 50-400 m and drifted N, NE, NW, and W. White steam-and-gas plumes rose as high as 600 m above the summit and drifted multiple directions on the other days. The Alert Level remained at 3 (on a scale of 1-4) and visitors and residents of Lamawolo, Lamatokan, and Jontona were warned to stay 2 km away from the vent and 3 km away from the vent on the S and SE flanks.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Marapi
PVMBG reported that eruptive activity at Marapi (on Sumatra) was ongoing during 12-18 June. White gas-and-steam plumes rose 200-300 m above the summit and drifted S, SW, W, and NE during 12-13 and 16 June. A dense gray ash plume rose 500 m above the summit and drifted NW on 17 June. Emissions were not visible on the other days; eruptive events were recorded during 12-13 and 15-17 June, though no emissions were observed. The Alert Level remained at 3 (on a scale of 1-4), and the public was warned to stay 4.5 km away from the active 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 7-13 June. Seismicity had decreased compared to the previous week. The SW lava dome produced 122 lava avalanches that traveled as far as 1.8 km down the upper part of the Bebeng drainage on the SW flank. Two pyroclastic flows descended the Bebeng, traveling as far as 1 km, at 2025 on 8 June and at 0406 on 9 June; the 8 June pyroclastic flow produced minor ashfall at the Merapi Observation Post in Kaliurang (8 km S). Morphological changes to the SW lava dome were due to continuing effusion and collapses of material. The volume of the SW dome was an estimated 2,265,200 cubic meters and the dome in the main crater was stable at an estimated 2,362,800 cubic meters based on a 13 June drone survey and webcam images. The highest temperature of the SW dome was around 245 degrees Celsius, two degrees higher than the 6 June measurement. 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 Sabancaya
Instituto Geofísico del Perú (IGP) reported that the eruption at Sabancaya continued at moderate levels during 10-16 June with a daily average of 42 explosions. Gas-and-ash plumes rose as high as 2.8 km above the summit and drifted less than 10 km E and SE. Thermal anomalies over the lava dome in the summit crater were identified in satellite data. Slight inflation was detected near the Hualca Hualca sector (4 km N). Sulfur dioxide emissions were at moderate levels, averaging 703 tons per day. The Alert Level remained at Orange (the third level on a four-color scale) and the public was warned to stay outside of a 12 km radius.
Source: Instituto Geofísico del Perú (IGP)
Report for Sangay
IG-EPN reported that high levels of eruptive activity continued at Sangay during 11-18 June. Gas-and-ash plumes were visible in webcam and/or satellite images on most days rising as high as 1.5 km above the summit and drifted WNW, W, WSW, and SW. During the morning of 12 June ashfall was reported in Cebadas (35 km WNW) and Reten Ichubamba (35 km WNW), Cantón Guamote (35 km WNW), province of Chimborazo, and in the cantons of Naranjito (121 km W), Guayaquil (175 km W), Samborondón (170 km W), and Daule (185 km W), in the province of Guayas. Incandescent material at the crater was visible during the dark hours of 11-13 June, and several episodes of incandescent material traveling as far as 2.5 km down the SE flank were visible during 11-14 June. Weather conditions sometimes hindered views especially on 15 and 17 June. On 16 June seismic signals indicated lahars and increased water flow in the Upano River. Secretaría de Gestión de Riesgos (SGR) maintained the Alert Level at Yellow (the second highest level on a four-color scale).
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN), Secretaría de Gestión de Riesgos (SGR)
Report for Santa Maria
INSIVUMEH reported that eruptive activity continued at Santa Maria’s Santiaguito lava-dome complex during 10-18 June with lava extrusion, block collapses, and avalanches at the Caliente dome. Sometimes the avalanches are audible several kilometers away. Incandescence from avalanches of material at the dome as well as explosions was visible during most nights and early mornings, and occasional incandescence was also present along the upper parts of the lava flow on the WSW flank. Lava extrusion fed the upper parts of the lava flow, and block avalanches occasionally traveled over the lava flow. Daily explosions (a few per hour on most days) generated gas-and-ash plumes that rose 700-900 m above the summit and drifted in multiple directions. The explosions produced block avalanches on the dome’s flanks and generated occasional short-range pyroclastic flows that descended multiple flanks. On 10 June a minor lahar descended the Cabello de Ángel river, a tributary of the Nimá I, on the E flank, possibly carrying tree trunks, branches, and volcanic blocks up to 1 m in diameter. Weather conditions sometimes prevented visual observations.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Semeru
PVMBG reported that eruptive activity continued at Semeru during 12-18 June. Daily white-and-gray ash plumes that were sometimes dense rose 200-900 m above the summit and drifted in multiple directions on all days except emissions were not observed on 18 June. Several daily eruptive events, as many as 23 on 13 June, were recorded by the seismic network, though plumes were not visually confirmed. A 15 June webcam image showed incandescent material descending the SE flank. The Alert Level remained at 3 (the third highest level 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, 500 m from the banks of the Kobokan drainage as far as 17 km from the summit, and to avoid other drainages 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 thermal anomalies over both the new and older lava domes at Sheveluch were identified in satellite images during 6-7 and 11-13 June; the domes were obscured by weather clouds during 8-10 June. The Aviation Color Code remained at Orange (the third 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 eruptive activity at Suwanosejima's Ontake Crater continued during 10-17 June and produced volcanic plumes that rose as high as 800 m above the crater rim. Crater incandescence was observed nightly in webcam images. No explosions were recorded. The Alert Level remained at 2 (on a 5-level scale) and the public was warned to stay at least 1.5 km away from the crater.
Source: Japan Meteorological Agency (JMA)
Report for Ubinas
Instituto Geofísico del Perú (IGP) reported that during 1-15 June seismicity at Ubinas was characterized by daily averages of 144 events associated with rock fracturing and 73 events associated with fluid movement. Gas, steam, and ash emissions were sometimes visible rising as high as 800 m above the crater rim and drifting mainly E and NE, though ash was not present in the emissions at least during 12-15 June. Sulfur dioxide emissions were minor, averaging 74 tons per day. A total of 23 thermal anomalies were identified in satellite images. Gas-and-steam emissions rose as high as 500 m above the crater rim during 16-17 June. The Alert Level remained at Yellow (the second level on a four-color scale) and the public was warned to stay 2 km away from the crater.
Source: Instituto Geofísico del Perú (IGP)