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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 25 June-1 July 2025
Name Country Volcanic Region Eruption Start Date Report Status
Kirishimayama Japan Ryukyu Volcanic Arc — New
Lewotobi Indonesia Sunda Volcanic Arc 2023 Dec 23 New
Ambae Vanuatu Vanuatu Volcanic Arc — Continuing
Ambrym Vanuatu Vanuatu Volcanic Arc — Continuing
Dukono Indonesia Halmahera Volcanic Arc 1933 Aug 13 Continuing
Fuego Guatemala Central America Volcanic Arc 2002 Jan 4 Continuing
Gaua Vanuatu Vanuatu Volcanic Arc — Continuing
Great Sitkin United States Aleutian Ridge Volcanic Arc 2021 May 25 Continuing
Ibu Indonesia Halmahera Volcanic Arc 2008 Apr 5 Continuing
Iliamna United States Alaska Peninsula Volcanic Arc — Continuing
Kilauea United States Hawaiian-Emperor Hotspot Volcano Group 2024 Dec 23 Continuing
Lewotolok Indonesia Sunda Volcanic Arc 2025 Jan 16 Continuing
Lopevi Vanuatu Vanuatu Volcanic Arc — Continuing
Poas Costa Rica Central America Volcanic Arc 2025 Jan 5 Continuing
Raung Indonesia Sunda Volcanic Arc — Continuing
Rincon de la Vieja Costa Rica Central America Volcanic Arc — 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
Stromboli Italy Aeolian Volcanic Arc 1934 Feb 2 Continuing
Suwanosejima Japan Ryukyu Volcanic Arc 2004 Oct 23 Continuing
Yasur Vanuatu Vanuatu Volcanic Arc 1270 ± 110 years Continuing
All times are local unless otherwise stated.
Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 21,469 individual reports over 1,278 weeks (average of 17 per week) on 339 different volcanoes.

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Adams Cotopaxi Ijen Lewotobi Peuet Sague St. Helens
Agung Cuicocha Iliamna Lewotolok Pinatubo Stromboli
Ahyi Cumbal Iliwerung Little Sitkin Planchon-Peteroa Sulu Range
Aira Dabbahu Inielika Llaima Poas Sumbing
Akan Davidof Ioto Lokon-Empung Popocatepetl Sumisujima
Alaid Dempo Irazu Lonquimay Purace Sundoro
Alu-Dalafilla Descabezado Grande Iwatesan Lopevi Puyehue-Cordon Caulle Suoh
Ambae Dieng Volcanic Complex Iya Machin Rabaul Suretamatai
Ambang Dukono Izu-Torishima Makushin Raikoke Suwanosejima
Ambrym East Epi Jackson Segment Maly Semyachik Ranakah Taal
Anatahan Ebeko Kaba Manam Raoul Island Tair, Jebel at
Aniakchak Ebulobo Kadovar Manda Hararo Rasshua Takawangha
Antillanca Volcanic Complex Edgecumbe Kaitoku Seamount Marapi Raung Talang
Antuco Egon Kama'ehuakanaloa Maroa Redoubt Tambora
Apoyeque Ekarma Kambalny Martin Reventador Tanaga
Arenal Eldey Kanaga Masaya Reykjanes Tandikat-Singgalang
Asamayama Erebus Kanlaon Matthew Island Rincon de la Vieja Tangkoko-Duasudara
Askja Erta Ale Karangetang Maule, Laguna del Rinjani Tangkuban Parahu
Asosan Etna Karkar Mauna Loa Ritter Island Tara, Batu
Atka Volcanic Complex Etorofu-Yakeyama [Grozny Group] Karthala Mayon Rotorua Ta'u
Augustine Eyjafjallajokull Karymsky McDonald Islands Ruang Taupo
Avachinsky Fagradalsfjall Kasatochi Melebingoy Ruapehu Telica
Awu Fentale Katla Melimoyu Ruby Tenerife
Axial Seamount Fernandina Katmai Merapi Ruiz, Nevado del Tengger Caldera
Azul, Cerro Fogo Kavachi Midagahara Sabancaya Three Sisters
Azumayama Fonualei Kelimutu Misti, El Sakar Tinakula
Bagana Fournaise, Piton de la Kelud Miyakejima Salak Tofua
Balbi Fourpeaked Kerinci Momotombo San Cristobal Tokachidake
Bamus Fuego Ketoi Monowai San Miguel Tolbachik
Banda Api Fujisan Kharimkotan Montagu Island San Vicente Toliman
Bardarbunga Fukutoku-Oka-no-Ba Kick 'em Jenny Moyorodake [Medvezhia] Sangay Tongariro
Barren Island Galeras Kie Besi Mutnovsky Sangeang Api Trident
Batur Galunggung Kikai Myojinsho Santa Ana Tungurahua
Bezymianny Gamalama Kilauea Nabro Santa Maria Turrialba
Bogoslof Gamkonora Kirishimayama Negra, Sierra Sao Jorge Ubinas
Brava Gareloi Kita-Ioto Negro, Cerro Sarigan Ugashik-Peulik
Bristol Island Gaua Kizimen Nightingale Island Sarychev Peak Ukinrek Maars
Bulusan Gede Klyuchevskoy Nishinoshima Saunders Ulawun
Calbuco Gorely Kolokol Group Nisyros Savo Unnamed
Callaqui Great Sitkin Kolumbo Northern EPR at 9.8°N Semeru Unnamed
Cameroon Grimsvotn Koryaksky Novarupta Semisopochnoi Veniaminof
Campi Flegrei Guagua Pichincha Krakatau NW Rota-1 Seulawah Agam Villarrica
Campi Flegrei del Mar di Sicilia Guallatiri Krummel-Garbuna-Welcker Nyamulagira Sheveluch Vulcano
Cayambe Guntur Krysuvik-Trolladyngja Nyiragongo Shishaldin West Mata
Chachadake [Tiatia] Hachijojima Kuchinoerabujima Ofu-Olosega Simbo Westdahl
Chaiten Hakoneyama Kurikomayama Okataina Sinabung Whakaari/White Island
Chiginagak Heard Kusatsu-Shiranesan Okmok Sinarka Witori
Chikurachki Hekla Kverkfjoll Ontakesan Siple Wolf
Chiles-Cerro Negro Helgrindur La Palma Oraefajokull Sirung Wrangell
Chillan, Nevados de Hierro Lamington Osorno Slamet Yakedake
Chirinkotan Hokkaido-Komagatake Lamongan Pacaya Snaefellsjokull Yasur
Chirpoi Home Reef Langila Pagan Soputan Yellowstone
Ciremai Hood Lanin Palena Volcanic Group Sorikmarapi Yufu-Tsurumi
Cleveland Huaynaputina Lascar Paluweh Sotara Zaozan [Zaosan]
Colima Hudson, Cerro Late Panarea Soufriere Hills Zavodovski
Colo Huila, Nevado del Lateiki Papandayan Soufriere St. Vincent Zhupanovsky
Concepcion Hunga Tonga-Hunga Ha'apai Lengai, Ol Doinyo Pavlof South Sarigan Seamount Zubair Group
Copahue Ibu Lereboleng Pelee Spurr
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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)

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Report for Kirishimayama
The Japan Meteorological Agency (JMA) reported that eruptive activity continued at Shinmoedake (Shinmoe peak, a stratovolcano of the Kirishimayama volcano group) at least through 30 June. After the eruption on 22 June no further eruptive events were detected in monitoring data during 23-24 June, and weather clouds often obscured views. On 24 June white plumes rose more than 400 m above the crater rim and at most 100 m above a fissure on the W flank based on webcam images. Tilt data from a station 3 km SE indicated inflation on the NW flank during 23-25 June, though minor inflation had been detected since March. The number of volcanic earthquakes with epicenters directly beneath Shinmoedake had been fluctuating since late October 2024, though the rates were very high with more than 600 events recorded during 23-24 June, more than 400 events during 24-25 June, and more than 300 events during 25-26 June. Volcanic tremor was also periodically detected. On 25 June sulfur dioxide emissions were high, averaging 2,100 tons per day.

Weather clouds obscured views during the morning of 26 June, though at around 0758 a small amount of ashfall was reported at Takaharu Town (12 km E) in Miyazaki Prefecture. At 1250 white plumes were visible rising 1 km above the crater rim and drifting E, and by 1507 they were drifting SE. Grayish white plumes continuously rose as high as 1.6 km above the crater rim, drifting S and SE, from 1025 on 27 June until at least 1500 on 1 July. Minor ashfall was reported at the Miyazaki Local Meteorological Observatory (Miyazaki City, 50 km E) during 26-27 June, and a relatively large amount of ash fell in both Kobayashi City (13 km NE) and Kirishima City (21 km SW) during 0900-2300 on 28 June. During a 28 June field survey, observers noted that the plumes were rising from a row of N-S-trending craters located on the NE part of the crater floor. Ash deposits were visible on the N flank and the temperature of those deposits was higher than surrounding areas. A geothermal area near a fissure on the W flank was enlarged compared to 7 May observations. The Alert Level remained at 3 (on a 5-level scale) and the public was warned to exercise caution within 3 km from Shinmoedake Crater.
Source: Japan Meteorological Agency (JMA)
Report for Lewotobi
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that unrest continued at Lewotobi Laki-laki during 25 June-1 July. Daily white plumes rose as high as 500 m above the summit and drifted in multiple directions. The Alert Level remained at 4 (on a scale of 1-4) and on 25 June the exclusion zone was reduced to 6 km from the center of Laki-laki and 7 km in a semicircle clockwise from the SW to the NE.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Ambae
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported ongoing unrest at Ambae during the month. Steam and/or gas emissions from the active vents were visible in webcam images and photos taken during field visits during 10-12 and 19 June. Sulfur dioxide emissions were ongoing and detected in satellite data during 3-17, 19-21, and 23-26 June. Seismic data also confirmed ongoing unrest. The Alert Level remained at 2 (on a scale of 0-5), and the public was warned to stay outside of the Danger Zone, defined as a 2-km radius around the active vents in Lake Voui, and away from drainages during heavy rains.
Source: Vanuatu Meteorology and Geohazards Department (VMGD)
Report for Ambrym
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported ongoing unrest at Ambrym during the month. Webcam images recorded steam emissions rising from both Benbow and Marum craters during 7, 10-11, and 24 June, and a weak thermal anomaly on 17 June. Seismic data confirmed ongoing unrest. The Alert Level remained at 2 (on a scale of 0-5). VMGD warned the public to stay outside of Permanent Danger Zone A, defined as a 1-km radius around Benbow Crater and a 2-km radius around Marum Crater, and to stay 500 m away from the ground cracks created by the December 2018 eruption.
Source: Vanuatu Meteorology and Geohazards Department (VMGD)
Report for Dukono
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Dukono continued during 25 June-1 July. Daily white-and-gray or white, gray, and black gas-and-ash plumes rose 400-1,200 m above the summit and drifted NE and E. Booming, rumbling, and/or banging was heard by residents and at the observation post, 10-11 km N, during 25 and 28-30 June and on 1 July. The Alert Level remained at Level 2 (on a scale of 1-4) and the public was warned to stay 4 km away from the Malupang Warirang Crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Fuego
The Instituto Nacional de Sismología, Vulcanologia, Meteorologia e Hidrología (INSIVUMEH) reported that explosions were last detected at Fuego on 22 June. Incandescence at the summit was observed in webcam images during 24 June-1 July. Fumarolic plumes occasionally rose from the summit.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Gaua
On 27 June the Vanuatu Meteorology and Geohazards (VMGD) reported that unrest continued at Gaua during the month. Steam and/or gas emissions from the vent were visible in satellite images during 9-10 and 17 June and sulfur dioxide emissions were identified during 10-11 June. The Alert Level remained at 2 (on a scale of 0-5) and the public was warned to stay away from the main cone.
Source: Vanuatu Meteorology and Geohazards Department (VMGD)
Report for Great Sitkin
The Alaska Volcano Observatory (AVO) reported that slow lava effusion continued to feed a thick flow in Great Sitkin’s summit crater during 25 June-1 July. Small daily earthquakes were detected by the seismic network, including signals probably caused by small rockfalls from the steep S and SE flanks. Slightly elevated surface temperatures consistent with lava effusion were occasionally observed in clear satellite views. Observers on a nearby ship saw a diffuse steam plume rising above the dome during 27-38 June. 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 Ibu
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that the eruption at Ibu continued during 25 June-1 July. Daily dense gray ash plumes rose 200-600 m above the summit and drifted NE, E, and SE. Nighttime crater incandescence was visible in some webcam images. The Alert Level remained at 3 (the second highest level on a four-level scale) and the public was advised to stay 4 km away from the active crater and 5 km away from the N crater wall opening.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Iliamna
The Alaska Volcano Observatory (AVO) reported that repairs to Iliamna’s seismic network were completed during the previous week, allowing for sufficient data to be available to monitor activity. At 1141 on 1 July the Aviation Color Code was changed from Unassigned to Green (the lowest level on a four-color scale) and the Volcano Alert Level was changed from Unassigned to Normal (the lowest level on a four-level scale).
Source: US Geological Survey Alaska Volcano Observatory (AVO)
Report for Kilauea
The Hawaiian Volcano Observatory (HVO) reported that the eruption within Kilauea’s Kaluapele summit caldera, characterized by episodic fountaining and intermittent spatter at two vents along the SW margin of Halema’uma’u Crater, continued at variable levels during 25 June-1 July. Nighttime incandescence at both the N and S vents was visible overnight during 24-28 June and intermittent lava spattering at the N vent was visible during 26-29 June. Small, sporadic dome fountains and intermittent lava overflows at the N vent began at 0727 on 29 June. Small, sustained lava fountaining began at 0803 and the fountains slowly grew over the next hour; at 0905 the height and vigor of the fountains increased notably. The fountains were as high as 150 m by 0931 and multiple lava flows were advancing on the crater floor. An eruption plume rose at least 6 km (20,000 ft) above the ground; variable winds blew gas and tephra plumes in different directions. The fountains rose higher, reaching 340 m for several hours. The activity started to wane and ceased at 1954, after 11 hours of continuous fountaining. Flames were visible at the S vent for a few minutes afterwards. The N vent produced an estimated 6.2 million cubic meters of lava covering about 80 percent of the crater floor. 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 Hawaiian Volcano Observatory (HVO)
Report for Lewotolok
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that an eruption at Lewotolok was ongoing during 25 June-1 July. Daily gray, white-to-gray, or gray-to-black ash plumes rose 400-1,200 m above the summit of the cone and drifted in multiple directions. Clear nighttime webcam images showed incandescent material both at the summit cone and being ejected above the cone. Lava flows on the flanks of the main volcano edifice were also incandescent. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 2 km away from the vent and 2.5 km away on the S, SE, and W flanks.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Lopevi
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported that seismic data confirmed continuing unrest at Lopevi throughout June. Small fumarolic steam plumes were continuously emitted from the summit crater during 6 and 10-11 June based on a webcam images. Low-level thermal anomalies were identified in satellite images on 2 June, indicative of increased surface temperatures, and sulfur dioxide emissions were detected on 10 June. The Alert Level remained at 2 (on a scale of 0-4).
Source: Vanuatu Meteorology and Geohazards Department (VMGD)
Report for Poas
The Observatorio Vulcanológico y Sismológico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported continuing gas-and-steam emissions with occasional minor amounts of ash at Poás during 24 June-1 July. Uplift ceased to be detected in the past few weeks and no significant deformation was detected during the current week. Incandescence was periodically visible and detected in infrared webcam views at Boca A vent. The hyperacid lake over Boca C continued to rise, notably during periods of heavy rain. Dense gas-and-steam emissions continued to be emitted from Boca A; gas component ratios were at normal levels. The emissions contained minor ash content at around 1530 on 25 June and rose 500 m above the crater rim. The Alert Level remained at 2 (the second lowest level on a four-level scale) and the Aviation Color Code remained at Yellow (the second lowest color on a four-color scale).
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Report for Raung
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that eruptive activity at Raung continued during 25 June-1 July. No emissions were visible during 25-28 June, likely due to weather conditions. Daily ash plumes during 29 June-1 July rose as high has as 600 m above the crater rim and drifted NW and W. Incandescence at the summit was sometimes visible in webcam images. The Alert Level remained at 2 (on a scale of 1-4) and the public was warned to stay 3 km away from the summit crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Report for Rincon de la Vieja
The Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA) reported that at 1720 on 26 June a small phreatic eruption at Rincón de la Vieja produced a gas plume that rose 100 m above the crater rim and drifted NW.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Report for Santa Maria
The Instituto Nacional de Sismología, Vulcanología, Meteorología e Hidrología (INSIVUMEH) reported high levels of ongoing eruptive activity at Santa Maria’s Santiaguito dome complex during 24 June-1 July with continuing lava extrusion at Caliente dome. Daily explosions, 1-2 per hour when reported, generated gas-and-ash plumes that rose as high as 1.2 km above the dome and drifted as far as 30 km N, NW, W, and SW. Effusion of blocky lava and collapses of material produced block avalanches that descended multiple flanks; the collapsed material sometimes produced short pyroclastic flows that reached the base of Caliente cone. Incandescence was visible at Caliente dome and upper part of the W flank lava flow. Minor ashfall was reported in communities surrounding the volcano during 25-26 June and in San Marcos (10 km SW), Loma Linda (7 km W), Palajunoj (17 km SSW), and other areas downwind during 29-30 June.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Report for Semeru
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) reported that activity continued at Semeru during 25 June-1 July, often with multiple daily eruptive events recorded by the seismic network. Emissions were not visually observed most of the week. At 0025 and 0030 on 1 July white-and-gray ash plumes rose 500-600 m above the summit and drifted SW. The Alert Level remained at 2 (the second lowest level on a scale of 1-4). The public was warned to stay at least 3 km away from the summit in all directions, 8 km from the summit to the SE, 500 m from the banks of the Kobokan drainage as far as 13 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
The Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) reported that eruptive activity at Sheveluch continued during 20-26 June. Weather clouds mostly obscured views through the week, though a few ash plumes were visible in webcam or satellite views on 23 and 25 June rising as high as 4.5 km a.s.l. and drifting E and SE.
Source: Institute of Volcanology and Seismology (IVS) of the Far Eastern Branch of the Russian Academy of Sciences (FEB RAS)
Report for Stromboli
The Sezione di Catania - Osservatorio Etneo (INGV) reported that eruptive activity continued at Stromboli during 23-29 June. Webcam images showed Strombolian activity at four vents in Area N within the upper part of the Sciara del Fuoco and from at least two vents in Area C-S (South-Central Crater) on the crater terrace. The vents in Area N continued to produce low- to medium-intensity explosions at a rate of 7-11 events per hour, ejecting lapilli and bombs less than 150 m above the vents. Low-intensity explosions at the vents in Area C-S ejected ash above the vent at a rate of 0-1 events per hour. The Alert Level remained at Yellow (the second lowest level on a four-level scale) according to the Dipartimento della Protezione Civile.
Sources: Sezione di Catania - Osservatorio Etneo (INGV), Dipartimento della Protezione Civile
Report for Suwanosejima
The Japan Meteorological Agency (JMA) reported that eruptive activity at Suwanosejima's Ontake Crater continued during 23-30 June. Incandescence was observed nightly in webcam images. Explosions at 1041 on 23 June, at 1939 on 27 June, and at 0806 on 30 June produced ash plumes that rose 2.3, 0.6, and 1.7 km above the crater rim and drifted NE, E, and straight up, respectively. Eruptive events during 27 and 29-30 June produced ash plumes that rose as high as 2.1 km above the crater rim and mainly rose straight up or drifted W. The Alert Level remained at 2 (the second level on a five-level scale) and the public was warned to be cautious within 1.5 km of the crater.
Source: Japan Meteorological Agency (JMA)
Report for Yasur
On 27 June the Vanuatu Meteorology and Geohazards Department (VMGD) reported that activity at Yasur had continued during the month at a level of “major unrest,” as defined by the Alert Level 2 status (on a scale of 0-5). Field photos and webcam images indicated that explosions continued, producing emissions of gas, steam, and/or ash. Sulfur dioxide gas emissions were identified in satellite images during 4-12, 15-16, 20-22, and 26 June, and low-level thermal anomalies were identified during 5, 19-20, and 24 June. Seismic data confirmed continuing volcanic activity with explosions that were occasionally strong. The report warned that ejected material from explosions could fall in and around the crater. The public was reminded to not enter the restricted area within 600 m around the boundaries of the Permanent Exclusion Zone, defined by Danger Zone A on the hazard map.
Source: Vanuatu Meteorology and Geohazards Department (VMGD)