All times are local unless otherwise stated.

Nishinoshima (Japan) | 8 July-14 July 2020 | New Activity / Unrest Cite this Report
Nishinoshima Ogasawara Volcanic Arc	Based on satellite data and pilot observations (on 8 July), the Tokyo VAAC reported that during 8-14 July ash plumes from Nishinoshima rose to 3.7-6.1 km (12,000-20,000 ft) a.s.l. and drifted NW, N, NE, and E. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Turrialba (Costa Rica) | 8 July-14 July 2020 | New Activity / Unrest Cite this Report
Turrialba Central America Volcanic Arc	OVSICORI-UNA reported that passive emissions with minor amounts of ash were occasionally visible at Turrialba during 9-10 July. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

Aira (Japan) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported very small eruptive events at Minamidake Crater (at Aira Caldera’s Sakurajima volcano) during 6-10 July. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Dukono (Indonesia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on information from PVMBG and the Darwin VAAC ash plumes from Dukono rose to 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted NW and W during 8 and 11-14 July. The Alert Level remained at a 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone. Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Ebeko (Russia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 3-7 July that sent ash plumes up to 4.4 km (14,400 ft) a.s.l. Ash plumes drifted N and E, causing ashfall in Severo-Kurilsk on 3 and 6 July. A thermal anomaly over the volcano was identified in satellite images during 4 and 6-7 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Etna (Italy) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	INGV reported that during 6-12 July Strombolian activity at Etna’s New Southeast Crater ejected incandescent material that was deposited near the crater rim. Gas emissions rose from the vent in the pit crater at the bottom of Bocca Nuova. Sporadic explosive activity at Voragine Crater ejected lithics and produced ash emissions. Gas emissions rose from Northeast Crater and were audible from the crater’s edge. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Irazu (Costa Rica) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Irazu Central America Volcanic Arc	OVSICORI-UNA reported that at 2138 on 12 July the seismic network at Irazú recorded a significant landslide, possibly in the N part of the crater. The event could not be confirmed because of weather conditions. Another landslide event was recorded at 1538 on 13 July, which again could not be visually confirmed. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Kadovar (Papua New Guinea) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Kadovar Bismarck Volcanic Arc	Based on satellite and wind model data, the Darwin VAAC reported that on 10 July an ash plume from Kadovar rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that a bright thermal anomaly over Karymsky was identified in satellite images during 5-6 and 8 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Klyuchevskoy (Russia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that the temperature of the thermal anomaly at Klyuchevskoy sharply decreased on 3 July, possibly signaling the end of the current Strombolian phase. During 4-14 July the anomaly continued to decline and only weak fumarolic activity was visible. The Alert Level was lowered to Yellow (the second lowest level on a four-color scale) on 14 July. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Momotombo (Nicaragua) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Momotombo Central America Volcanic Arc	SINAPRED reported that a seismic swarm at Momotombo began at 0657 on 6 July and by the next day a total of 51 earthquakes had been recorded. The largest event was an M 2.6 located 9 km SE of the volcano, beneath Lake Managua, at a depth of 3 km. INETER noted that the earthquakes were located along a fault and not directly related to the volcano. Source: Sistema Nacional para la Prevención, Mitigación y Atención de Desastres (SINAPRED)
Pacaya (Guatemala) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 7-14 July Strombolian explosions at Pacaya’s Mackenney Crater ejected material as high as 100 m above the crater rim. Lava flows traveled as far as 1.2 km on the N and NE flanks. Lava flows also headed SW, W, and NW during 13-14 July. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Popocatepetl (Mexico) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Popocatepetl Trans-Mexican Volcanic Belt	CENAPRED reported that each day during 8-14 July there were 40-109 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. Minor crater incandescence was visible most nights. An explosion at 2320 on 8 July ejected incandescent material a short distance. An eruptive event at 0112 on 11 July ejected incandescent material within the crater and onto the crater rim. Incandescent material ejected within the crater was again visible at 0204 and 0454 on 12 July. The Alert Level remained at Yellow, Phase Two (middle level on a three-color scale). Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Reventador (Ecuador) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Reventador Andean Northern Volcanic Arc	IG reported that during 8-12 July seismic data from Reventador’s network indicated a high level of seismic activity, including explosions, harmonic tremor, and long-period earthquakes; there was no available seismic data during 13-14 July. Gas, steam, and ash emissions observed daily with the webcam or reported by the Washington VAAC rose as high as 1 km above the summit crater and drifted NW, W, and E. Cloudy weather sometimes prevented views of the volcano. Incandescent blocks rolled as far as 600 m down mainly the S and SE flanks during 8-9 and 12-14 July. Crater incandescence was visible almost nightly. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sabancaya (Peru) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Sabancaya Andean Central Volcanic Arc	Instituto Geofísico del Perú (IGP) reported a daily average of 17 explosions at Sabancaya during 6-12 July. Gas-and-ash plumes rose as high as 2.5 km above the summit and drifted SE, E, and NE. There were six thermal anomalies over the crater identified in satellite data. The Alert Level remained at Orange (the second highest level on a four-color scale) and the public were warned to stay outside of a 12-km radius. Source: Instituto Geofísico del Perú (IGP)
Semeru (Indonesia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Semeru Sunda Volcanic Arc	PVMBG reported that dense white-gray ash plumes from Semeru were occasionally visible during 6-12 July rising no higher than 400 m above the summit. Ash plumes drifted SW on 11 July. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Sheveluch (Russia) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 3-10 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Stromboli (Italy) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Stromboli Aeolian Volcanic Arc	INGV reported that during 6-12 July activity at Stromboli was characterized by ongoing explosive activity mainly from three vents in Area N (north crater area) and three vents in Area C-S (south-central crater area). Moderate explosions from both areas ejected lapilli, bombs, and ash with decreasing frequency and intensity through the week. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Suwanosejima (Japan) | 8 July-14 July 2020 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	JMA reported that nighttime incandescence at Suwanosejima’s Ontake Crater was occasionally visible during 3-10 July. An eruptive event on 5 July generated a grayish white plume that rose 800 m above the crater rim and ejected material 300 m from the crater. The Tokyo VAAC noted that an ash plume rose to 2.1 km (7,000 ft) a.s.l. and drifted NE on 12 July based on satellite images and JMA information. The Alert Level remained at 2 (on a 5-level scale). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,322 individual reports over 1,229 weeks (average of 17 per week) on 336 different volcanoes.

Use the dropdowns to choose the year and week for archived Weekly Reports.

 News Feeds and Google Placemarks

 Criteria & Disclaimers

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.

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.

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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)