All times are local unless otherwise stated.

Aira | 6 May-12 May 2020 | Continuing ActivityCite this Report
Aira Kyushu (Japan)	JMA reported that during 4-11 May incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. There were four eruptive events with plumes rising as high as 2.3 km above the crater rim. Three explosions were recorded; an explosion at 0531 on 9 May produced an ash plume that rose 4.2 km and ejected material 600-900 m away from the crater. JMA noted that ash plumes had not risen higher than 4 km since 8 November 2019. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Asosan | 6 May-12 May 2020 | Continuing ActivityCite this Report
Asosan Kyushu (Japan)	JMA reported that eruptive activity at Asosan was recorded during 4-11 May. Volcanic plumes rose 700-900 m above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was high at 3,000-4,800 tons per day during 7-8 May. The Alert Level remained at 2 (on a scale of 1-5). Source: Japan Meteorological Agency (JMA)
Cleveland | 6 May-12 May 2020 | Continuing ActivityCite this Report
Cleveland Chuginadak Island (USA)	AVO lowered both the Volcano Alert Level and the Aviation Color Code for Cleveland to Unassigned on 7 May, noting that explosive activity on 9 January 2019 (and subsequent lava extrusion in the summit crater) was followed by an overall decrease in detected surface temperature and no further surface changes. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Dukono | 6 May-12 May 2020 | Continuing ActivityCite this Report
Dukono Halmahera	Based on satellite and wind model data, the Darwin VAAC reported that during 6-12 May ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted NE, E, and SE. The Alert Level remained at 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 | 6 May-12 May 2020 | Continuing ActivityCite this Report
Ebeko Paramushir Island (Russia)	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 1-8 May that sent ash plumes up to 2.6 km (8,500 ft) a.s.l. Ash plumes drifted E, causing ashfall in Severo-Kurilsk during 3-5 May. A thermal anomaly was identified in satellite data on 3 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Etna | 6 May-12 May 2020 | Continuing ActivityCite this Report
Etna Sicily (Italy)	INGV reported that on 5 May increasing and pulsating ash emissions at Etna’s New Southeast Crater (NSEC) formed a plume that drifted SSE. The activity may have concurrently occurred with the enlargement of vent number 3. Explosive activity at Voragine Crater (VOR), with minor ash emissions and occasional visible shreds of incandescent material, was relatively mild and discontinuous. During a field inspection on 8 May, volcanologists observed that the main cone was almost unchanged and produced modest ash emissions. Strong explosive activity at a cone located E of the main cone produced a lot of ash, and ejected coarse material that fell on the W edge of VOR as well as on the S terrace of Bocca Nuova Crater. Activity at NSEC again increased; on 10 May Strombolian explosions ejected material out of the crater and onto the flanks. Concurrently, increased activity in VOR was characterized by the ejection of ballistics beyond its crater rim. After a few hours Strombolian activity in NSEC significantly decreased and explosive activity in VOR was both less intense and less frequent. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Ibu | 6 May-12 May 2020 | Continuing ActivityCite this Report
Ibu Halmahera	The Darwin VAAC reported that on 9 May an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SE based on satellite images and weather models. On 12 May an ash plume rose to 2.1 km a.s.l. and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side. Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Klyuchevskoy | 6 May-12 May 2020 | Continuing ActivityCite this Report
Klyuchevskoy Central Kamchatka (Russia)	KVERT reported that Strombolian activity at Klyuchevskoy was visible during 1-8 May along with a bright thermal anomaly identified in satellite images. A lava flow continued to advance down the Apakhonchich drainage on the SE flank. An ash plume drifted 22 km SE on 2 May. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Popocatepetl | 6 May-12 May 2020 | Continuing ActivityCite this Report
Popocatepetl Mexico	CENAPRED reported that each day during 5-12 May there were 94-157 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. Minor explosions were recorded at 1534 and 1609 on 7 May, at 1648 on 10 May, at 1723 and 2351 on 11 May, and at 0302 and 0604 on 12 May. Crater incandescence was visible some nights. The Alert Level remained at Yellow, Phase Two (middle level on a three-color scale). Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
Rincon de la Vieja | 6 May-12 May 2020 | Continuing ActivityCite this Report
Rincon de la Vieja Costa Rica	OVSICORI-UNA reported periodic phreatic explosions at Rincón de la Vieja during 6-12 May. Phreatic explosions were recorded at 1624 on 6 May and 0343 on 8 May, though inclement weather conditions hindered visual confirmation. Two small emissions were noted at 1850 on 8 May and at 0020 on 9 May. An event at 1925 on 9 May generated a gas-and-steam plume that rose almost 2 km above the crater rim. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Sangay | 6 May-12 May 2020 | Continuing ActivityCite this Report
Sangay Ecuador	IG reported a high level of activity at Sangay during 6-12 May. Weather clouds often prevented visual observations of the volcano; according to Washington VAAC notices ash plumes rose 870-1,470 m above the summit and drifted W and SW during 6 and 10-12 May. Incandescent blocks were seen descending the SE flank during breaks in cloud cover on 6, 8, and 11 May. Signals indicating lahars were recorded by the seismic network on 7 and 9 May. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sangeang Api | 6 May-12 May 2020 | Continuing ActivityCite this Report
Sangeang Api N of Sumbawa Island	The Darwin VAAC reported that on 10 May a discrete ash emission from Sangeang Api rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted E. The Alert Level remained at 2 (on a scale of 1-4). Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Semeru | 6 May-12 May 2020 | Continuing ActivityCite this Report
Semeru Eastern Java	PVMBG reported that the eruption at Semeru continued during 4-10 May. Eruptive events produced dense white-gray ash plumes that rose 200-500 m above the summit. Incandescent material from the ends of lava flows descended 500-1,000 m in the Kembar and Kobokan drainages (on the S flank), reaching a maximum distance of 2 km from the crater. 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 | 6 May-12 May 2020 | Continuing ActivityCite this Report
Sheveluch Central Kamchatka (Russia)	KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 1-8 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Suwanosejima | 6 May-12 May 2020 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Islands (Japan)	JMA reported that during 1-8 May explosions occurred twice a day at Suwanosejima’s Ontake Crater and produced plumes that rose as high as 1 km above the crater rim. Material was ejected 400 m from the crater. Crater incandescence was visible nightly. Rumbling sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 19,996 individual reports over 1,215 weeks (average of 16 per week) on 332 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.

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)