All times are local unless otherwise stated.

Makushin (United States) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Makushin Aleutian Ridge Volcanic Arc	AVO reported that small earthquakes in an area about 10 km E of the Makushin’s summit and at a depth of about 8 km continued to be detected during 15-21 July. Since the onset of seismicity on 15 June, the earthquakes had generally decreased in both size and rate. No surficial activity was visible in satellite or webcam images; only typical minor steaming from the summit crater lake. Weakly elevated surface temperatures were identified in satellite data during 20-21 July. The Aviation Color Code and Volcano Alert Level remained at Yellow and Advisory, respectively. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Nishinoshima (Japan) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Nishinoshima Ogasawara Volcanic Arc	JMA scientists observed Nishinoshima from a ship on 11 July. They reported that a large amount of ash was emitted from the summit crater; plumes rose about 1.7 km and drifted W, dropping ash into the sea. Deposits of large blocks at the foot of the cone were visible. Lava fountains that rose 200 m above the crater were observable at night, along with lightning in the ash plumes. The cone had grown to about 200 m, about 40 m higher than an estimate on 1 December 2019. The report stated that ships should stay at least 2.5 km away from the cone. Based on satellite data and pilot observations, the Tokyo VAAC reported that during 16-21 July ash plumes rose to 3.7-6.4 km (12,000-21,000 ft) a.s.l. and drifted N, NE, and E. Satellite data showed a sulfur dioxide plume reaching the western USA on 18 July, after traveling over 9,000 km from Nishinoshima. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC), Simon Carn
Pacaya (Guatemala) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 15-21 July Strombolian explosions at Pacaya’s Mackenney Crater ejected material as high as 100 m above the crater rim. Lava-flow effusion ceased during 14-19 July, though flows may have continued to advance or be active on the SW, NW, N, and NE flanks. On 20 July lava emerged from a fissure or vents at the NW base of the cone, near Cerro Chino, and traveled SE. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Raung (Indonesia) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Raung Sunda Volcanic Arc	PVMBG reported that during 1 January-15 July white plumes at Raung rose as high as 50 m above the summit. Seismicity increased on 13 July and then again on 16 July. At 1052 on 16 July observers noted that the color of the emissions had become brownish white and rose higher. A VONA stated that at 1353 an ash plume rose 100 m above the summit and drifted N. At 1356 the color of the emissions changed to white and gray, and plumes rose to 100 m above the summit. During the rest of the day gray and reddish-colored plumes rose 50-200 m. There were 60 emissions recorded in total. During 0000-0600 on 17 July there were a total of 26 emissions characterized by brownish ash plumes rising 50-200 m. PVMBG raised the Alert Level to 2 (on a scale of 1-4), and the public was reminded not to approach the crater within a 2-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Telica (Nicaragua) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Telica Central America Volcanic Arc	SINAPRED stated that at 1659 on 20 July small explosions at Telica produced a gas-and-ash plume that rose 200 m above the crater rim as reported by INETER. RSAM values increased from 57 to 153 units at the time of the explosions, and remained elevated at 144 units afterwards. SINAPRED recommended that the public stay at least 1.5 km away from the crater. Source: Sistema Nacional para la Prevención, Mitigación y Atención de Desastres (SINAPRED)
Turrialba (Costa Rica) | 15 July-21 July 2020 | New Activity / Unrest Cite this Report
Turrialba Central America Volcanic Arc	OVSICORI-UNA reported that ash emissions of variable densities were visible at Turrialba almost daily during 16-20 July. Ash plumes rose as high as 200 m above the crater rim each day during 16-18 July. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

Agung (Indonesia) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Agung Sunda Volcanic Arc	PVMBG reported that the last eruption at Agung was recorded at 0138 on 13 June 2019. Over the past year seismicity had generally decreased; volcanic earthquakes continued to be recorded but at a low occurrence rate. Deformation data indicated a deflationary pattern which had stabilized in recent months. A thermal anomaly was last visible in satellite data in October 2019 and did not reappear. White plumes were visible rising 20-150 m above the summit during 1 January-16 July. PVMBG lowered the Alert Level at Agung to 2 (on a scale of 1-4) on 16 July, stating that the public should not enter an exclusion zone set at a 2-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Copahue (Chile-Argentina) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Copahue Andean Southern Volcanic Arc	SERNAGEOMIN reported that an ash plume from Copahue was visible on 16 July. The Alert Level remained at Green (the lowest level on a four-color scale) and the public was reminded to stay 500 m away from El Agrio crater. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Dukono (Indonesia) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on information from PVMBG and satellite data the Darwin VAAC reported that ash plumes from Dukono rose to 2.1-2.3 km (7,000-8,000 ft) a.s.l. and drifted NW and W during 15-21 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: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Ebeko (Russia) | 15 July-21 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 15-16 July that sent ash plumes up to 3.6 km (11,800 ft) a.s.l. Ash plumes drifted SE, causing ashfall in Severo-Kurilsk on 15 July. A thermal anomaly over the volcano was identified in satellite images on those same days. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Ibu (Indonesia) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Ibu Halmahera Volcanic Arc	PVMBG reported that during 15-20 July white and gray plumes with variable densities rose 200-800 m above Ibu’s summit and drifted in multiple directions; weather conditions prevented visual observations on 17 July. 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: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)
Kadovar (Papua New Guinea) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Kadovar Bismarck Volcanic Arc	RVO reported minor eruptive activity at Kadovar during 1-15 July consisting of occasional light gray ash plumes of variable densities rising a few hundred meters above the summit crater. Fluctuating summit incandescence was visible at night. Activity intensified on 5 July as emissions became dark gray and dense. Explosions at 1652 and 1815 generated dense dark gray ash plumes that rose 1 km and drifted W. Loud rumbling accompanied the explosion. Activity subsided later that day but was again more intense during 8-10 July. Explosions recorded at 2045 on 8 July, 1145 and 1400 on 9 July, and at 0950 and 1125 on 10 July produced ash plumes that rose 1 km above the summit. Source: Rabaul Volcano Observatory (RVO)
Karymsky (Russia) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 13 and 15 July. A gas-and-steam plume containing some ash drifted 26 km SW on 14 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Semeru (Indonesia) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Semeru Sunda Volcanic Arc	PVMBG reported that ash plumes from Semeru rose 500 m above the summit and drifted N during 16-17 July. Weather conditions prevented visual observations during 15 and 18-21 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) | 15 July-21 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 10-17 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) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Stromboli Aeolian Volcanic Arc	INGV reported that during 13-19 July activity at Stromboli was characterized by ongoing explosive activity from two vents in Area N (north crater area) and four vents in Area C-S (south-central crater area). Explosions at the N1 vent in Area N sometimes ejected tephra 200 m high, and ejected lapilli and bombs radially. Low-intensity explosions at vent N2 ejected tephra 80 m high. Explosions at the S1 and S2 vents in Area C-S ejected tephra. A vent between S2 and C (Area C-S) was noted on 18 July and produced occasional explosions. A sequence of high-energy explosions began at 0500 on 19 July and ended at 0504. The first explosion originated at the central vent in Area C-S but within a few seconds involved all Area C-S vents. An ash plume rose as high as 1 km. Tephra was ejected radially; some material was deposited along the Sciara del Fuoco and reached the coast within about 40 seconds after the beginning of the event. Tephra fell in the towns of Liscione and Roccette. The event damaged the infrared camera at Pizzo (400 m elevation). Source: Sezione di Catania - Osservatorio Etneo (INGV)
Suwanosejima (Japan) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	JMA reported that nighttime incandescence at Suwanosejima’s Ontake Crater was occasionally visible during 10-17 July. Occasional eruptive events were recorded along with three explosions. One of them, recorded at 1630 on 12 July, generated a gray-white plume that rose as high as 1.5 km above the crater rim and entered a weather cloud. An explosion at 2006 on 15 July ejected large rocks as far as 300 m from the crater. The Alert Level remained at 2 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Yasur (Vanuatu) | 15 July-21 July 2020 | Continuing ActivityCite this Report
Yasur Vanuatu Volcanic Arc	Based on webcam images and satellite data the Wellington VAAC reported that on 19 July ash plumes from Yasur rose to 1.5 km (5,000 ft) a.s.l. Diffuse ash plumes rose to 1.2 km (4,000 ft) a.s.l. and drifted NNE. Source: Wellington 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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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)