All times are local unless otherwise stated.

Bulusan (Philippines) | 1 July-7 July 2020 | New Activity / Unrest Cite this Report
Bulusan Eastern Philippine Volcanic Arc	PHIVOLCS reported that the seismic network at Bulusan recorded 53 volcanic earthquakes during 3-6 July, including 43 low-frequency events associated with weak shallow hydrothermal or magmatic gas movement. Despite visible degassing or steaming from the active vent in 2020, increased seismicity may still be followed by phreatic activity at the summit or from flank vents. Additionally, GPS data indicated short-term inflation since late February. On 6 July the Alert Level was raised to 1, indicating abnormal conditions, and the public was reminded of the 4-km-radius Permanent Danger Zone (PDZ). There were 19 volcanic earthquakes recorded during 6-7 July, and diffuse white steam plumes rose from the lower SE vent. Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Laguna del Maule (Chile) | 1 July-7 July 2020 | New Activity / Unrest Cite this Report
Laguna del Maule Andean Southern Volcanic Arc	SERNAGEOMIN reported that, although the number and magnitude of earthquakes had decreased during 20-30 June, seismicity at the Laguna del Maule Volcanic Complex continued to remain anomalously elevated at east through 7 July. The location of the activity remained within an area about 5 km in diameter, near the intersection of two faults near Las Nieblas, and corresponded to elevated levels of carbon dioxide emissions. The Alert Level remained at Yellow, the second lowest color on a four-color scale; ONEMI recommended restricted access within a radius of 2 km from the emission center. Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)
Nishinoshima (Japan) | 1 July-7 July 2020 | New Activity / Unrest Cite this Report
Nishinoshima Ogasawara Volcanic Arc	JMA reported that the eruption at Nishinoshima had been particularly vigorous since mid-June, producing a large amount of ash. Based on satellite data, the Tokyo VAAC reported that during 1-3 and 5-7 July ash plumes rose to 2.7-4.9 km (9,000-16,000 ft) a.s.l. and drifted N and NW, and sometimes SW. On 4 July, ash plumes rose to 8.3 km above the summit (or to 24,000-28,000 ft. a.s.l.), the highest recorded plume since the volcano became active in 2013. Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Turrialba (Costa Rica) | 1 July-7 July 2020 | New Activity / Unrest Cite this Report
Turrialba Central America Volcanic Arc	OVSICORI-UNA reported that small ash emissions rose to low heights above the active crater at Turrialba almost daily during 1-7 July; no emissions were recorded on 3 July. A plume of gas and ash rose hundreds of meters at 0900 on 6 July, causing local ashfall. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

Aira (Japan) | 1 July-7 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 29 June-3 July; inclement weather prevented visual observations during 4-6 July. The sulfur dioxide emission rate was 1,300 tons per day on 2 July. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Copahue (Chile-Argentina) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Copahue Andean Southern Volcanic Arc	SERNAGEOMIN reported that conditions at Copahue had returned to normal levels and seismicity was low. The Alert Level was lowered to Green (second lowest level on a four-color scale) on 7 July. Source: Servicio Nacional de Geología y Minería (SERNAGEOMIN)
Dukono (Indonesia) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on information from PVMBG and the Darwin VAAC dense white-and-gray ash plumes from Dukono rose as high as 2.4 km (8,000 ft) a.s.l. and drifted NW, W, and SW almost daily during 1-7 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) | 1 July-7 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 26 June-3 July that sent ash plumes up to 4 km (13,123 ft) a.s.l. which drifted S and E. A thermal anomaly over the volcano was identified in satellite images during 26-28 and 30 June. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Karymsky (Russia) | 1 July-7 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 26-30 June. 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) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that Strombolian activity at Klyuchevskoy was visible during 26 June-3 July along with a bright thermal anomaly identified in satellite images. A lava flow continued to advance down the Apakhonchich drainage on the SE flank. Avalanches of material on the S side of the lava flow were sometimes visible. Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Nevados de Chillan (Chile) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Nevados de Chillan Andean Southern Volcanic Arc	SERNAGEOMIN reported that lava began breaching the rim of Nevados de Chillán’s Nicanor Crater around 27 June and had flowed 40 m down the N flank by 1 July. An explosion at 0837 on 6 July generated a gas-and-ash plume that rose 1.2 km above the crater rim and drifted SE. The Alert Level remained at Yellow, the second lowest level on a four-color scale, and residents were reminded not to approach the crater within 3 km. ONEMI stated that Alert Level Yellow (the middle level on a three-color scale) remained in place for the communities of Pinto and Coihueco, noting that as of 16 June the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the NE flank. Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Oficina Nacional de Emergencia-Ministerio del Interior (ONEMI)
Pacaya (Guatemala) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that during 1-7 July Strombolian explosions at Pacaya’s Mackenney Crater ejected material as high as 100 m above the crater rim; explosions were audible as far away as 5 km during 4-5 July. Lava flows 150-500 m long were active on the N, NW, and SW flanks. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sabancaya (Peru) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Sabancaya Andean Central Volcanic Arc	Instituto Geológico Minero y Metalúrgico (INGEMMET) reported that drone footage acquired at Sabancaya on 20 June showed that the lava dome in the main crater had been destroyed, leaving blocks on the crater floor. Explosions at fractured areas generated gas-and-ash plumes. During 23-24 June explosions produced gas-and-ash plumes that rose as high as 1.8 km above the summit and drifted E and SE. Ashfall was reported in areas downwind including in the districts of Chivay, Achoma, Ichupampa, Yanque, and Coporaque, and in the area of Sallali. Instituto Geofísico del Perú (IGP) reported a daily average of 20 explosions during 29 June-5 July. Gas-and-ash plumes rose as high as 3.5 km above the summit and drifted S, SE, NE, and N. There were seven 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. Sources: Instituto Geológico Minero y Metalúrgico (INGEMMET), Instituto Geofísico del Perú (IGP)
Sangay (Ecuador) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Sangay Andean Northern Volcanic Arc	On 2 July IG presented additional results from the Sangay overflight that was conducted on 24 June with the purpose of performing maintenance on a gas and seismic station, taking visual and infrared photos of the surficial activity, and measuring volcanic gases. Three thermal anomalies were identified: the first was in the summit crater and associated with explosions, the second was near the SE rim of the summit crater and possibly highlighted a small lava flow, and the third corresponded to the accumulation of hot deposits of pyroclastic flows at the lower part of the SE drainage. Ash from summit explosions and pyroclastic flows that descended the SE flank dispersed mainly S and W. Notable morphological changes to the summit areas were evident when comparing photographs from 17 May 2019 to 24 June 2020. The maximum width of the SE flank drainage was an estimated 397 m. Due to a large amount of airborne ash in the N, E, and S parts of the volcano, the SAGA station on the SW flank could not be reached and repaired. Winds caused ashfall in populated areas. Gas emission data could also not be obtained due to the amount of airborne ash. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Semeru (Indonesia) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Semeru Sunda Volcanic Arc	PVMBG reported that at 0633 on 7 July an ash plume from Semeru rose 400 m above the summit and drifted W. Weather clouds had prevented visual observations of the volcano during the previous six days. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general restricted area 1 km from the summit and 4 km on the SSE flank. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Sheveluch (Russia) | 1 July-7 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 26 June-3 July. A plume of re-suspended ash drifted 140 km E on 28 June. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Suwanosejima (Japan) | 1 July-7 July 2020 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	JMA reported that nighttime incandescence at Suwanosejima’s Ontake Crater was occasionally visible during 26 June-3 July. An eruptive event on 2 July generated a grayish white plume that rose 1 km above the crater rim. 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 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.

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)