All times are local unless otherwise stated.

Asosan (Japan) | 1 May-7 May 2019 | New Activity / Unrest Cite this Report
Asosan Nankai Volcanic Arc	JMA reported that sulfur dioxide emissions at Asosan’s Nakadake Crater continued to be very high at 3,200 tons per day on 2 May. At night during 2-3 May webcams recorded weak incandescence from the crater. At 1540 on 3 May a very small eruption produced an off-white plume that rose 600 m above the crater rim. Later that day, at 1948, an ash plume rose 2 km and, according to the Tokyo VAAC, drifted S. Emissions from eruptive events continued until 0620 on 5 May, rising to 500 m. Afterwards white plumes rose as high as 1.1 km, at least through 7 May. Crater incandescence continued to be visible. During a field survey on 4 May ashfall was confirmed in areas downwind including parts of Takamori (7 km SSE), Minamiaso village (8 km SW), and Yamato (24 km SSW). Sulfur dioxide emissions were 4,000 tons per day on 4 May, and 3,100 tons per day on 6 May. The Alert Level remained at 2 (on a scale of 1-5). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Colima (Mexico) | 1 May-7 May 2019 | New Activity / Unrest Cite this Report
Colima Trans-Mexican Volcanic Belt	Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima reported increased seismicity at Colima during 20-26 April characterized by a considerable increase in the number of high-frequency and volcano-tectonic events. On 26 April a consensus was reached to raise the Alert Level to Yellow (the second lowest level on a four-color scale) and extend the exclusion zone to a 8-km radius during a meeting of the Coordinación Nacional de Protección Civil (CNPC), the Unidad Estatal de Protección Civil Colima (UEPC), the Unidad Estatal de Protección Civil y Bomberos de Jalisco (UEPCBJ), the Universidad de Colima (UdeC), and la Universidad de Guadalajara (UdeG). Seismicity continued to be elevated through 3 May. The largest events (M 2.4-3) were located 0.5-3 km deep in the N and NE parts of the volcano. Source: Centro Universitario de Estudios Vulcanológicos (CUEV) - Universidad de Colima
Klyuchevskoy (Russia) | 1 May-7 May 2019 | New Activity / Unrest Cite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that a weak thermal anomaly over Klyuchevskoy was identified in satellite images during 26 April-3 May. The Aviation Color Code was raised to Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 1 May-7 May 2019 | New Activity / Unrest Cite this Report
Sinabung Sunda Volcanic Arc	PVMBG and BNPB reported that an eruption at Sinabung at 0641 on 7 May generated a dense ash plume that rose 2 km above the crater rim and drifted SW [correction: the plume drifted SE], causing the sky to turn dark in some areas. The eruption lasted 42 minutes and 49 seconds according to the seismic data. Ashfall was reported on farms in many villages in the Simpang Empat (7 km SE), Namanteran, Kabanjahe, and Berastadi districts. The Alert Level remained at 4 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions to 7 km on the SSE sector, 6 km in the ESE sector, and 4 km in the NNE sector. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB), Darwin Volcanic Ash Advisory Centre (VAAC), The Jakarta Post

Agung (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Agung Sunda Volcanic Arc	PVMBG reported that an event at Agung was recorded by the seismic network at 1859 on 3 May. An ash plume was not visible from the Agung Volcano Observatory in Rendang (about 8 km SW), although the Darwin VAAC report a growing thermal anomaly and possible ash near the summit. About 30 minutes later the VAAC reported that an ash plume rose to 4.3 km (14,000 ft) a.s.l. and drifted NE; a thermal anomaly continued to be visible. On 6 May at 2255 a gray ash plume rose to around 2 km above the crater rim and drifted W. The Alert Level remained at 3 (on a scale of 1-4) with the exclusion zone set at a 4-km radius. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Aira (Japan) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that incandescence from Minamidake crater (at Aira Caldera’s Sakurajima volcano) was occasionally visible at night during 29 April-7 May. Five explosions generated plumes that rose as high as 1.6 km above the crater rim. The Tokyo VAAC noted that plumes drifted E, SE, and SW during 1-2, 4, and 6 May. The Alert Level remained at 3 (on a 5-level scale). Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on satellite and wind model data, the Darwin VAAC reported that during 1-7 May ash plumes from Dukono rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted E and ESE. The Alert Level remained at 2 (on a scale of 1-4), and visitors were 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 May-7 May 2019 | Continuing ActivityCite this Report
Ebeko Kuril Volcanic Arc	Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 26 April-3 May that sent ash plumes up to 3 km (10,000 ft) a.s.l. 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) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Etna Sicily Volcanic Province	INGV reported that during 22-28 April ash emissions rose from Etna’s Bocca Nuova Crater, Northeast Crater (NEC), and from the E vent in New Southeast Crater (NSEC). Pulsating incandescence from NSEC’s E vent was recorded at night by webcams. A new vent on the inner wall of Voragine Crater was noted on 30 April. Strombolian activity from the BN-1 crater deep within the Bocca Nuova Crater was visible on 28 April and continued through 5 May; field inspections on 30 April revealed that two vents in BN-1 were active and producing explosions at a rate of one every 2-3 seconds. Bombs and lapilli were ejected above the crater rim but deposits remained mostly within the confines of the crater or near the rim. Strombolian activity was visible at NSEC during 29 April-5 May. On 2 May, beginning at 0131, discontinuous explosions at the E vent produced emissions of fine tephra that rose as high as 1 km above the crater rim and quickly dissipated. During 5-6 May the frequency of explosions increased for brief periods in conjunction with a slight increases in volcanic tremor amplitude. Source: Sezione di Catania - Osservatorio Etneo (INGV)
Ibu (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Ibu Halmahera Volcanic Arc	The Darwin VAAC reported that on 7 May an ash plume from Ibu was visible in satellite data rising to an altitude of 2.4 km (8,000 ft) a.s.l. and drifting ESE. 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. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that a weak thermal anomaly over Karymsky was visible in satellite images during 27 and 30 April and 1 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kerinci (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Kerinci Sunda Volcanic Arc	In a Volcano Observatory Notice for Aviation (VONA) PVMBG noted that local residents reported ashfall from Kerinci in areas 7 km S and NE. According to a news article at least five villages were affected late on 2 May, including Tanjung Bungo, Sangir, Sangir Tengah, Sungai Rumpun, and Bendung Air. A brown ash emission was observed at 1836 on 3 May rising 800 m above the crater rim and drifting ESE. Seismicity was dominated by continuous volcanic tremor and signals indicating gas emissions. The next day at 1708 a brown ash emission rose 300 m and drifted SE. According to the Darwin VAAC an ash emission was observed by a pilot at 0610 on 5 May drifting NE at an altitude of 6.7 km (22,000 ft) a.s.l. The Alert Level remained at 2 (on a scale of 1-4), and tourists were warned to remain outside of the 3-km exclusion zone. Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), UZone
Krakatau (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Krakatau Sunda Volcanic Arc	PVMBG reported that an event at 0519 on 6 May was recorded by Anak Krakatau’s seismic network, although no emission was visually observed. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 2-km radius hazard zone from the crater. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Merapi (Indonesia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Merapi Sunda Volcanic Arc	PVMBG reported that during 22-28 April the lava dome at Merapi continued to grow slowly, with any extruded material channeled into the SE-flank Gendol River drainage. White emissions rose 70 m. Five block-and-ash flows traveled as far as 1.2 km in the Gendol drainage on 24 April. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to remain outside of the 3-km exclusion zone. Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
Nyamulagira (DR Congo) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Nyamulagira Albertine Rift Volcanic Province	The Observatoire Volcanologique de Goma (OVG) reported that during early April Nyamuragira’s lava lake, which had returned in April 2018 after almost a year of quiet, continued to be active. Beginning on 12 April seismic and lava-lake activity both declined. MIROVA data showed that the thermal radiative power was at moderate levels the first half of the month then declined to low levels during the second half. Source: Observatoire Volcanologique de Goma (OVG)
Nyiragongo (DR Congo) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Nyiragongo Albertine Rift Volcanic Province	The Observatoire Volcanologique de Goma (OVG) reported that during 1-28 April Nyiragongo’s lava lake continued to be active, extending the episode of ongoing activity to almost 17 years. A secondary cone which had formed on 29 February 2016 was also active, as well as three other vents surrounding it. Sulfur dioxide emissions reached a high of at least 5,000 tonnes per day, greater than March highs of 2,900 tonnes per day, but still below the alert threshold. Source: Observatoire Volcanologique de Goma (OVG)
Poas (Costa Rica) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Poas Central America Volcanic Arc	OVSICORI-UNA reported a period of continuous emissions from Poás during 30 April-1 May with plumes rising 300 m above the crater rim and drifting SW. Ash emissions were visible for a few hours on 30 April, and incandescence was visible at night. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
Sheveluch (Russia) | 1 May-7 May 2019 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that a thermal anomaly over Sheveluch’s lava dome was identified daily in satellite images during 26 April-3 May. Plumes of re-suspended ash were visible drifting 200 km SE during 30 April-2 May. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

Weekly Reports Archive

Since the Weekly Volcanic Activity Report began in November 2000, there have been 20,652 individual reports over 1,244 weeks (average of 17 per week) on 338 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)