All times are local unless otherwise stated.

Colima (Mexico) | 8 July-14 July 2015 | New Activity / Unrest Cite this Report
Colima Trans-Mexican Volcanic Belt	In a 7 July bulletin, the Unidad Estatal de Protección Civil de Colima reported that during the previous week explosions from a fast-growing lava dome at Colima generated ash plumes that rose 3 km above the crater. Incandescent rock avalanches, from explosions and the lava dome overtopping the crater rim, descended the flanks. Ashfall was reported in various communities downwind. The report warned the public not to enter an area within a 5-km radius of the crater, and to avoid drainages within 14 km due to lahar hazards. La Coordinación Nacional de Protección Civil reported that during 7-10 July a gradual increase in the number of emissions and landslides was detected. Pyroclastic flows traveled at most 2.5 km down the N, W, and S flanks. During 9-10 July incandescent material was ejected from the crater. Based on satellite images and webcam views, the Washington VAAC reported an intense thermal anomaly and constant ash emissions on 10 July. A large event at 1200 produced an ash plume that rose to an altitude of 7.6 km (25,000 ft) a.s.l. and drifted 150 km W. La Coordinación Nacional de Protección Civil noted that activity further increased at 2017 on 10 July, characterized by incandescent material descending the WSW flanks, pyroclastic flows, and ash plumes that rose 4 km above the crater. Ash fell in the communities of La Yerbabuena (5-cm-thick ash deposits), La Becerrera (88 SW), San Antonio, Carrizalillo, El Naranjal, Nuevo Naranjal, and Suchitlán (18 km SSW) in Colima State. The Unidad Estatal de Protección Civil de Colima ordered 19 residents in La Yerbabuena to evacuate, and some residents in nearby towns self-evacuated. A pyroclastic flow traveled 9 km S. By 1030 on 11 July there were 70 confirmed evacuees in shelters. Citing large eruptions in the past, La Coordinación Nacional de Protección Civil enforced a preventative evacuation within 12 km of the crater. Ashfall was reported in Comala, Villa de Alvarez, and Colima. An additional 70 people had evacuated, and the national airport, El Aeropuerto Nacional de Colima, suspended operations due to ashfall. Ejected incandescent material, ash emissions, incandescent landslides, and pyroclastic flows continued at a moderate level during 11-12 July. Evacuations continued on 12 July, and ashfall persisted in Comala, Villa de Alvarez, and Colima. The report noted that La Unidad Estatal de Protección Civil and Bomberos de Jalisco continued to monitor the towns of Lomas de las Flores and San José del Carmen, and the municipality of Zapotitlán de Vadillo because they were the areas most affected by ashfall. Sources: Unidad Estatal de Protección Civil de Colima, La Coordinación Nacional de Protección Civil, Washington Volcanic Ash Advisory Center (VAAC)
Hakoneyama (Japan) | 8 July-14 July 2015 | New Activity / Unrest Cite this Report
Hakoneyama Izu Volcanic Arc	On 12 July JMA reported that the webcam continued to record vigorous fumarolic plumes rising from Hakoneyama's Owakudani hot spring area. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Raung (Indonesia) | 8 July-14 July 2015 | New Activity / Unrest Cite this Report
Raung Sunda Volcanic Arc	PVMBG reported that during 1-8 July gray plumes rose 100-500 m above Raung’s crater rim, crater incandescence was observed, and rumbling and thumping sounds were noted. Seismicity was dominated by high-amplitude tremor; deformation data suggested magma migrating to the surface. The Alert Level remained at 3 (on a scale of 1-4), and the public was reminded not to approach the crater within a 3-km radius. BNPB reported that gray ash plumes continued to rise as high as 500 m above the crater through 11 July. Ash plumes drifted in various directions depending on the altitude: SE and S at lower altitudes and SE, S, W, and N at higher altitudes. Based on PVMBG notices, wind data, and satellite images, the Darwin VAAC reported that during 8-12 July ash plumes rose to an altitude of 4.3-5.2 km (14,000-17,000 ft) a.s.l. and drifted as far as 1,040 km E, SE, and S. According to news articles, increased activity during 9-10 July caused flight cancelations and several airports to close, including those on Bali and Lombok, and in Banyuwangi and Jember in East Java. The article also noted that dozens of flight had been canceled during the previous week. Another article noted that the Bali airport, in addition to another airport in Java, again closed on 12 July, a day after it had reopened. Sources: Badan Nacional Penanggulangan Bencana (BNPB), Darwin Volcanic Ash Advisory Centre (VAAC), Agence France-Presse (AFP), The Weather Channel
Sangeang Api (Indonesia) | 8 July-14 July 2015 | New Activity / Unrest Cite this Report
Sangeang Api Sunda Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 8 July an ash plume from Sangeang Api rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted over 35 km SE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Sirung (Indonesia) | 8 July-14 July 2015 | New Activity / Unrest Cite this Report
Sirung Sunda Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 8 July an ash plume from Sirung drifted 55 km W at an altitude of 1.5 km (5,000 ft) a.s.l. Source: Darwin Volcanic Ash Advisory Centre (VAAC)

Aira (Japan) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Aira Ryukyu Volcanic Arc	JMA reported that during 6-13 July small-scale explosions occurred at Showa Crater at Aira Caldera’s Sakurajima volcano. One larger explosion ejected ballistics 200-300 m above the crater. Incandescence from the crater was occasionally visible at night. Rumbling was occasionally heard several tens of kilometers away. The Alert Level remained at 3 (on a 5-level scale). Source: Japan Meteorological Agency (JMA)
Dukono (Indonesia) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 9-14 July ash plumes from Dukono rose to altitudes of 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted 35-185 km NW, N, and NE. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Karymsky (Russia) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Karymsky Eastern Kamchatka Volcanic Arc	KVERT reported that explosive activity at Karymsky likely continued during 3-10 July; a thermal anomaly over the volcano was visible in satellite images on 6 July. Weather clouds obscured views of the volcano on the other days. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Kilauea (United States) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 8-14 July. The lava lake continued to circulate and spatter in the Overlook vent. Webcams recorded multiple incandescent outgassing vents within Pu'u 'O'o. The June 27th NE-trending lava flow continued to be active with surface flows within 8 km NE of Pu'u 'O'o Crater. Satellite images showed expansion of the flow field since 6 July, with gradual northward advancement of the most western and north-pointing branch of the flow field. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Sheveluch (Russia) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 3-10 July lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity. Satellite images showed a thermal anomaly over the dome during 2-4 July. Ash plumes that rose as high as 3.3 km (10,800 ft) a.s.l. were observed during 5-6 July. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Shishaldin (United States) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Shishaldin Aleutian Ridge Volcanic Arc	AVO reported that seismicity at Shishaldin continued to be elevated over background levels 8-14 July indicating that low-level eruptive activity confined to the summit crater likely continued. Cloud cover prevented satellite and webcam observations. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Sinabung (Indonesia) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	On 11 July, BNPB reported that activity at Sinabung remained high and was characterized by avalanches, continuous tremor, and high lava-dome growth. The Alert Level remained at 4 (on a scale of 1-4), indicating that people within 7 km of the volcano on the SE sector, and within 6 km in the E sector, should evacuate or remain in alternative housing. Source: Badan Nacional Penanggulangan Bencana (BNPB)
Tungurahua (Ecuador) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Tungurahua Andean Northern Volcanic Arc	IG reported moderate seismic activity at Tungurahua during 8-14 July, characterized by long-period events, minor instances of tremor, and a few explosions. Cloud cover often prevented visual observations. Steam-and-ash plumes during 9-10 July rose 500 m above the crater and drifted W; minor ashfall was reported in Choglontus (13 km WSW) and El Manzano (8 km SW). An explosion on 12 July produced an ash plume that rose 2 km and caused windows to vibrate in Juive (NW). An explosion on 13 July generated an ash plume that rose 1 km. The next day ashfall was reported in Palitahua (6 km SSW). Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Ubinas (Peru) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Ubinas Andean Central Volcanic Arc	Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 7-13 July seismic activity declined. Volcano-tectonic earthquakes continued to decrease and the rate of long-period events slightly increased as compared to the previous week. The number of hybrid events decreased, and tremor associated with emissions was greatly reduced. Explosions were observed on 9 and 11 July, producing ash plumes that drifted NE, E, and S. Ash emissions were observed on other days as well. Source: Instituto Geofísico del Perú (IGP)
Zhupanovsky (Russia) | 8 July-14 July 2015 | Continuing ActivityCite this Report
Zhupanovsky Eastern Kamchatka Volcanic Arc	KVERT reported that explosive activity at Zhupanovsky probably continued during 3-10 July; ash plumes drifted SW on 6 July. Weather clouds obscured views of the volcano on the other days. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)

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)