All times are local unless otherwise stated.

Kilauea (United States) | 13 July-19 July 2016 | New Activity / Unrest Cite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	HVO reported that during 13-19 July the lava lake continued to rise and fall, circulate, and spatter in Kilauea's Overlook vent. Several incandescent vents on Pu'u 'O'o Crater's floor were evident in webcam images. The 61G lava flow, originating from a vent on Pu'u 'O'o Crater's E flank, continued to advance across the coastal plain. By midday on 15 July the lava flow was about 870 m from the ocean, advancing only 60 m since 12 July. A satellite image acquired on 17 July showed that the flow front was 820 m from the ocean. By the evening of 18 July the flow tip had stalled but breakouts were active a few hundred meters upslope. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Manam (Papua New Guinea) | 13 July-19 July 2016 | New Activity / Unrest Cite this Report
Manam Bismarck Volcanic Arc	Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 13 July an ash plume from Manam rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 55 km W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Pacaya (Guatemala) | 13 July-19 July 2016 | New Activity / Unrest Cite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported some weak explosions and fumarolic emissions at Pacaya during 16-18 July. Incandescence from the crater was visible at night or early in the morning. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)

Alaid (Russia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Alaid Kuril Volcanic Arc	KVERT reported that Strombolian activity at a new cinder cone in Alaid's summit crater was detected during 8-15 July, with lava flowing down the SW flank. Satellite images showed a thermal anomaly at the volcano during 7 and 11-13 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Bagana (Papua New Guinea) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Bagana Solomon Volcanic Arc	Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 17-18 July ash plumes from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted over 90 km W and NW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Bristol Island (United Kingdom) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Bristol Island South Sandwich Volcanic Arc	The Buenos Aires VAAC reported that on 19 July a diffuse ash plume from Bristol Island's Mt. Sourabaya was visible in satellite images drifting 30 km NE. A persistent thermal anomaly was also identified in satellite data. Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)
Chirpoi (Russia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Chirpoi Kuril Volcanic Arc	SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images on 13 July. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Colima (Mexico) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	Based on satellite and webcam images, the Washington VAAC reported that on 17 July an ash emission from Colima rose to an altitude of 4.9 km (16,000 ft) a.s.l., drifted just over 10 km NW, and quickly dissipated. The next day an ash plume rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted W. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery, information from PVMBG, and model data, the Darwin VAAC reported that during 13-19 July ash plumes from Dukono rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted as far as 225 km NW, W, and SW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that on 15 July activity at Fuego increased, characterized by eight explosions per hour detected by the seismic network and ash plumes that rose 1.1 km above the crater. Ash fell on the W and SW flanks. During 17-19 July there were 3-6 explosions per hour detected. Ash plumes rose as high as 850 m above the crater and drifted at least 12 km W and SW, causing ashfall in areas downwind including Yepocapa (8 km N), Sangre de Cristo (8 km WSW), and Panimaché I and II (8 km SW). Some explosions generated shock waves that rattled nearby homes and sounds resembling jet engines were heard every 3-8 minutes. Incandescent material was ejected 100-200 m high, and avalanches reached vegetated areas. Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Coordinadora Nacional para la Reducción de Desastres (CONRED)
Klyuchevskoy (Russia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 8-15 July. Volcanic bombs were ejected 200-300 m above the summit crater and 50 m above a cinder cone, and landed in the Apakhonchich drainage on the SE flank. A lava flow traveled down the Apakhonchich drainage. Satellite images showed a large and intense daily thermal anomaly at the volcano, and ash plumes drifting 170 km NE during 11-12 July. The Aviation Color Code was raised to Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Nevado del Ruiz (Colombia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Nevado del Ruiz Andean Northern Volcanic Arc	Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 12-18 July seismicity at Nevado del Ruiz slightly increased as compared to levels the week before. Several episodes of “drumbeat” earthquakes were recorded during 13, 15, and 16-17 July. These signals were low energy and indicated a growing lava dome. Significant amounts of water vapor and gas rose from the crater. Gas, steam, and ash plumes rose at most 500 m above the crater rim and drifted NW on 13, 14, 16, and 17 July. The Alert Level remained at III (Yellow; the second lowest level on a four-color scale). Source: Servicio Geológico Colombiano (SGC)
Pavlof (United States) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Pavlof Aleutian Ridge Volcanic Arc	AVO reported that seismic activity at Pavlof remained elevated during 13-19 July. A steam plume was visible in satellite images and reported by observers in Sand Point (90 km E) on 18 July. The next day persistent steam plumes with occasional minor ash-producing explosions were observed in satellite views. The Aviation Color Code remained at Yellow and Volcano Alert Level remained at Advisory. Source: US Geological Survey Alaska Volcano Observatory (AVO)
Sangay (Ecuador) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Sangay Andean Northern Volcanic Arc	Based on satellite images and wind data, the Washington VAAC reported that on 16 July a possible ash plume from Sangay rose to an altitude of 5.8 km (19,000 ft) a.s.l. and drifted 22 km SW. Source: Washington Volcanic Ash Advisory Center (VAAC)
Santa Maria (Guatemala) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Santa Maria Central America Volcanic Arc	INSIVUMEH reported that at 1330 on 15 July an explosion at Santa María's Santiaguito lava-dome complex generated an ash plume that rose 2.4 km and drifted NW. Gas plumes rose from the complex during 17-18 July. At 0235 on 19 July an explosion generated avalanches and a pyroclastic flow that traveled SE down Caliente dome. An ash plume rose 1 km and drifted SW. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Sheveluch (Russia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 8-15 July lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed a daily thermal anomaly over the dome. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on satellite images, model data, and ground reports from PVMBG, the Darwin VAAC reported that during 15-16 and 19 July ash plumes from Sinabung rose to an altitude of 4.6 km (15,000 ft) a.s.l. and drifted NW, W, and SW. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Suwanosejima (Japan) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Suwanosejima Ryukyu Volcanic Arc	Based on JMA notices, satellite-image analyses and pilot observations, the Tokyo VAAC reported that during 18-19 July ash plumes from Suwanosejima rose to altitudes of 1.8-2.7 km (6,000-9,000 ft) a.s.l. and drifted NE. Source: Tokyo Volcanic Ash Advisory Center (VAAC)
Tengger Caldera (Indonesia) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Tengger Caldera Sunda Volcanic Arc	Based on satellite images, wind data, and information from PVMBG, the Darwin VAAC reported that during 13-16 and 19 July ash plumes from Tengger Caldera's Bromo cone rose to altitudes of 2.1-3.3 km (7,000-11,000 ft) a.s.l. and drifted over 45 km NW, SW, and SE. BNPB reported that the Abdul Rachman Saleh Airport in Malang (26 km W) closed again due to ash, from 2307 on 15 July to 0900 on 16 July; six flights were diverted and two were cancelled. Minor amounts of ash fell in the communities of Probolinggo (35 km NE) and Lumajang (36 km SW). The Alert Level remained at 2 (on a scale of 1-4); residents and visitors were reminded not to approach the crater within a radius of 1 km. Sources: Darwin Volcanic Ash Advisory Centre (VAAC), Badan Nacional Penanggulangan Bencana (BNPB)
Turrialba (Costa Rica) | 13 July-19 July 2016 | Continuing ActivityCite this Report
Turrialba Central America Volcanic Arc	OVSICORI-UNA reported that at 1330 on 13 July Turrialba produced a weak ash emission that rose 100 m and drifted W. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

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)