All times are local unless otherwise stated.

Bulusan (Philippines) | 22 June-28 June 2016 | New Activity / Unrest Cite this Report
Bulusan Eastern Philippine Volcanic Arc	PHIVOLCS reported that during 0900-0918 on 23 June Bulusan's NW summit vent vigorously emitted dirty-white steam plumes that drifted down the WNW flank. The color of the plume suggested low-energy ash emissions; no seismic signals surrounding the event were detected, indicating a shallow source. Minor amounts of ash fell in the neighborhoods of Poblacion (11 km NW), Añog (12 km NW), and Bacolod (13 km NW) in the Municipality of Juban, and Mabini (12 km NNW) in the Municipality of Casiguran. A sulfur odor was detected in the neighborhoods of Mabini, Bacolod, Añog, and Puting Sapa (Juban). Steam plumes rose as high as 200 m during 25-26 June and drifted NW; steam plumes drifted down the flank on 28 June. The Alert Level remained at 1, indicating abnormal conditions and a 4-km-radius Permanent Danger Zone (PDZ). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Kanlaon (Philippines) | 22 June-28 June 2016 | New Activity / Unrest Cite this Report
Kanlaon Negros-Sulu Volcanic Arc	PHIVOLCS reported that during 22-23 and 25-26 June white steam plumes from Kanlaon rose as high as 800 m and drifted NW and SW; wispy steam plumes were observed on 27 June. Starting at 1640 on 23 June the seismic network recorded a 4-minute-long, explosion-type signal; weather clouds prevented visual observations of the summit area. The Alert Level remained at 1 (on a scale of 0-5). Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
Pacaya (Guatemala) | 22 June-28 June 2016 | New Activity / Unrest Cite this Report
Pacaya Central America Volcanic Arc	INSIVUMEH reported that the seismic network at Pacaya recorded weak explosions during 23-28 June. During 23-25 June blue and white fumarolic plumes rose 100 m and drifted S and SW. Faint incandescence from the crater was visible on some nights; abundant incandescence was noted during 27-28 June. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Santa Maria (Guatemala) | 22 June-28 June 2016 | New Activity / Unrest Cite this Report
Santa Maria Central America Volcanic Arc	In a special report posted on 23 June, INSIVUMEH reported that a strong explosion at Caliente cone, part of Santa María's Santiaguito lava-dome complex, occurred at 1337 and generated avalanches on the SE and SW flanks, and a very dense ash plume that rose 2 km and drifted SW and S. Gas plumes rose 50 m above the crater during 26-28 June. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Turrialba (Costa Rica) | 22 June-28 June 2016 | New Activity / Unrest Cite this Report
Turrialba Central America Volcanic Arc	OVSICORI-UNA reported that at 2030 on 23 June tremor increased at Turrialba and continued to fluctuate through the next day. At 0544 on 24 June a short-lived (less than three minutes) emission of ash and gas rose no higher than 200 m above the crater. A small gas-and-ash plume rose from the crater at 0650. Wind directions shifted from NW to SW. Tremor disappeared at 0740 but then reappeared at 0850 and continued. Neighborhoods in San José reported ashfall and a sulfur odor. From 2005 on 24 June through 1500 on 25 June there were 14 episodes of increased tremor amplitude, accompanied by gas-and-ash emissions that rose no more than 200 m. Rocks were occasionally ejected from the crater. A few more periods of increased tremor and ash-and-gas emissions were recorded later that evening and the morning of 26 June. Several neighborhoods in San José and Heredia reported ashfall and a sulfur odor. Between 0604 and 1930 on 26 June the seismic network recorded almost continuous, variable-amplitude volcanic tremor, with frequent spikes in amplitude associated with passive gas-and-ash emissions. At around 1930 tremor amplitude decreased and ash emissions ceased. Local areas continued to report ashfall. Tremor again increased on 28 June at 2159, though the height of the associated ash emissions was not distinguishable. Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)

Alaid (Russia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Alaid Kuril Volcanic Arc	KVERT reported that moderate activity at Alaid continued during 17-24 June. Satellite images showed a thermal anomaly over the volcano during 18, 20, and 22-23 June. The Aviation Color Code remained at Orange (the second highest level on a four-color scale). Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Chirpoi (Russia) | 22 June-28 June 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 during 20 and 22-23 June. The Aviation Color Code remained at Yellow. Source: Sakhalin Volcanic Eruption Response Team (SVERT)
Colima (Mexico) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Colima Trans-Mexican Volcanic Belt	Based on satellite images and wind data, the Washington VAAC reported that on 23 June an ash plume from Colima rose to an altitude of 5.8 km (19,000 ft) a.s.l. and drifted SW. Source: Washington Volcanic Ash Advisory Center (VAAC)
Dukono (Indonesia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Dukono Halmahera Volcanic Arc	Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 27-29 June ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted E. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Fuego (Guatemala) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Fuego Central America Volcanic Arc	INSIVUMEH reported that during 23-24 June explosions at Fuego occurred at a rate of 2-5 per hour, and generated ash plumes that rose 650-950 m above the crater and drifted 10 km SW, W, NW, and N. Lava fountains rose as high as 200 m above the crater, and fed a lava flow that traveled 600 m SE down the Las Lajas (SE) drainage. In a special bulletin from 1200 on 26 June, INSIVUMEH stated that the tenth episode of effusive activity at Fuego had ended, having lasted for a period of over 30 hours. The report noted that weak explosions continued, producing ash plumes that rose as high as 850 m and drifted 10 km S, SW, and W. Lava flows had advanced to 600 and 800 m in the El Jute (SE) and Las Lajas drainages, respectively. Explosions during 26-28 June generated ash plumes that rose 550-850 m and drifted SSW. Weak shock waves from explosions were detected during 26-27 June, and abundant crater incandescence was visible during 27-28 June. Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
Grimsvotn (Iceland) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Grimsvotn Iceland Neovolcanic Rift Zone	On 23 June the Icelandic Meteorological Office (IMO) stated that the water level of the Skaftá river at Sveinstindur (the closest gauging station at 28 km downstream from the ice margin) and electrical conductivity both rose in recent days, indicating the beginning of a glacial outburst flood (jökulhlaup), originating from [the Western Skaftá ice cauldron, abotu 20 km NW of Grímsvötn]. The western ice cauldron last drained in June 2015. The discharge rate of Skaftá at Sveinstindur was 112 m³/s. IMO warned that hydrogen sulfide released from the floodwater as it drains is particularly potent at the river outlet from the ice margin, where concentrations may reach poisonous levels. Source: Icelandic Meteorological Office (IMO)
Kilauea (United States) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Kilauea Hawaiian-Emperor Hotspot Volcano Group	HVO reported that during 22-28 June 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. A lava flow originating from a vent on Pu'u 'O'o Crater's E flank continued to advance and spread SE. Webcams recorded bright incandescence from several skylights along the upper part of the tube system supplying lava to the front part of the flow. The advancement rate of the flow front was 100 m/day the previous week and by 24 June the lava flow had entered the N part of the abandoned Royal Gardens subdivision. The advancement rate had increased to 300 m/day during 25-28 June; satellite images acquired on 27 June revealed that the lava flow was 6.3 km long and was progressing down the pali along the W boundary of the subdivision. Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
Klyuchevskoy (Russia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Klyuchevskoy Eastern Kamchatka Volcanic Arc	KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 17-24 June. Satellite and video data showed a lava flow continuing to effuse on the SE flank. Satellite images showed an intense thermal anomaly over the volcano, and an ash plume drifting almost 30 km E on 18 June. The Aviation Color Code was raised to Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Nevado del Ruiz (Colombia) | 22 June-28 June 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 at 0822 on 27 June and at 0748 on 28 June episodes of volcanic tremor were associated with ash emissions that rose 1.8 and 0.9 km above Nevado del Ruiz, respectively. The emissions were confirmed by national park authorities and local residents. The Alert Level remained at III (Yellow; "changes in the behavior of volcanic activity"). Source: Servicio Geológico Colombiano (SGC)
Poas (Costa Rica) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Poas Central America Volcanic Arc	According to news articles, phreatic explosions from the hot lake at Poás occurred multiple times in June. Explosions at 0900 on 5 June, 1854 on 13 June, and 1952 on 14 June ejected water and steam many meters above the lake’s surface. Three small explosions, lasting about five seconds each based on the seismic signals, occurred during 0600-0603 on 18 June and ejected water, steam, and debris no more than 50 m above the lake’s surface. Phreatic explosions were also registered on 19 June. Sources: Prensa Libre, Prensa Latina
Reventador (Ecuador) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Reventador Andean Northern Volcanic Arc	On 24 June IG stated that surficial activity at Reventador had remained high during recent months. While conducting routine maintenance work of the monitoring network on 8 June, IG staff noted continuous gas-and-water-vapor emissions rising 800 m above the crater and drifting NW. Explosions produced sounds similar to gunshots and generated ash plumes that rose 2 km. Deposits from pyroclastic flows and ejected incandescent blocks were evident on all flanks, but particularly the N and S flanks. Source: Instituto Geofísico-Escuela Politécnica Nacional (IG-EPN)
Sheveluch (Russia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Sheveluch Eastern Kamchatka Volcanic Arc	KVERT reported that during 17-24 June lava-dome extrusion onto Sheveluch’s N flank was accompanied by strong fumarolic activity, dome incandescence, ash explosions, and hot avalanches. Satellite images showed an intense thermal anomaly over the dome. The Aviation Color Code remained at Orange. Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
Sinabung (Indonesia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Sinabung Sunda Volcanic Arc	Based on PVMBG ground-based observations, the Darwin VAAC reported that during 25-27 June ash plumes from Sinabung rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted E. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Tengger Caldera (Indonesia) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Tengger Caldera Sunda Volcanic Arc	Based on satellite images and model data, the Darwin VAAC reported that during 24-28 June ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted 55 km SW and W. Source: Darwin Volcanic Ash Advisory Centre (VAAC)
Yasur (Vanuatu) | 22 June-28 June 2016 | Continuing ActivityCite this Report
Yasur Vanuatu Volcanic Arc	On 28 June the Vanuatu Geohazards Observatory stated that the Alert Level for Yasur remained at 2 (on a scale of 0-4) and that explosions continued to be intense. VGO reminded residents and tourists that hazardous areas were near and around the volcanic crater, and that volcanic ash and gas could reach areas impacted by trade winds. Source: Vanuatu Meteorology and Geohazards Department (VMGD)

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)