Smithsonian / USGS Weekly Volcanic Activity Report

















New Activity Highlights


 Activity for the week of 20 July-26 July 2016


The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.

Name Location Activity
Chikurachki Paramushir Island (Russia) New
Chirpoi Kuril Islands (Russia) New
Kilauea Hawaiian Islands (USA) New
Pacaya Guatemala New

Alaid Kuril Islands (Russia) Ongoing
Bagana Bougainville (Papua New Guinea) Ongoing
Bulusan Luzon (Philippines) Ongoing
Colima Mexico Ongoing
Dukono Halmahera (Indonesia) Ongoing
Kanlaon Philippines Ongoing
Klyuchevskoy Central Kamchatka (Russia) Ongoing
Nevado del Ruiz Colombia Ongoing
Nevados de Chillán Chile Ongoing
Poas Costa Rica Ongoing
Popocatepetl Mexico Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Sinabung Indonesia Ongoing
Tengger Caldera Eastern Java (Indonesia) Ongoing
Turrialba Costa Rica Ongoing


New Activity/Unrest


Volcano index photo  Chikurachki  | Paramushir Island (Russia)  | 50.324°N, 155.461°E  | Elevation 1781 m

Based on satellite data, KVERT reported that an eruption at Chikurachki began on 27 July. An ash plume, first identified at 1748, rose to altitudes of 4-5 km (13,100-16,400 ft) a.s.l. and drifted about 100 km NE. The Aviation Color Code was raised to Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Chirpoi  | Kuril Islands (Russia)  | 46.525°N, 150.875°E  | Elevation 742 m

SVERT reported that a thermal anomaly over Snow, a volcano of Chirpoi, was detected in satellite images during 18 and 20-24 July. Steam-and-gas emissions were visible drifting SW on 16 July and may have contained minor amounts of ash. Steam-and-gas emissions during 22-24 July drifted as far as 90 km N. The Aviation Color Code remained at Yellow.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)



Volcano index photo  Kilauea  | Hawaiian Islands (USA)  | 19.421°N, 155.287°W  | Elevation 1222 m

HVO reported that during 20-26 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. The most distal part of the flow had stalled on 18 July but was again active by 22 July. Based on National Park personnel observations, the flow front was about 370 m from the ocean by 24 July. At 0112 on 26 July lava reached the ocean. Nighttime webcam views of the flow field showed incandescent areas from skylights, and advancing lava on the pali and coastal plain.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Pacaya  | Guatemala  | 14.381°N, 90.601°W  | Elevation 2552 m

INSIVUMEH reported that during 23-24 July Strombolian explosions at Pacaya's Mackenney cone ejected material 75 m above the crater. During 24-26 July blue and white fumarolic plumes drifted S and N, and faint crater incandescence was visible at night and in the early morning.

Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)



Ongoing Activity


Volcano index photo  Alaid  | Kuril Islands (Russia)  | 50.861°N, 155.565°E  | Elevation 2285 m

KVERT reported that Strombolian activity at a new cinder cone in Alaid's summit crater was detected during 15-22 July, with lava flowing down the SW flank. Satellite images showed a thermal anomaly at the volcano during 19-21 July. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Bagana  | Bougainville (Papua New Guinea)  | 6.137°S, 155.196°E  | Elevation 1855 m

Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 21-23 July ash plumes from Bagana rose to altitudes of 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted 22-55 km SW, W, and NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Bulusan  | Luzon (Philippines)  | 12.77°N, 124.05°E  | Elevation 1565 m

PHIVOLCS reported that on 20 July white-to-light-gray plumes rose to low levels above Bulusan and drifted WNW. During 21-25 July diffuse white plumes rose as high as 250 m above the crater and drifted NW and SW. 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)



Volcano index photo  Colima  | Mexico  | 19.514°N, 103.62°W  | Elevation 3850 m

Based on information from the Mexico City MWO, and webcam and satellite views, the Washington VAAC reported that during 21 and 23-25 July ash plumes from Colima rose to altitudes of 4.3-7 km (14,000-23,000 ft) a.s.l. and drifted W and NW.

Source: Washington Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Dukono  | Halmahera (Indonesia)  | 1.693°N, 127.894°E  | Elevation 1229 m

Based on analyses of satellite imagery, information from PVMBG, and model data, the Darwin VAAC reported that during 20-21, 23, and 25-26 July ash plumes from Dukono rose to altitudes of 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted over 110 km NW, W, and E.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Kanlaon  | Philippines  | 10.412°N, 123.132°E  | Elevation 2435 m

PHIVOLCS reported that during 20-25 July diffuse white plumes rose above Kanlaon; On 20 July plumes were a dirty-white color, and on 25 July they rose 200 m and drifted NW and SW. The Alert Level remained at 1 (on a scale of 0-5).

Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)



Volcano index photo  Klyuchevskoy  | Central Kamchatka (Russia)  | 56.056°N, 160.642°E  | Elevation 4754 m

KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 15-22 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 over 265 km SW and W during 18-19 July. The Aviation Color Code was raised to Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Nevado del Ruiz  | Colombia  | 4.892°N, 75.324°W  | Elevation 5279 m

Based on notices from the Bogota MWO and model data, the Washington VAAC reported that on 24 July a possible ash plume from Nevado del Ruiz rose to an altitude of 7.2 km (23,000 ft) a.s.l. On 26 July an ash plume recorded by the webcam and identified in satellite images rose to an altitude of 6.9 km (22,000 ft) a.s.l. and drifted W. The Alert Level remained at III (Yellow; "changes in the behavior of volcanic activity").

Source: Washington Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Nevados de Chillán  | Chile  | 36.863°S, 71.377°W  | Elevation 3212 m

The Buenos Aires VAAC reported that on 21 July a webcam recorded an ash puff from Nevados de Chillán that rose to an altitude of 3 km (10,000 ft) a.s.l., and then continuous emissions of gas and minor amounts of ash that rapidly dissipated at crater level.

Source: Buenos Aires Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Poas  | Costa Rica  | 10.2°N, 84.233°W  | Elevation 2708 m

OVSICORI-UNA reported that a small phreatic eruption from the hot lake at Poás recorded at 0819 on 25 July ejected material 50 m above the crater lake’s surface.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)



Volcano index photo  Popocatepetl  | Mexico  | 19.023°N, 98.622°W  | Elevation 5426 m

During 20-26 July CENAPRED reported 26-182 daily emissions from Popocatépetl, some of which contained minor amounts of ash. Cloud cover often prevented observations, though gas-and-steam plumes were visible almost daily. Crater incandescence was visible on some nights. Explosions were detected during 24-26 July: 4 on 24 July, 4 on 25 July, and 1 on 26 July. The Alert Level remained at Yellow, Phase Two.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)



Volcano index photo  Sheveluch  | Central Kamchatka (Russia)  | 56.653°N, 161.36°E  | Elevation 3283 m

KVERT reported that during 15-22 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)



Volcano index photo  Sinabung  | Indonesia  | 3.17°N, 98.392°E  | Elevation 2460 m

Based on satellite and webcam images, model data, and ground reports from PVMBG, the Darwin VAAC reported that during 21-22 and 24-25 July ash plumes from Sinabung rose to altitudes of 3.7-4.6 km (12,000-15,000 ft) a.s.l. and drifted NW, NE, and SE.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Tengger Caldera  | Eastern Java (Indonesia)  | 7.942°S, 112.95°E  | Elevation 2329 m

Based on analyses of satellite images, the Darwin VAAC reported that during 23-24 July ash plumes from Tengger Caldera's Bromo cone rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted over 45 km NW and W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Turrialba  | Costa Rica  | 10.025°N, 83.767°W  | Elevation 3340 m

OVSICORI-UNA reported that an explosion at Turrialba recorded at 1309 on 22 July generated an ash plume that rose 800 m and drifted W. Increased tremor coincided with the event. Ash-and-gas emissions rose from the crater for approximately 15 minutes, starting at 1543. Ash emissions were recorded with the webcam at 0600 on 23 July. Tremor levels fluctuated though the day; periods of increased tremor likely corresponded to ash emissions. Visual observations of the crater were hindered by fog. Tremor amplitude increased at 1800 on 24 July. Two explosions, at 2123 and 2217, ejected hot rock fragments, gas, and ash 500 m above the crater; the gas-and-ash plume drifted SW. Gas-and-ash emissions passively rose from the crater through the next morning. At 0722 on 25 July an explosion generated an ash plumes that rose 3 km above the crater and drifted NW, W, and SW. At 0826 another explosion produced an ash plume that rose 1.5 km.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)



Weekly Reports Archive


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Dempo Kirishimayama Puyehue-Cordon Caulle Tungurahua
Descabezado Grande Kizimen Rabaul Turrialba
Dieng Volcanic Complex Klyuchevskoy Ranakah Ubinas
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 News Feeds and Google Placemarks




The RSS (Really Simple Syndication) feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website.




The CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management. They are similar in content to the RSS feed, but contain no active links.




A Google Earth network link for the Weekly Volcanic Activity Report can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 Criteria & Disclaimers


Criteria

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.


Disclaimers

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 monthly, and 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.

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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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RSS and CAP Feeds

An RSS (Really Simple Syndication) feed for the Weekly Volcanic Activity Report first made available on 5 March 2008 can be utilized with the aid of various free downloadable readers. The report content of the news feed is identical to the Weekly Volcanic Activity Report minus some features including the header information (latitude and longitude and summit elevation), the Geologic Summary, and a link to the volcano's page from the Global Volcanism Program. Each volcano report includes a link from the volcano's name back to the more complete information in the Weekly Volcanic Activity Report on the Smithsonian website. On 12 March 2009, GeoRSS tags were added so that the latitude and longitude for each volcano could be included with the feed.

At the end of each individual report is a list of the sources used. We would like to emphasize that the World Organization of Volcano Observatories (WOVO) website (http://www.wovo.org/) lists the regional volcano observatories that have the most authoritative data for many of these events.

CAP (Common Alerting Protocol) feeds are XML files specifically formatted for disaster management.


Google Earth Placemarks

A Google Earth network link for the Weekly Volcanic Activity Report was first made available on 1 April 2009. This file can be loaded into the free Google Earth software, and in turn will load placemarks for volcanoes in the current weekly report. Placemark balloons include the volcano name, report date, report text, sources, and links back to the GVP volcano page for that volcano and to the complete Weekly Report for that week.

 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)

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 Volcanológico 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

RSAM - Real-time Seismic Amplitude Measurement

RVO - Rabaul Volcano Observatory

SERNAGEOMIN - Servicio Nacional de Geología y Minería (Chile)

SIGMET - Significant Meteorological Information

SNET - Servicio Nacional de Estudios Territoriales (El Salvador)

SVERT - Sakhalin Volcanic Eruption Response Team (Kurile Islands)

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)