Activity for the week of 3 August-9 August 2016
Smithsonian / USGS Weekly Volcanic Activity Report
You are currently viewing Archived reports for the week of 3 August-9 August 2016.
You are currently viewing Archived reports for the week of 3 August-9 August 2016.
Activity for the week of 3 August-9 August 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.
|Chikurachki||Paramushir Island (Russia)||New|
|Chirpoi||Kuril Islands (Russia)||New|
|Kilauea||Hawaiian Islands (USA)||New|
|Alaid||Kuril Islands (Russia)||Ongoing|
|Bagana||Bougainville (Papua New Guinea)||Ongoing|
|Klyuchevskoy||Central Kamchatka (Russia)||Ongoing|
|Nevado del Ruiz||Colombia||Ongoing|
|Nevados de Chillan||Chile||Ongoing|
|Sheveluch||Central Kamchatka (Russia)||Ongoing|
Brava | Cape Verde | 14.85°N, 24.72°W | Elevation 900 m
According to the Universidade de Cabo Verde in a report posted on 4 August, Instituto Nacional da Meteorologia e Geofísica (INMG) recorded increased seismicity at Brava beginning at dawn on 2 August. In response authorities evacuated 300 people, based on a news report. Earthquakes were felt by residents during 3-4 August. Scientists and technicians from the Universidade de Cabo Verde (UniCV), Instituto Vulcanológico das Canárias (INVOLCAN), and Serviço Nacional da Protecção Civil (SNPC) began monitoring carbon dioxide emissions though found nothing unusual during 4-7 August.
Chikurachki | Paramushir Island (Russia) | 50.324°N, 155.461°E | Elevation 1781 m
KVERT reported that a moderate explosive eruption at Chikurachki was observed during 27-28 July. Ash plumes rose to altitudes of 4-5 km (13,100-16,400 ft) a.s.l. and drifted NE. Minor ashfall was reported in Severo-Kurilsk (Paramushir Island) on 27 July. After the heightened activity conditions remained quiet through 4 August. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Chirpoi | Kuril Islands (Russia) | 46.532°N, 150.871°E | Elevation 742 m
Gamalama | Halmahera (Indonesia) | 0.8°N, 127.33°E | Elevation 1715 m
Based on analyses of satellite imagery and model data, and information from PVMBG, the Darwin VAAC reported that during 3-4 August ash plumes from Gamalama rose to an altitude of 2.7 km (9,000 ft) a.s.l. and drifted S, SE, E, and NE. On 5 August PVMBG noted that seismicity continued to be elevated although inclement weather prevented visual observations.
Kilauea | Hawaiian Islands (USA) | 19.421°N, 155.287°W | Elevation 1222 m
During 3-9 August HVO reported that the lava lake continued to rise and fall, circulate, and spatter in Kilauea’s Overlook vent. Late on 6 August an explosions triggered by a rockfall into the lake ejected voluminous amounts of hot spatter and rock debris onto the SE rim of Halema’uma’u Crater, covering a broad swath 80 m long and 50 m wide around the formerly-closed public overlook area.
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 enter the ocean at Kamokuna in an area that spans 150-240 m wide. A small delta had formed at the entry. An active lobe of lava advanced along the W side of the flow field, crossed the Emergency Access road 500 m W of the main flow, and entered the ocean overnight during 8-9 August.
Aira | Kyushu (Japan) | 31.593°N, 130.657°E | Elevation 1117 m
JMA reported that on 4 August a small-scale explosion occurred at Minamidake summit crater (at Aira Caldera’s Sakurajima volcano) ejecting material as high as 400 m above the crater rim. The Alert Level remained at 3 (on a 5-level scale).
Alaid | Kuril Islands (Russia) | 50.861°N, 155.565°E | Elevation 2285 m
KVERT reported that moderate activity at Alaid’s summit crater was detected during 29 July-5 August. Satellite images showed a thermal anomaly at the volcano during 2-3 August. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
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 3-8 August ash plumes from Bagana rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted SW, WSW, W, and NW.
Dukono | Halmahera (Indonesia) | 1.693°N, 127.894°E | Elevation 1229 m
Based on ground reports from PVMBG, satellite data, and model data, the Darwin VAAC reported that during 3 and 6-9 August ash plumes from Dukono rose to altitudes of 1.8-3.3 km (6,000-11,000 ft) a.s.l. and drifted NW, N, E, and SE.
Etna | Sicily (Italy) | 37.748°N, 14.999°E | Elevation 3295 m
INGV reported that during mid-July weak ash emissions rose from a vent located high on the E flank of Etna’s New Southeast Crater (NSEC) cone. The emissions continued periodically until early August. Pulsating glow from mild, intra-crater explosions in the Voragine (VOR) crater was recorded during 7-9 August.
Klyuchevskoy | Central Kamchatka (Russia) | 56.056°N, 160.642°E | Elevation 4754 m
KVERT reported that a Strombolian eruption at Klyuchevskoy continued during 29 July-5 August. Volcanic bombs that were ejected 200-300 m above the summit crater and 50 m above a cinder cone 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 about 200 km NE, E, and NW during 31 July, 1 August, and 3-4 August. The Aviation Color Code remained at Orange.
Nevado del Ruiz | Colombia | 4.892°N, 75.324°W | Elevation 5279 m
Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that during 2-8 August seismicity at Nevado del Ruiz remained at similar levels as the week before. Significant amounts of water vapor and gas rose from the crater. A gas, steam, and ash plume rose 850 m above the crater rim and drifted NW and W on 6 August. The Alert Level remained at III (Yellow; the second lowest level on a four-color scale).
Nevados de Chillan | Chile | 36.868°S, 71.378°W | Elevation 3180 m
Servicio Nacional de Geología and Minería (SERNAGEOMIN) Observatorio Volcanológico de Los Andes del Sur (OVDAS) reported that the seismic stations monitoring Nevados de Chillán recorded an increase in seismic signals indicating explosions and increased emissions from new craters on the E side of Volcán Nuevo and the Volcán Arrau dome complex. During 1-9 August there were 11 explosions detected; the highest energy signal was recorded at 1656 on 8 August and was accompanied by an emission that rose 2 km. That same day the Buenos Aires VAAC reported that a gas-and-ash puff rose to an altitude of 4.2 km (14,000 ft) a.s.l. The Alert Level remained at Yellow, the middle level on a three-color scale, and the public was reminded not to approach the craters within a 3-km radius which had been extended due to the recent activity increase.
Pavlof | United States | 55.417°N, 161.894°W | Elevation 2493 m
AVO reported that since an ash-and-steam explosion at Pavlof on 27 July, activity had continued to decline. On 4 August AVO lowered the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory. During 5-9 August seismicity remained low but above background levels. Elevated surface temperatures were observed in one nighttime satellite image during 7-8 August.
Reventador | Ecuador | 0.077°S, 77.656°W | Elevation 3562 m
During 3-9 August IG reported a high level of seismic activity including explosions, long-period earthquakes, harmonic tremor, and signals indicating emissions at Reventador; cloud cover sometimes prevented visual observations. Incandescent blocks rolled as far as 1 km down the flanks. Gas, water vapor, and ash plumes rose from the crater during 3-4 and 6-7 August; the plumes rose as high as 1 km on 6 August.
Santa Maria | Guatemala | 14.757°N, 91.552°W | Elevation 3745 m
INSIVUMEH reported that on 8 August an 18-m-wide hot lahar triggered by rainfall descended the Cabello de Ángel drainage, a tributary of the Nimá I river drainage on the S flank of Santa María’s Santiaguito lava-dome complex, carrying tree trunks and blocks up to 1.5 cm in diameter. Explosions during 8-9 August produced ash plumes that rose as high as 1 km above the crater and drifted 15 km SW, W, and NW.
Sheveluch | Central Kamchatka (Russia) | 56.653°N, 161.36°E | Elevation 3283 m
KVERT reported that during 29 July-5 August 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.
Sinabung | Indonesia | 3.17°N, 98.392°E | Elevation 2460 m
Based on satellite images, model data, ground reports from PVMBG, and the Jakarta MWO, the Darwin VAAC reported that during 3-5 and 7 August ash plumes from Sinabung rose to altitudes of 3.7-5.5 km (12,000-18,000 ft) a.s.l. and drifted SE, NE, and NNW.
Yasur | Vanuatu | 19.532°S, 169.447°E | Elevation 361 m
On 2 August 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, within a 600-m-radius permanent exclusion zone, and that volcanic ash and gas could reach areas impacted by trade winds.
Weekly Reports Archive
|Ambang||Gaua||Maly Semyachik||Sarychev Peak|
|Anatahan||Great Sitkin||Manda Hararo||Semeru|
|Apoyeque||Guagua Pichincha||Maroa||Seulawah Agam|
|Axial Seamount||Hokkaido-Komagatake||Metis Shoal||Slamet|
|Azul, Cerro||Home Reef||Misti, El||Soputan|
|Balbi||Huila, Nevado del||Monowai||Soufriere Hills|
|Bamus||Hunga Tonga-Hunga Ha'apai||Montagu Island||Soufriere St. Vincent|
|Banda Api||Ibu||Moyorodake [Medvezhia]||South Sarigan Seamount|
|Barren Island||Iliamna||Myojinsho||St. Helens|
|Bezymianny||Inielika||Negra, Sierra||Sulu Range|
|Callaqui||Kadovar||NW Rota-1||Tair, Jebel at|
|Campi Flegrei Mar Sicilia||Kanaga||Nyiragongo||Talang|
|Chillan, Nevados de||Kavachi||Palena Volcanic Group||Tenerife|
|Concepcion||Kick 'em Jenny||Peuet Sague||Tolbachik|
|Descabezado Grande||Kolokol Group||Rabaul||Ulawun|
|Dieng Volcanic Complex||Korovin||Ranakah||Unknown Source|
|Epi||Kverkfjoll||Rincon de la Vieja||Witori|
|Erta Ale||Lamongan||Ritter Island||Yasur|
|Etorofu-Yakeyama [Grozny Group]||Lanin||Ruang||Zavodovski|
|Fernandina||Lengai, Ol Doinyo||Ruiz, Nevado del||Zubair Group|
|Fournaise, Piton de la||Lewotolo||Salak|
|Fourpeaked||Little Sitkin||San Cristobal|
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
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 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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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
CENAPRED - Centro Nacionale de Prevencion de Desastres (México)
COSPEC - Correlation Spectrometer
CVGHM (formerly VSI) - Center of Volcanology and Geological Hazard Mitigation
GMS - Geostationary Meteorological Satellite
GVO - Goma Volcano Observatory
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)
KEMSD - Kamchatkan Experimental and Methodical Seismilogical Department
M - magnitude
METEOSAT - Meteorological Satellite
MEVO - Mount Erebus Volcano Observatory
MWO - Meteorological Watch Office
NOTAM - Notice to Airmen
OVDAS - Observatorio Volcanologico de los Andes del Sur (Chile)
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)
UTC - Coordinated Universal Time
VAAC - Volcanic Ash Advisory Center
VAFTAD - Volcanic Ash Forecast Transport And Dispersion
VRC - Volcano Research Center (Japan)