Activity for the week of 17 June-23 June 2015
- Info & Contacts
Activity for the week of 17 June-23 June 2015
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.
|Cleveland||Chuginadak Island (USA)||New|
|Karymsky||Eastern Kamchatka (Russia)||Ongoing|
|Kilauea||Hawaiian Islands (USA)||Ongoing|
|Manam||Papua New Guinea||Ongoing|
|Sheveluch||Central Kamchatka (Russia)||Ongoing|
|Shishaldin||Fox Islands (USA)||Ongoing|
|Zhupanovsky||Eastern Kamchatka (Russia)||Ongoing|
Bulusan | Luzon (Philippines) | 12.77°N, 124.05°E | Elevation 1565 m
PHIVOLCS reported that the seismic network at Bulusan recorded an explosion-type event that lasted for two minutes on 18 June; dense clouds obscured visual observations of the summit area. A phreatic explosion that occurred at 1455 on 19 June, and lasted for seven minutes, produced a 1.5-km-high grayish ash plume that drifted WSW. A low-level ash cloud on the upper NW flank, possibly from a short pyroclastic flow, was also observed. Minor amounts of ash fell in the neighborhoods of Bacolod, Buraburan, Mapili, Puting Sapa, and Juban. The event was followed by a voluminous gray white emission, which later turned completely white, that rose 250 m and drifted SW. At 1315 on 21 June an event which lasted 111 seconds generated a steam-and-ash plume that rose 150 m and drifted E. Trace amounts of ash fell in San Jose, San Francisco, Bulusan Proper, Sapngan, San Rafael, and Dapdap. The Alert Level remained at 1, indicating abnormal conditions and a 4-km radius Permanent Danger Zone (PDZ).
Cleveland | Chuginadak Island (USA) | 52.825°N, 169.944°W | Elevation 1730 m
On 19 June AVO reported renewed unrest at Cleveland the previous week, characterized by elevated surface temperatures detected in satellite images and a dusting of ash near the summit visible on 14 June. Minor steaming was visible in the webcam during the week. The consistently elevated temperatures suggested possible renewed growth of the small lava dome in the summit crater. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.
Concepcion | Nicaragua | 11.538°N, 85.622°W | Elevation 1700 m
INETER reported that gas explosions continued to be detected at Concepción; by 23 June a total of 2,304 explosions, 320 since 15 June, had been detected by the network since activity increased (date not specified).
Sinabung | Indonesia | 3.17°N, 98.392°E | Elevation 2460 m
BNPB reported that activity at Sinabung remained high. On 17 June there were 120 avalanches, four pyroclastic flows that traveled 2-3 km ESE and S, and lava was incandescent as far as 2 km S and SE. On 18 June a pyroclastic flow traveled 2.5 km SE and incandescent lava as far as 1.5 km SE was observed. Based on ground observations, the Washington VAAC reported that an ash plume rose to an altitude of 4.3 km (14,000 ft) a.s.l. and drifted SE during 18-22 June. On 23 June BNPB noted that 10,184 people (3,030 families) were displaced, housed in 10 different shelters. The Alert Level remained at 4 (on a scale of 1-4).
Aira | Kyushu (Japan) | 31.593°N, 130.657°E | Elevation 1117 m
JMA reported 15 explosions during 15-22 June from Showa Crater at Aira Caldera’s Sakurajima volcano, some that ejected tephra as far as 800 m, and incandescence from the crater that was occasionally visible at night. The Alert Level remained at 3 (on a 5-level scale).
Colima | Mexico | 19.514°N, 103.62°W | Elevation 3850 m
Based on webcam views, the Washington VAAC reported an explosion at Colima on 18 June that ejected lava onto the flanks and possibly produced an ash emission. Ash emissions were visible in the webcam later that day. On 21 June satellite images showed a diffuse ash plume drifting WNW, and Colima Tower reported ash to altitudes of 4.6-6.1 km (15,000-20,000 ft) a.s.l.
Grimsvotn | Iceland | 64.42°N, 17.33°W | Elevation 1725 m
According to the Icelandic Meteorological Office, the water level of the Skaftá river at Sveinstindur and electrical conductivity both rose during 16-17 June, indicating a glacial outburst flood (jokulhlaup), originating from Grímsvötn's western Skaftá ice cauldron. The jokulhlaup was unconfirmed without visual observations, however. The report warned that hydrogen sulfide released from the floodwater as it drains is particularly potent at the river outlet at the ice margin, where concentrations may reach poisonous levels. The cauldrons drain an average every two years, producing floods of up to 1,500 cubic meters per second.
Source: Icelandic Met Office
Karymsky | Eastern Kamchatka (Russia) | 54.049°N, 159.443°E | Elevation 1513 m
Kilauea | Hawaiian Islands (USA) | 19.421°N, 155.287°W | Elevation 1222 m
HVO reported that seismicity beneath Kilauea's summit, upper East Rift Zone, and Southwest Rift Zone was at background levels during 17-23 June. The lava lake continued to be active in the deep pit within the Overlook vent, exhibiting vigorous spattering. The June 27th NE-trending lava flow continued to be active with surface flows within 8 km NE of Pu'u 'O'o. A small-scale lava flow spilled onto the Pu'u 'O'o crater floor from a vent on the N side of the floor at 0130 on 19 June.
Lokon-Empung | Sulawesi (Indonesia) | 1.358°N, 124.792°E | Elevation 1580 m
PVMBG reported that during 10-17 June observers at the Lokon Observation Post in Kakaskasen Tomohon, North Sulawesi (4 km from the crater) reported that although inclement weather sometimes obscured views of Lokon-Empung's Tompaluan Crater, white plumes were observed rising as high as 450 m above the crater. The number of volcanic earthquakes fluctuated and signals indicating emissions were detected almost daily. The Alert Level remained at 3 (on a scale of 1-4). Residents and tourists were reminded not to approach Tompaluan Crater within a radius of 2.5 km.
Manam | Papua New Guinea | 4.08°S, 145.037°E | Elevation 1807 m
Based on observations of satellite imagery and wind data analyses, the Darwin VAAC reported that during 21-23 June ash plumes from Manam drifted over 35 km N and NW at an altitude of 3 km (10,000 ft) a.s.l.
Pacaya | Guatemala | 14.381°N, 90.601°W | Elevation 2552 m
INSIVUMEH reported a gradual increase of tremor amplitude at Pacaya during 17-18 June. Observers noted that small ash ejections from Mackenney cone were dispersed around the crater. Tremor continued to be detected during 20-22 June. Ash emissions continued to be confined to the crater area during 21-22 June, and incandescence from the crater was visible at night.
Sheveluch | Central Kamchatka (Russia) | 56.653°N, 161.36°E | Elevation 3283 m
KVERT reported that during 12-19 June lava-dome extrusion onto Sheveluch’s N flank was accompanied by fumarolic activity. Satellite images showed an ash plume drifting W at an altitude of 5 km (16,400 ft ) a.s.l. on 15 June, and a thermal anomaly over the volcano during 15-17 June. The Aviation Color Code remained at Orange.
Shishaldin | Fox Islands (USA) | 54.756°N, 163.97°W | Elevation 2857 m
AVO reported that seismicity at Shishaldin continued to be elevated over background levels 17-23 June, indicating that low-level eruptive activity confined to the summit crater likely continued. Elevated surface temperatures were periodically detected in satellite images, and minor steaming was recorded by the webcam. On 18 June pilot and satellite observations indicated a weak ash plume rising around 100 m above the summit crater, resulting in ash deposits on the upper flanks. Weak ash emissions were also visible with the webcam the next day. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Soputan | Sulawesi (Indonesia) | 1.108°N, 124.73°E | Elevation 1784 m
PVMBG reported that during 10-17 June white plumes were observed rising as high as 500 m above Soputan even though inclement weather sometimes obscured crater views. Variable seismicity was dominated by volcanic earthquakes and signals indicating emissions and avalanches. Low-frequency harmonic tremor was occasionally detected. The Alert Level remained at 3 (on a scale of 1-4). Residents and tourists were advised not to approach the craters within a radius of 4 km, or 6.5 km on the WSW flank.
Ubinas | Peru | 16.355°S, 70.903°W | Elevation 5672 m
Instituto Geofísico del Perú (IGP) Observatorio Volcanológico del Sur (OVS) reported that during 17-22 June the occurrence of long-period earthquakes slightly increased to an average of 110 events/day from 62 events/day the previous week. Volcano-tectonic events continued to occur at a high rate. Harmonic tremor and hybrid events were also detected. Ash-and-gas emissions rose as high as 2 km above the crater base and drifted in multiple directions; 12 emissions were counted, eight of them on 22 June.
Zhupanovsky | Eastern Kamchatka (Russia) | 53.589°N, 159.15°E | Elevation 2899 m
KVERT reported that explosive activity at Zhupanovsky continued during 12-19 June. Weak steam-and-gas activity was observed on 14 June. Satellite images showed a thermal anomaly over the volcano on 16 June, as well as an ash cloud drifting 150 km W. The Aviation Color Code remained at Orange.
Weekly Reports Archive
|Akan||Galeras||Little Sitkin||San Cristobal|
|Antuco||Great Sitkin||Makian||Santa Maria|
|Apoyeque||Guagua Pichincha||Manam||Sarychev Peak|
|Axial Seamount||Hokkaido-Komagatake||McDonald Islands||Sinarka|
|Azul, Cerro||Home Reef||Melimoyu||Siple|
|Bagana||Hudson, Cerro||Metis Shoal||Slamet|
|Balbi||Huila, Nevado del||Michael||Soputan|
|Bamus||Hunga Tonga-Hunga Ha'apai||Misti, El||Sorikmarapi|
|Barren Island||Ijen||Monowai Seamount||Soufrière Hills|
|Batur||Iliamna||Montagu Island||Soufrière St. Vincent|
|Callaqui||Ioto||Negra, Sierra||Sulu Range|
|Campi Flegrei Mar Sicilia||Jackson Segment||Nightingale Island||Sundoro|
|Chaiten||Kanlaon||NW Rota-1||Tair, Jebel at|
|Chiginagak||Karangetang [Api Siau]||Nyamuragira||Talang|
|Chillán, Nevados de||Karymsky||Ontakesan||Tandikat-Singgalang|
|Cleveland||Katmai||Palena Volcanic Group||Telica|
|Dempo||Kick 'em Jenny||Pinatubo||Tolbachik|
|Dieng Volcanic Complex||Kilauea||Poas||Tongariro|
|Erta Ale||Krummel-Garbuna-Welcker Volcanic Complex||Redoubt||West Mata|
|Etorofu-Yakeyama [Grozny Group]||Kusatsu-Shiranesan||Rincon de la Vieja||Witori|
|Fournaise, Piton de la||Lascar||Ruapehu||Zubair Group|
|Fourpeaked||Lengai, Ol Doinyo||Ruiz, Nevado del|
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.
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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)
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)
M - magnitude
METEOSAT - Meteorological Satellite
MWO - Meteorological Watch Office
NOTAM - Notice to Airmen
OVSICORI-UNA - Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (Costa Rica)
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)
UTC - Coordinated Universal Time
VAAC - Volcanic Ash Advisory Center
VRC - Volcano Research Center (Japan)