Activity for the week of 11 April-17 April 2018
- Info & Contacts
Activity for the week of 11 April-17 April 2018
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.
|Langila||New Britain (Papua New Guinea)||New|
|Bagana||Bougainville (Papua New Guinea)||Ongoing|
|Cleveland||Chuginadak Island (USA)||Ongoing|
|Ebeko||Paramushir Island (Russia)||Ongoing|
|Karymsky||Eastern Kamchatka (Russia)||Ongoing|
|Kilauea||Hawaiian Islands (USA)||Ongoing|
|Sheveluch||Central Kamchatka (Russia)||Ongoing|
Ambae | Vanuatu | 15.4°S, 167.83°E | Elevation 1496 m
Based on observations from satellites, webcams, pilots, and the Vanuatu Geohazards Observatory (local community reports), the Wellington VAAC reported that during 11-14 April ash plumes from the vent at Ambae’s Lake Voui rose to altitudes of 1.8-4.9 km (6,000-16,000 ft) a.s.l. and drifted N, NW, W, and SE. On 12 April news articles noted that ashfall had affected the N part of Ambae, with photos showing thick ashfall deposits on houses and agricultural land, and reports of contaminated water supplies. On 15 April a VAAC office reported that the eruption has ceased. The Alert Level remained at 3 (on a scale of 0-5).
Langila | New Britain (Papua New Guinea) | 5.525°S, 148.42°E | Elevation 1330 m
Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that on 15 April a discrete, low-level ash plume from Langila rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted S.
Sinabung | Indonesia | 3.17°N, 98.392°E | Elevation 2460 m
PVMBG reported that at 0640 on 12 April an event at Sinabung generated an ash plume that rose 200 m and drifted WNW. At 1655 pyroclastic flows generated ash plumes that drifted WSW. At 0827 on 15 April an event generated an ash plume rose 1 km and drifted WNW. The Alert Level remained at 4 (on a scale of 1-4), with a general exclusion zone of 3 km and extensions of 7 km on the SSE sector, 6 km in the ESE sector, and 4 km in the NNE sector.
Agung | Bali (Indonesia) | 8.343°S, 115.508°E | Elevation 2997 m
Based on webcam views, satellite data, and ground-based observations, the Darwin VAAC reported that on 11 April an event at Agung generated an ash plume that rose to an altitude of 3.7 km (12,000 ft) a.s.l. and drifted SW.
Aira | Kyushu (Japan) | 31.593°N, 130.657°E | Elevation 1117 m
JMA reported that there were four events and nine explosions at Minamidake crater (at Aira Caldera’s Sakurajima volcano) during 9-16 April. Tephra was ejected as far as 1.3 km from the crater, and plumes rose as high as 2.5 km above the crater rim. Crater incandescence was visible on most nights. The Alert Level remained at 3 (on a 5-level 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 14-15 April ash plumes from Bagana rose to altitudes of 2.1-2.4 km (7,000-8,000 ft) a.s.l. and drifted about 110 km SW.
Cleveland | Chuginadak Island (USA) | 52.825°N, 169.944°W | Elevation 1730 m
AVO reported that a small explosion at Cleveland was detected in seismic and infrasound data at 0759 on 13 April; no eruption plume was visible in satellite images. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Dukono | Halmahera (Indonesia) | 1.693°N, 127.894°E | Elevation 1229 m
Based on analyses of satellite imagery, wind model data, and notices from PVMBG, the Darwin VAAC reported that during 11-16 April ash plumes from Dukono rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted mainly NW, W, SW, and NNE.
Ebeko | Paramushir Island (Russia) | 50.686°N, 156.014°E | Elevation 1103 m
Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 7 and 11-12 April that sent ash plumes as high as 1.8 km (5,900 ft) a.s.l. Ashfall was reported in Severo-Kurilsk on 6 April. The Aviation Color Code remained at Orange (the second highest level on a four-color scale).
Fuego | Guatemala | 14.473°N, 90.88°W | Elevation 3763 m
INSIVUMEH reported that on 9 April a lahar descended the Seca (Santa Teresa) drainage on Fuego’s W flank. The lahar was 10 m wide, 1.5 m deep, and had a consistency similar to cement mix. During 12-13 April explosions generated ash plumes that rose as high as 1 km and drifted 15 km SW and W. Incandescent material was ejected as high as 300 m above the crater rim, and generated avalanches of material in the Seca, Cenizas (SSW), Las Lajas (SE), and Honda (E) ravines. Ash fell in areas downwind including in Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché (8 km SW), (SSW), Las Lajas (SE), and Honda (E) ravines. Ash fell in areas downwind including in Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché (8 km SW), El Porvenir (8 km ENE), and Finca Palo Verde.
Activity increased on 14 April and remained elevated through 17 April. Moderate-to-strong explosions were detected at a rate of 6-9 per hour, and sometimes produced shock waves that vibrated houses in Morelia and Panimaché. Dense ash plumes rose as high as 1.1 km and drifted 20 km W and S, though winds also carried the ash to higher altitudes to the SE. Incandescent material was ejected as high as 300 m above the crater rim, and generated avalanches of material in the crater area. Ashfall was reported in areas downwind including in Santa Sofía, Morelia, Panimaché I and II, El Porvenir, and Finca Palo Verde. The rate of explosions increased to 7-10 per hour on 16 April; explosions sometimes caused structures in Panimache, Morelia, La Reina, and Alotenango (8 km ENE) to vibrate. A lava flow traveled 1.3 km down the Seca drainage.
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
During 11-17 April HVO reported that the lava lake continued to rise, fall, and spatter in Kilauea’s Overlook crater. The lake level was high, with spattering visible from HVO and Jaggar Museum; by 16 April the lake level was 10 m below the rim of the Overlook crater. Surface lava flows were active above Pulama pali. On 11 April a moderate swarm of over 200 earthquakes occurred at depths of 7-9 km below the summit. The largest event was a M 2.4. Seismicity returned to background levels at 0230. Three minor ledge collapses were detected on 12 April, one at 1157 and two just after 1830. Surface lava flows were active above Pulama pali; on 13 April most scattered breakouts were within 2.2 km from Pu'u 'O'o Crater, and one was about 5 km away.
Mayon | Luzon (Philippines) | 13.257°N, 123.685°E | Elevation 2462 m
PHIVOLCS reported that during 11-17 April white steam plumes from Mayon drifted NW, WNW, WSW, and SW. Crater incandescence was visible at night. The sulfur dioxide flux was 2,800, 1,918, 1,621, and 1,617 tonnes/day on 11, 12, 13, and 16 April, respectively. The Alert Level remained at 2 (on a 0-5 scale) and PHIVOLCS reminded residents to stay away from the 6-km-radius Permanent Danger Zone and the 7-km Extended Danger Zone on the SSW and ENE flanks.
Sabancaya | Peru | 15.787°S, 71.857°W | Elevation 5960 m
Observatorio Vulcanológico del Sur del IGP (OVS-IGP) and Observatorio Vulcanológico del INGEMMET (OVI) reported that explosive activity at Sabancaya was similar to the previous week; explosions averaged 15 per day during 9-15 April. Seismicity was dominated by long-period events, with signals indicating emissions. Gas-and-ash plumes rose as high as 2.2 km above the crater rim and drifted 30 km NW and SW. Minor ashfall was reported in Huambo and Cabanaconde. The MIROVA system detected three thermal anomalies. The report noted that the public should not to approach the crater within a 12-km radius.
Sheveluch | Central Kamchatka (Russia) | 56.653°N, 161.36°E | Elevation 3283 m
Turrialba | Costa Rica | 10.025°N, 83.767°W | Elevation 3340 m
Weekly Reports Archive
|Ahyi||Fuego||Little Sitkin||San Miguel|
|Antuco||Great Sitkin||Manda Hararo||Semeru|
|Arenal||Guagua Pichincha||Maroa||Seulawah Agam|
|Azul, Cerro||Hokkaido-Komagatake||Metis Shoal||Slamet|
|Azumayama||Home Reef||Misti, El||Soputan|
|Bamus||Huila, Nevado del||Monowai||Soufriere Hills|
|Banda Api||Hunga Tonga-Hunga Ha'apai||Montagu Island||Soufriere St. Vincent|
|Bardarbunga||Ibu||Moyorodake [Medvezhia]||South Sarigan Seamount|
|Bogoslof||Inielika||Negra, Sierra||Sulu Range|
|Bristol Island||Iya||Nightingale Island||Sundoro|
|Cameroon||Kadovar||NW Rota-1||Tair, Jebel at|
|Campi Flegrei Mar Sicilia||Kambalny||Nyamuragira||Takawangha|
|Chiles-Cerro Negro||Kasatochi||Pagan||Tara, Batu|
|Chillan, Nevados de||Katla||Palena Volcanic Group||Telica|
|Copahue||Kick 'em Jenny||Pinatubo||Tolbachik|
|Dieng Volcanic Complex||Kolokol Group||Ranakah||Ulawun|
|Dukono||Korovin||Raoul Island||Unknown Source|
|Epi||Kusatsu-Shiranesan||Rincon de la Vieja||White Island|
|Erta Ale||Lamington||Ritter Island||Wolf|
|Etorofu-Yakeyama [Grozny Group]||Langila||Ruang||Zaozan|
|Fernandina||Lascar||Ruiz, Nevado del||Zhupanovsky|
|Fogo||Lengai, Ol Doinyo||Sabancaya||Zubair Group|
|Fournaise, Piton de la||Lewotobi||Salak|
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) - 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)