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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

You are currently viewing Archived reports for the week of 30 June-6 July 2010.


















 Activity for the week of 30 June-6 July 2010

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
Chachadake [Tiatia] Kunashir Island (Japan/Russia) New
Ebeko Paramushir Island (Russia) New
Gorely Southern Kamchatka (Russia) New
Ulawun New Britain (Papua New Guinea) New

Aira Kyushu (Japan) Ongoing
Arenal Costa Rica Ongoing
Bagana Bougainville (Papua New Guinea) Ongoing
Dukono Halmahera (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Klyuchevskoy Central Kamchatka (Russia) Ongoing
Miyakejima Japan Ongoing
Pagan Mariana Islands (USA) Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Soufriere Hills Montserrat Ongoing
Tungurahua Ecuador Ongoing


New Activity / Unrest


Volcano index photo  Chachadake [Tiatia]  | Kunashir Island (Japan/Russia)  | 44.353°N, 146.252°E  | Elevation 1822 m

SVERT reported that a thermal anomaly from Tiatia volcano was detected by satellite on 25 June.

Source: Sakhalin Volcanic Eruption Response Team (SVERT)



Volcano index photo  Ebeko  | Paramushir Island (Russia)  | 50.686°N, 156.014°E  | Elevation 1103 m

KVERT reported that, according to observers in Severo-Kurilsk about 7 km E, activity from Ebeko increased on 2 July. Explosions produced ash plumes that rose to an altitude of 1.8 km (5,900 ft) a.s.l. and drifted SSE. The Level of Aviation Color Code was raised to Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Gorely  | Southern Kamchatka (Russia)  | 52.559°N, 158.03°E  | Elevation 1799 m

KVERT reported that during 24 June-2 July seismic activity from Gorely was above background levels, further increasing on 28 and 29 June. Analysis of satellite imagery showed a thermal anomaly over Gorely during 24-28 June; cloud cover prevented observations on other days. A gas-and-steam plume drifted 35 km S on 28 June. The Level of Aviation Color Code was raised to Yellow.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Ulawun  | New Britain (Papua New Guinea)  | 5.05°S, 151.33°E  | Elevation 2334 m

Based on analyses of satellite imagery, the Darwin VAAC reported that during 1 and 2-5 July ash plumes from Ulawun drifted 55-195 km at an altitude of 3 km (10,000 ft) a.s.l.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Ongoing Activity


Volcano index photo  Aira  | Kyushu (Japan)  | 31.593°N, 130.657°E  | Elevation 1117 m

Based on information from JMA, the Tokyo VAAC reported that during 30 June-1 July and 4-6 July explosions from Sakura-jima sometimes produced plumes. Those plumes, along with ash plumes occasionally seen by pilots, rose to altitudes of 1.5-4.6 km (5,000-15,000 ft) a.s.l. and drifted E and SE.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Arenal  | Costa Rica  | 10.463°N, 84.703°W  | Elevation 1670 m

OVSICORI-UNA reported that during June activity originating from Arenal's Crater C consisted of gas emissions, sporadic Strombolian eruptions, and occasional avalanches. Some of the Strombolian eruptions caused glass to vibrate in buildings located 4 km N. A lava flow that began in mid-January remained active on the S flank. Avalanches from edges of the lava flow and from the N and NE crater rim descended multiple flanks. Acid rain and small amounts of ejected pyroclastic material affected the NE, E, and SE flanks. Small explosions of gas and occasionally ash originated from a vent N of Crater C, while Crater D produced only fumarolic activity.

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



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

Based on analyses of satellite imagery, the Darwin VAAC reported that an ash plume from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. on 4 July and drifted 75 km W.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



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

Based on analyses of satellite imagery, the Darwin VAAC reported that during 30 June-2 July and on 6 July ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 90-225 km W and NW.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Karymsky  | Eastern Kamchatka (Russia)  | 54.049°N, 159.443°E  | Elevation 1513 m

KVERT reported that during 25 June-2 July seismic activity from Karymsky was above background levels and suggested that possible ash plumes rose to an altitude of 7 km (23,000 ft) a.s.l. A strong thermal anomaly was detected in satellite imagery on 27 June; cloud cover prevented views of the volcano on other days. The Aviation Color Code level remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

During 30 June-6 July HVO reported that activity at Kilauea continued from the summit and the east rift zone. At the summit, the level of a lava-pool surface in the deep pit inset within the floor of Halema'uma'u crater remained mostly stable; glow from the vent was also visible at night. A plume from the vent mainly drifted SW, dropping small amounts of tephra, and occasionally fresh spatter, downwind.

At the east rift zone, lava flows that broke out of the TEB lava-tube system built up a number of rootless shields between 580 and 395 m elevation. Thermal anomalies detected in satellite images and visual observations showed that minor lava flows originating from the shields traveled as far down as 365 m elevation on 1 July. A gas vent on the E wall of Pu'u 'O'o crater was incandescent during most of the reporting period.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



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

KVERT reported that during 25 June-2 July seismic activity from Kliuchevskoi was above background levels and Strombolian activity was observed on 24 and 29 June. Ash plumes occasionally rose to an altitude of 5.3 km (17,400 ft) a.s.l. Satellite imagery analysis revealed a large daily thermal anomaly from the volcano and an ash plume that drifted 32 km S on 1 July. The Aviation Color Code level remained at Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Miyakejima  | Japan  | 34.094°N, 139.526°E  | Elevation 775 m

Based on information from JMA, the Tokyo VAAC reported a possible eruption from Miyake-jima on 4 July. Details of possible resulting plumes were unreported.

Source: Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Pagan  | Mariana Islands (USA)  | 18.13°N, 145.8°E  | Elevation 570 m

Minor gas-and-steam plumes from Pagan continued to be observed in satellite imagery during breaks in cloud cover from 25 June to 2 July. The Washington VAAC reported that on 5 July a small cloud of ash mixed with a gas plume was observed in satellite imagery. The Aviation Color Code remained at Yellow and the Volcano Alert Level remained at Advisory.

Sources: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program, Washington Volcanic Ash Advisory Center (VAAC)



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

KVERT reported that during 24 June-2 July seismic activity from Shiveluch was above background levels and suggested that possible ash plumes occasionally rose to an altitude of 6.6 km (21,600 ft) a.s.l. On 24 and 29 June ash plumes from hot avalanches rose to an altitude of 4.5 km (14,800 ft) a.s.l. Strong fumarolic activity was also noted on these days. On 1 July, seismicity increased and may have indicated ash plumes rose to an altitude of 8 km (26,200 ft) a.s.l. Ashfall was reported in Klyuchi village, 50 km SW. Satellite imagery showed a large daily thermal anomaly over the lava dome. Based on analysis of satellite imagery and information from Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 3 July an ash plume rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted N. Satellite imagery showed a possible eruption the next day. The Aviation Color Code level remained at Orange.

Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)



Volcano index photo  Soufriere Hills  | Montserrat  | 16.72°N, 62.18°W  | Elevation 915 m

On 28 June, MVO reported that for the first time since February 2010 ash venting from the Soufrière Hills lava dome was observed and caused light ashfall in several areas across Montserrat. Ash venting began on 25 June and was coincident with small swarms of volcano-tectonic earthquakes on 23 and 25 June, although with no other discernable associated seismicity. Observations initially from MVO staff and during a later overflight indicated that the ash venting occurred from inside the collapse scar (near the N rim of English's crater) and from the S part of the summit crater that had formed on 11 February. On the nights of 25 and 26 June audible roaring was heard from several locations on the island. Ash venting diminished on 28 June. The Hazard Level remained at 3.

Source: Montserrat Volcano Observatory (MVO)



Volcano index photo  Tungurahua  | Ecuador  | 1.467°S, 78.442°W  | Elevation 5023 m

Observations of Tungurahua's summit area during 30 June-6 July were mostly not possible due to inclement weather. On 2 July, gas plumes were seen drifting WSW during breaks in the cloud cover. Ashfall was reported in areas 8-9 km W and SW, and as far away as 40 km WSW in San Juan. Incandescence from the crater was seen at night and slight roaring was heard. Ashfall was again reported in areas 8-9 km W and SW during 3-4 July. Steam-and-ash plumes were seen on 5 July and rose to an altitude of 7 km (23,000 ft) a.s.l. Ash fell in areas 8 km to the SW. Steam-and-ash plumes were again seen on 6 July; ashfall was reported in areas 8 km W, NW, and N.

Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)



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Agung Colo Hunga Tonga-Hunga Ha'apai Lewotobi Papandayan Sotara
Ahyi Concepcion Ibu Lewotolo Parker Soufriere Hills
Aira Copahue Ijen Little Sitkin Pavlof Soufriere St. Vincent
Akan Cotopaxi Iliamna Llaima Peuet Sague South Sarigan Seamount
Alaid Cuicocha Iliwerung Loihi Pinatubo Spurr
Alu-Dalafilla Cumbal Inielika Lokon-Empung Planchon-Peteroa St. Helens
Ambae Dabbahu Ioto Lopevi Poas Stromboli
Ambang Dempo Irazu Machin Popocatepetl Sulu Range
Ambrym Descabezado Grande Iya Makian Puyehue-Cordon Caulle Sumbing
Anatahan Dieng Volcanic Complex Izu-Torishima Makushin Rabaul Sundoro
Antillanca Volcanic Complex Dukono Jackson Segment Maly Semyachik Raikoke Suretamatai
Antuco Ebeko Kaba Manam Ranakah Suwanosejima
Apoyeque Ebulobo Kadovar Manda Hararo Raoul Island Taal
Arenal Egon Kambalny Marapi Rasshua Tair, Jebel at
Asamayama Ekarma Kanaga Maroa Raung Takawangha
Askja Epi Kanlaon Martin Redoubt Talang
Asosan Erebus Karangetang Masaya Reventador Tambora
Augustine Erta Ale Karkar Maule, Laguna del Reykjanes Tanaga
Avachinsky Etna Karthala Mauna Loa Rincon de la Vieja Tandikat-Singgalang
Awu Etorofu-Yakeyama [Grozny Group] Karymsky Mayon Rinjani Tangkoko-Duasudara
Axial Seamount Eyjafjallajokull Kasatochi McDonald Islands Ritter Island Tangkuban Parahu
Azul, Cerro Fernandina Katla Melimoyu Rotorua Tara, Batu
Azumayama Fogo Kavachi Merapi Ruang Telica
Bagana Fonualei Kelimutu Midagahara Ruapehu Tenerife
Balbi Fournaise, Piton de la Kelut Misti, El Ruiz, Nevado del Tengger Caldera
Bamus Fourpeaked Kerinci Miyakejima Sabancaya Three Sisters
Banda Api Fuego Ketoi Momotombo Sakar Tinakula
Bardarbunga Fujisan Kharimkotan Monowai Salak Tofua
Barren Island Fukutoku-Oka-no-Ba Kick 'em Jenny Montagu Island San Cristobal Tokachidake
Batur Galeras Kikai Moyorodake [Medvezhia] San Miguel Tolbachik
Bezymianny Galunggung Kilauea Mutnovsky San Vicente Toliman
Bogoslof Gamalama Kirishimayama Myojinsho Sangay Tongariro
Brava Gamkonora Kizimen Nabro Sangeang Api Tungurahua
Bristol Island Gaua Klyuchevskoy Negra, Sierra Santa Ana Turrialba
Bulusan Gorely Kolokol Group Negro, Cerro Santa Maria Ubinas
Calbuco Great Sitkin Korovin Nightingale Island Sarigan Ulawun
Callaqui Grimsvotn Koryaksky Nishinoshima Sarychev Peak Unnamed
Cameroon Guagua Pichincha Krakatau Nisyros Saunders Unnamed
Campi Flegrei del Mar di Sicilia Guallatiri Krummel-Garbuna-Welcker Novarupta Semeru Veniaminof
Cayambe Guntur Kuchinoerabujima NW Rota-1 Semisopochnoi Villarrica
Cereme Hachijojima Kurikomayama Nyamuragira Seulawah Agam West Mata
Chachadake [Tiatia] Hakoneyama Kusatsu-Shiranesan Nyiragongo Sheveluch Whakaari/White Island
Chaiten Heard Kverkfjoll Okataina Shishaldin Witori
Chiginagak Hekla Lamington Okmok Simbo Wolf
Chikurachki Hierro Lamongan Ontakesan Sinabung Yasur
Chiles-Cerro Negro Hokkaido-Komagatake Langila Oraefajokull Sinarka Zaozan [Zaosan]
Chillan, Nevados de Home Reef Lanin Osorno Siple Zavodovski
Chirinkotan Hood Lascar Pacaya Sirung Zhupanovsky
Chirpoi Huaynaputina Lateiki Pagan Slamet Zubair Group
Cleveland Hudson, Cerro Lengai, Ol Doinyo Paluweh Soputan
Colima Huila, Nevado del Leroboleng Panarea Sorikmarapi
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 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.

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.

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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)