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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

You are currently viewing Archived reports for the week of 23 June-29 June 2004.


















 Activity for the week of 23 June-29 June 2004

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
Anatahan Mariana Islands (USA) Ongoing
Bezymianny Central Kamchatka (Russia) Ongoing
Colima Mexico Ongoing
Fuego Guatemala Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Nyiragongo DR Congo Ongoing
Santa Maria Guatemala Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Shishaldin Fox Islands (USA) Ongoing
Soufriere Hills Montserrat Ongoing
Tungurahua Ecuador Ongoing


Ongoing Activity


Volcano index photo  Anatahan  | Mariana Islands (USA)  | 16.35°N, 145.67°E  | Elevation 790 m

During 14-16 June, the level of seismicity was significantly lower at Anatahan than during the previous week. After the 16th, seismicity returned to the higher levels seen before the 14th and remained there through 28 June. On the 28th a tropical storm knocked out the last seismic station on Anatahan, prohibiting further monitoring until it is repaired.

Source: Emergency Management Office of the Commonwealth of the Mariana Islands and United States Geological Survey Volcano Hazards Program



Volcano index photo  Bezymianny  | Central Kamchatka (Russia)  | 55.972°N, 160.595°E  | Elevation 2882 m

An eruption at Bezymianny produced an ash cloud that during 18-19 June extended more than 1,000 km E and SE from the volcano and possible ash deposits extended 190 km SE from the lava dome. Seismicity at Bezymianny did not exceed background levels during 20-23 June. The Concern Color Code at Bezymianny was reduced from Orange to Yellow around 25 June.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

On 21 June low-level activity continued at Colima, with an average of three ash explosions occurring daily. The resultant ash plumes did not exceed heights of 2 km above the crater.

Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima



Volcano index photo  Fuego  | Guatemala  | 14.473°N, 90.88°W  | Elevation 3763 m

On 28 and 29 June, small explosions at Fuego produced plumes to ~0.8 km above the volcano that predominately drifted SW. Incandescence was visible in the crater at night.

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



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

Seismicity remained above background levels at Karymsky during 18-25 June, with 300-350 shallow earthquakes occurring per day. Based on interpretations of seismic data, possible ash-and-gas explosions rose daily to 2.5-4.5 km a.s.l. Pilots saw an ash plume on 17 June rise to ~2.5 km a.s.l. On 18 June, an ash plume extended ~40 km E. Karymsky remained at Concern Color Code 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 24-28 June, lava continued to flow down the Pulama Pali scarp, Paliuli, and into the sea. In addition, vents at Pu`u `O`o cone were incandescent. A few small earthquakes continued beneath Kilauea's summit, but no tremor was recorded. Tremor at Pu`u `O`o was at moderate-to-high levels. During the report period, small periods of inflation and deflation occurred.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Nyiragongo  | DR Congo  | 1.52°S, 29.25°E  | Elevation 3470 m

Satellite imagery showed that ash emissions from Nyiragongo that began on 4 June appeared to have ceased by 22 June.

Source: Toulouse Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Santa Maria  | Guatemala  | 14.757°N, 91.552°W  | Elevation 3745 m

Weak-to-moderate explosions occurred at Santa María's Santiaguito lava-dome complex during 25-29 June. Plumes rose to ~1 km above the crater and there were sporadic, weak avalanches of volcanic material. On 28 June at 0622, a partial lava-dome collapse sent material down the W side of Caliente cone for ~40 minutes.

Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC)



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

Seismicity was above background levels at Shiveluch during 18-25 June. Shallow earthquakes up to M 1.75 were recorded, along with nearly continuous spasmodic tremor. Gas plumes rose to ~4 km a.s.l. On 19 June, a likely ash cloud was seen 10-20 km S of the volcano. Shiveluch remained at Concern Color Code Orange.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



Volcano index photo  Shishaldin  | Fox Islands (USA)  | 54.756°N, 163.97°W  | Elevation 2857 m

Seismic unrest continued at Shishaldin during 18-25 June, with weak tremor and occasional discrete low-frequency earthquakes occurring. A pilot reported seeing steam rise to low levels above Shishaldin's cone. Around that time, a possible weak thermal anomaly was visible on satellite imagery. Shishaldin remained at Concern Color Code Yellow.

Sources: US Geological Survey Alaska Volcano Observatory (AVO), Anchorage Volcanic Ash Advisory Center (VAAC)



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

Activity at Soufrière Hills remained at low levels during 18-25 June. Most seismic activity occurred during 18-20 June, with extremely low seismicity during the remainder of the report period. The upper portions of the lava-dome complex within the crater were visible for the first time since 7 May 2004, revealing that parts of the dome had been lost. This explained the rockfall signals recorded during the previous weeks. Technical problems prevented measurements of the sulfur-dioxide flux.

Source: Montserrat Volcano Observatory (MVO)



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

At Tungurahua during 23-28 June, there were several emissions of steam, gas, and moderate amounts of ash. About 5-10 small-to-moderate explosions occurred daily. Plumes from eruptions rose to ~1.5 km above the crater. Seismicity was characterized by long-period earthquakes.

Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)



Weekly Reports Archive

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

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
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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) - 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)