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Smithsonian / USGS Weekly Volcanic Activity Report

Weekly Volcanic Activity Map

You are currently viewing Archived reports for the week of 10 April-16 April 2002.


















 Activity for the week of 10 April-16 April 2002

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
Etna Sicily (Italy) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Lokon-Empung Sulawesi (Indonesia) Ongoing
Popocatepetl Mexico Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Soufriere Hills Montserrat Ongoing
Tungurahua Ecuador Ongoing
Villarrica Chile Ongoing


Ongoing Activity


Volcano index photo  Etna  | Sicily (Italy)  | 37.748°N, 14.999°E  | Elevation 3320 m

Signs of unrest persisted at Etna during 6-14 April. On 13 April two earthquakes, with magnitudes 2.7-3, were felt by the local population. They occurred on the SE flank between the towns of Zafferana and Santa Venerina. During the report period, ash emissions were nearly continuous at Bocca Nuova crater, rising to several hundreds of meters. No incandescence was visible in the crater.

Source: Italy's Volcanoes



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

After about 6 days of instrument downtime, the seismic station near Karymsky began to operate again. As was the case before the seismic station malfunction, seismicity was above background levels at 10 earthquakes per hour. The character of the seismicity indicated that weak ash-and-gas explosions and avalanches possibly occurred. A four-pixel-large thermal anomaly was observed on AVHRR satellite imagery on 9 April , but no ash was detected. The volcano was at Concern Color Code Yellow ("volcano is restless").

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

During 10-15 April, observers saw small surface lava flows descending along the path of the lava-tube system that drains the rootless shield area. These flows were sometimes visible above and on the Pulama pali scarp. Activity occurred at the rootless shields, and lava was visible in parts of Pu`u `O`o crater. Generally, seismicity and tilt were at normal levels. Tremor at Pu`u `O`o was low-to-moderate and low-level tremor and a few small earthquakes occurred at Kilauea's caldera. Pu`u `O`o slowly inflated following relatively slow deflation during 13-14 April; otherwise, there were no signs of significant deformation.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Lokon-Empung  | Sulawesi (Indonesia)  | 1.358°N, 124.792°E  | Elevation 1580 m

VSI reported that an eruption occurred at Lokon-Empung's Tompaluan crater on 10 April at 1104. The dark plume rose about 1 km above the volcano and tephra fell around the crater. Based on a pilot report, the Darwin VAAC first erroneously attributed the ash cloud to an eruption from Mahawu. No ash was visible on satellite imagery.

Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Darwin Volcanic Ash Advisory Centre (VAAC)



Volcano index photo  Popocatepetl  | Mexico  | 19.023°N, 98.622°W  | Elevation 5393 m

During 10-15 April, Popocatépetl emitted small clouds of steam, gas, and generally minor amounts of ash. In addition, episodes of harmonic tremor were recorded.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)



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

During 29 March-5 April, gas-and-steam and ash-and-gas emissions occurred at Shiveluch and seismicity remained above background levels. A short-lived explosive eruption on 10 April at 0900 produced an ash-and-gas plume that rose 1 km above the volcano. Seismicity during the report period included earthquakes with magnitudes less than or equal to 2.1 at depths of 0-9 km, many local shallow seismic signals (from possible avalanches or weak gas-and-ash explosions), and episodes of weak intermittent volcanic tremor. Thermal anomalies were visible on AVHRR satellite imagery, but ash was not. Shiveluch remained at Concern Color Code Yellow.

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

During 5-12 April, volcanism slightly decreased at Soufrière Hills in comparison to the previous week. Lava-dome growth over the entire summit region produced rockfalls that traveled predominately to the SE, E, and NE. Several pyroclastic flows traveled E for ~2 km down the Tar River Valley, reaching the sea. At the beginning of the report week, ash from ongoing rockfalls and venting of the dome fell to the NW and N of Montserrat.

Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)



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

During 10-13 April, small emissions of gas, steam, and ash rose 500 m above Tungurahua. On the 11th a small amount of ash fell in the N-flank resort town of Baños.

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



Volcano index photo  Villarrica  | Chile  | 39.42°S, 71.93°W  | Elevation 2847 m

Observations of Villarrica on 9 April revealed that no incandescence or explosive noises occurred in the volcano's crater. A lava lake, whose surface was 200 m below the crater rim, was last seen at the volcano on 19 January. At that time explosions at Villarrica occurred every 5-10 minutes.

Source: Villarrica Volcano Visual Surveillance Project



Weekly Reports Archive

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