Logo link to homepage

Smithsonian / USGS Weekly Volcanic Activity Report

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


















 Activity for the week of 10 July-16 July 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
Langila New Britain (Papua New Guinea) New

Karangetang Siau Island (Indonesia) Ongoing
Karymsky Eastern Kamchatka (Russia) Ongoing
Kilauea Hawaiian Islands (USA) Ongoing
Merapi Central Java (Indonesia) Ongoing
Popocatepetl Mexico Ongoing
Semeru Eastern Java (Indonesia) Ongoing
Sheveluch Central Kamchatka (Russia) Ongoing
Soufriere Hills Montserrat Ongoing
Tungurahua Ecuador Ongoing


New Activity / Unrest


Volcano index photo  Langila  | New Britain (Papua New Guinea)  | 5.525°S, 148.42°E  | Elevation 1330 m

Based on information from a pilot report, the Darwin VAAC reported that on 11 July at about 0900 an ash cloud from Langila was observed at a height of ~3.4 km. No ash was identifiable on satellite imagery.

Source: Darwin Volcanic Ash Advisory Centre (VAAC)



Ongoing Activity


Volcano index photo  Karangetang  | Siau Island (Indonesia)  | 2.781°N, 125.407°E  | Elevation 1797 m

During 1-7 July, low-level emissions continued from Karangetang's main crater and Crater II, and a red reflection was visible 25 m above the summit. In addition, seismicity decreased in comparison to the previous week. Karangetang remained at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



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

Activity at Karymsky during 5-12 July was similar to activity during the past several months. Seismicity was above background levels at Karymsky, with ~10 earthquakes per hour. The character of seismicity suggested that weak ash-and-gas explosions and gas blow-outs had probably occurred. On the 9th a flight crew observed a volcanic plume that rose to a height of ~3 km a.s.l. Thermal anomalies were visible on satellite imagery, but ash was not. Karymsky remained 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 July, surface lava flows were visible travelling down the Pulama pali scarp and Paliuli, the steep slope and cliff below Pulama pali and just above the coastal flat. Generally, seismicity was at normal levels, except for the continued swarm of long-period earthquakes and tremor that has been taking place since early June. The only significant deformation was recorded on the 9th when deflation began at Pu`u `O`o. It ended by the 13th.

Source: US Geological Survey Hawaiian Volcano Observatory (HVO)



Volcano index photo  Merapi  | Central Java (Indonesia)  | 7.54°S, 110.446°E  | Elevation 2910 m

During 1-7 July, observers noted 60 incandescent lava avalanches traveling predominately down Merapi's SW flank into the upstream portions of Sat, Lamat, Senowo, and Bebeng rivers. The avalanches reached a maximum run-out distance of ~2.6 km. On 2 July two pyroclastic flows traveled toward the upstream portion of Sat River, reaching a maximum run-out distance of 0.5 km. Merapi remained at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



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

During 8-15 July, there were small-to-moderate emissions of steam, gas, and ash at Popocatépetl. In addition, several episodes of low-amplitude harmonic tremor were recorded.

Source: Centro Nacional de Prevencion de Desastres (CENAPRED)



Volcano index photo  Semeru  | Eastern Java (Indonesia)  | 8.108°S, 112.922°E  | Elevation 3657 m

When weather conditions were clear during 1-7 July, lava avalanches were sometimes observed traveling 750 m from Semeru's crater rim E toward Besuk Kembar River. Seismicity decreased in comparison to the previous week. Semeru remained at Alert Level 2 (on a scale of 1-4).

Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)



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

During 5-12 July, seismicity generally continued to decline at Shiveluch, but remained above background levels. Earthquakes less than M 1.7 occurred at depths of 0-6 km accompanied by many local shallow seismic signals from possible avalanches or weak gas-and-ash explosions. During the report period the level of volcanic tremor increased; there was a tremor episode on the 9th from 0510 to 0540 in which the amplitude sharply increased to 10 times the previous level. Several short-lived explosions produced ash-and-gas plumes ~1-1.5 km above the lava dome. Some explosions were accompanied by rock avalanches and pyroclastic flows. Gas-and-steam plumes rose 0.2-1.5 km above the dome. Thermal anomalies were visible on satellite imagery, but ash was not. The Concern Color Code remained at Yellow ("volcano is restless").

Source: Kamchatkan Volcanic Eruption Response Team (KVERT)



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

Volcanic and seismic activity at Soufrière Hills were at low levels during 5-12 July. No change in lava-dome morphology occurred. The level of rockfall activity increased slightly between the 6th and 8th, before decreasing to very low levels for the remainder of the week. SO2 fluxes remained low, but increased slightly over the last 3 days of the report period.

Source: Montserrat Volcano Observatory (MVO)



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

Activity at Tungurahua during 9-14 July consisted of small-to-moderate emissions of steam, gas, and some ash, and periods of continuous tremor. During Strombolian activity on the 9th, incandescent volcanic bombs were hurled ~300 m into the air. A moderate explosion occurred on 12 July at 0517. Ash fell in the towns of Ambato, NW of Tungurahua, and Riobamba, to the SW.

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



Weekly Reports Archive

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





 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.

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations. (Last modified September 21, 1999.)

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL https://volcano.si.edu/reports_weekly.cfm
Contact: USGS Web Team
USGS Privacy Statement


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)