Activity for the week of 8 January-14 January 2003
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.
New Activity / Unrest
| 14.473°N, 90.88°W
| Elevation 3763 m
The Washington VAAC reported that an eruption began at Fuego on 8 January around 0500. According to INSIVUMEH, as of 1100 that day the eruption continued with ash explosions and lava flow emission. A steam-and-ash column rose 5.7 km a.s.l. and drifted to the W. In addition, two small-to-moderate pyroclastic flows traveled down the drainage of the Santa Teresa River Valley. CONRED stated that the Alert Level was raised to Orange and several people were evacuated from the town of Sangre de Cristo. According to a news report volcanism decreased the following day, so the Alert Level was lowered from Orange to Yellow.
Sources: Coordinadora Nacional para la Reducción de Desastres (CONRED), Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Washington Volcanic Ash Advisory Center (VAAC), EFE News Service, Prensa Libre
| Central Kamchatka (Russia)
| 56.056°N, 160.642°E
| Elevation 4754 m
Seismicity was slightly above background levels at Kliuchevskoi during 6-9 January, with 10-23 earthquakes recorded per day. Steam-and-gas plumes were seen rising to 1 km above the crater. Thermal anomalies were visible on satellite imagery. A probable mudflow, seen on the volcano's SE slope on 7 January, may have emerged after a short explosion to the SE or E, or after powerfulfumarolic activity in the crater. The Concern Color Code was reduced from Orange to Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 36.586°N, 27.16°E
| Elevation 698 m
According to a news article, the crater of Nisyros was declared off limits to visitors, due to increasing temperatures and growing surface cracks. Evangelos Layios, the director of Athens University's geophysics laboratory, stated, ". . . earthquakes in 1995-96 triggered changes in the general condition of the volcano. For example, the hydrothermal system has increased in [temperature] from 210 to 315 degrees Celsius, there is continuous microseismic activity as well as changes on the surface of the ground." The ban on visitors was prompted by a crack on the volcano that almost tripled in length over the past year to 139 m.
Source: Kathimerini News
| Costa Rica
| 10.463°N, 84.703°W
| Elevation 1670 m
During December activity at Arenal consisted of continuous gas emissions, lava flows towards the W flank, and sporadic Strombolian eruptions. In addition, fumarolic activity occurred at Crater D.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
| 19.514°N, 103.62°W
| Elevation 3850 m
Universidad de Colima reported that on 13 January volcanism was at relatively low levels at Colima. Lava slowly flowed to the W and SW. Landslides from lava-flow fronts traveled 800-1,200 m W and SW. Incandescence was visible at the volcano's summit during the evenings. Seismicity associated with the landslides was recorded, although the number and size of the landslides diminished in comparison to the previous month. Deflation was recorded at the volcano. The 6.5-km-radius exclusion zone around Colima remained in effect, with other restrictions to access extending 11.5 km from the volcano's summit.
Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima
| Sicily (Italy)
| 37.748°N, 14.999°E
| Elevation 3320 m
According to the Etna Volcan Sicilien website, a reduction in explosive activity at the 2,750-m pyroclastic cone on the upper S flank of the volcano occurred for about a week until 10 January. On the 10th explosions occurred every few seconds, sending volcanic material several meters high that fell within the cone. Lava flows from the cone traveled towards the S.
Sources: Etna Volcan Sicilien (Charles Rivière), Italy's Volcanoes, Toulouse Volcanic Ash Advisory Centre (VAAC)
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 8-13 January at Kilauea, lava continued to flow into the sea at the West Highcastle entry. Surface lava flows were visible on the coastal flat and upslope of it on Paliuli. Generally, seismicity was at background levels at Kilauea. The long-lasting swarm of long-period earthquakes and tremor at Kilauea's summit, which began last June, continued at low-to-moderate levels. No significant deformation was recorded.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| 0.077°S, 77.656°W
| Elevation 3562 m
During 10-14 January, volcanic and seismic activity were relatively low at Reventador. On the 10th several lahars traveled down the Marquer and Reventador rivers. Lava flows continued to slowly advance and steam plumes were seen rising above the volcano.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
| Eastern Java (Indonesia)
| 8.108°S, 112.922°E
| Elevation 3657 m
Relatively high volcanic and seismic activity continued at Semeru during 1-12 January. Several explosions sent ash columns to 700 m above the crater. Lava avalanches sent material up to 750 m from the crater rim and a pyroclastic flow traveled 1.5 km E to the Besuk Kembar River. Semeru remained at Alert Level 2 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
During 3-10 January, seismicity remained above background levels at Shiveluch. Seismic data indicated that 11 ash-and-gas explosions reached heights of 1.5 km above the lava dome, and hot avalanches possibly occurred. Short-lived explosions produced ash-and-gas clouds to 1.5 km above the lava dome. On 9 January a small, hot avalance was seen on the SW slope of the lava dome. Thermal anomalies were visible on satellite imagery. Shiveluch remained at Concern Color Code Yellow.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 16.72°N, 62.18°W
| Elevation 915 m
Activity at Soufrière Hills during 3-10 January remained at high levels. The active extruded lobe on the lava dome continued to grow mainly towards the NNE, although some growth also occurred on the N side of the summit region. Rockfalls and small-to-moderate pyroclastic flows spilled off of the active lobe mostly into White's Ghaut and to a lesser extent into Tuitt's Ghaut and the Tar River Valley. Pyroclastic flows and rockfalls also spilled off the domes's N and NW flanks onto Farrell's Plain and into Tyre's Ghaut. During the report week, the Washington VAAC stated that several low-level ash plumes were visible on satellite imagery.
Sources: Montserrat Volcano Observatory (MVO), Washington Volcanic Ash Advisory Center (VAAC)
| 1.467°S, 78.442°W
| Elevation 5023 m
Volcanic activity remained at relatively low levels at Tungurahua during 8-13 January. Incandescence was visible in the crater at night. Seismicity was characterized by sporadic long-period earthquakes and low-intensity emissions.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
| United States
| 56.17°N, 159.38°W
| Elevation 2507 m
The elevated seismicity that began in mid-December 2002 at Veniaminof continued during 3-10 January. Nearly constant periods of seismicity were recorded during the report week. Discrete seismic events occurred at rates up to 1-2 events per minute, along with moderate levels of volcanic tremor. The Concern Color Code remained at Yellow.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
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.
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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.
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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.