Activity for the week of 13 February-19 February 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.
| 19.514°N, 103.62°W
| Elevation 3850 m
During 13-18 February, seismicity was relatively low at Colima and was dominated by landslide signals. In addition, landslides continued to travel down the volcano's S, SW, and W flanks, extending up to 2-3 km from the volcano's summit. During reconnaissance flights over the volcano, lava flows were observed extending ~70 m down the SW flank. On 16 February lava was seen on the E flank; CENAPRED reported that landslides are expected to travel down this flank in the following days. The 6.5-km-radius exclusion zone remained in effect and there were restrictions to access within a radius of 11.5 km from the volcano's summit.
Source: Centro Universitario de Estudios e Investigaciones de Vulcanologia - Universidad de Colima
| 14.473°N, 90.88°W
| Elevation 3763 m
Volcanism increased at Fuego on 12 February, with a ~2-km-long lava flow streaming down its flank towards an unpopulated area. Several shelters have been set up in case lava flows travel towards populated areas or volcanism increases. The volcano remained at Alert Level Yellow.
Source: UN Office for the Coordination of Humanitarian Affairs (OCHA)
| Siau Island (Indonesia)
| 2.781°N, 125.407°E
| Elevation 1797 m
An explosion at Karangetang on 11 February produced an ash cloud and lava flows. The ash cloud drifted to the WSW, depositing 0.5-1 mm of ash in the villages of Kanawong, Lehi, Mimi, Kinali, and Pehe. Incandescent lava flows traveled as far as 1-1.5 km to the W down the Beha River and E down the Kahetang River. Seismicity decreased at the volcano in comparison to the previous week and a "red reflection" was visible at night reaching 25 m above the volcano. Karangetang remained at Alert Level 2 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
| Eastern Kamchatka (Russia)
| 54.049°N, 159.443°E
| Elevation 1513 m
On 13 February a pilot reported seeing a W-drifting ash cloud rise to 5 km a.s.l. The cloud was not visible on satellite imagery; it may have been a single burst that dissipated rapidly. On 14 February, after 19 days with no seismic data, the seismic station at Karymsky began to work. Local shallow earthquakes occurred at the previously recorded rate of about 10 events per hour. During 8-15 February thermal anomalies were visible on satellite imagery. The volcano was at Color Concern Code Yellow ("volcano is restless").
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 13-19 February, a small surface lava flow was visible at Kilauea on the Pulama pali scarp. No lava has reached the coastal plain or the ocean since the Kamoamoa and E Kupapa`u entries stopped in late January. Generally, volcanic tremor remained at moderate levels at Pu`u `O`o and long-period earthquakes and weak tremor continued below Kilauea's caldera. Tiltmeters across the volcano showed no evidence of significant deformation.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Sulawesi (Indonesia)
| 1.358°N, 124.792°E
| Elevation 1580 m
After an eruption on 9 February, volcanism decreased at Lokon-Empung through at least the 17th. During 11-17 February, observers saw small volcanic plumes rise 50-150 m above the crater rim. The volcano remained at Alert Level 2 (on a scale of 1-4).
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM)
| Central Java (Indonesia)
| 7.54°S, 110.446°E
| Elevation 2910 m
During 11-17 February there were 65 incandescent lava avalanches observed traveling down Merapi's flanks, predominately WSW to the upstream portions of Lamat and Senowo rivers and partly SW toward the Sat and Bebeng rivers. The maximum run-out distance was ~2.5 km. During the report period, six minor pyroclastic flows traveled up to 2.5 km to the upstream portions of the Lamat and Senowo rivers. According to news reports, Volcanology Development and Investigation Agency staff stated that intense rain during the current rainy season could cause landslides around the volcano's crater. Merapi remained at Alert Level 2 (on a scale of 1-4).
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), The Jakarta Post, The Jakarta Post
| 19.023°N, 98.622°W
| Elevation 5393 m
Seismicity increased slightly at Popocatépetl during 15-16 February after several weeks of low activity. Harmonic tremor and low-magnitude volcanotectonic micro-earthquakes were recorded. During the same period emissions of gas, steam, and some ash occurred. CENAPRED stated that the activity was possibly related to the ascent of magma and the formation of a new lava dome. They added that this activity could lead to explosions in the next days to weeks. The volcano remained at Alert Level Yellow Phase II.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
During 8-15 February volcanism increased at Shiveluch and KVERT raised the Color Concern Code on 15 February from Yellow ("volcano is restless") to Orange ("volcano is in eruption or eruption may occur at any time"). During the report period seismicity was above background levels, thermal anomalies were visible on satellite imagery, and several gas-and-ash eruptions occurred. The highest rising gas-and-ash cloud was produced from an eruption on 14 February at 0835; it reached ~ 3 km above the volcano's dome. A short-lived eruption on 15 February at 1501 produced a gas-and-ash plume that rose to 2 km above the dome and pyroclastic flows that extended 2.5 km to the SE. During 1613-1725 the same day, a dense ash plume continuously rose to 2 km above the dome. The Tokyo VAAC received a report that an eruption on 19 February at 1443 produced an ash cloud that reached a height of ~6.7 km above the volcano and drifted to the ESE.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
| 16.72°N, 62.18°W
| Elevation 915 m
During 8-15 February volcanism at Soufrière Hills decreased slightly in comparison to the previous week. Lava-dome growth continued to be focussed towards the E and NE, producing numerous rockfalls and small pyroclastic flows in the upper portions of the Tar River Valley. Minor rockfalls of old inactive dome material traveled W to the upper portion of the Gages region. Minor episodes of ash venting occurred throughout the report period and SO2 emissions were slightly lower than the previous week.
Source: Montserrat Volcano Observatory (MVO)
| 1.467°S, 78.442°W
| Elevation 5023 m
On the evening of 13 February Strombolian activity occurred at Tungurahua; incandescent volcanic blocks were hurled up to 1 km from the volcano's crater. The following day a consistent steam plume rose to 1 km above the volcano. Around 15-16 February explosive activity decreased, and then increased on the 17th.
Sources: Instituto Geofísico-Escuela Politécnica Nacional (IG), Washington Volcanic Ash Advisory Center (VAAC)
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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.
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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.
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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.
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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.