Activity for the week of 5 November-11 November 2014
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
| 0.817°N, 77.938°W
| Elevation 4698 m
On 4 November Servicio Geológico Colombiano's Observatorio Vulcanológico and Sismológico de Pasto (SGC-OVSP) reported that seismic activity at Cerro Negro de Mayasquer and Chiles volcanoes remained elevated. Since 29 September 2014 about 132,000 earthquakes had been detected, with 3,200 of those events occurring on 4 November. During the previous week hypocenters were located 0.3-6.3 km S and SW of Chiles, at depths of 3-9 km below the summit. Local magnitudes were between 0.7 and 4.6. The Alert Level remained at Orange (level 3 of 4).
Source: Servicio Geológico Colombiano (SGC)
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 5-11 November HVO reported that Kilauea’s 27 June NE-trending lava flow continued to be active. Breakout lava flows behind the stalled leading edge continued to advance. On 10 November the closest active lava to Pahoa Village Road was about 450 m upslope of the road, on the N margin of the flow field. Multiple breakouts were active around Apa’a Street and Cemetery Road. Lava advanced to within 20 m of the transfer station fence and through residential property across the street; at 1155 an unoccupied home on that lot was ignited by advancing lava.
The circulating lava lake occasionally rose and fell in the deep pit within Halema'uma'u Crater. Gas emissions remained elevated. The plume from the vent continued to deposit variable amounts tephra onto nearby areas; smaller particles may have been dropped several kilometers away. At Pu'u 'O'o Crater, glow emanated from several outgassing openings in the crater floor.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| 19.023°N, 98.622°W
| Elevation 5393 m
CENAPRED reported that a small series of explosions at Popocatépetl, starting at 2003 on 4 November and ending at 0130 on 5 November, produced a continuous plume of gas, steam, and small amounts of ash that rose 1 km and drifted N. The seismic network detected 191 explosions during the period. Incandescent material was periodically ejected onto the N and E flanks, as far as 800 m. Ashfall was reported in Paso de Cortes.
On 6 November a small rockslide on the SW flank was recorded by a webcam and the seismic network. Scientists aboard an overflight observed dome 53, emplaced during 4-5 November; it was an estimated 250 m in diameter and 30 m thick. During 7-11 November seismicity indicated continuing emissions of water vapor, gas, and occasional small amounts of ash. Incandescence from the crater was observed most nights. Explosions were detected during 10-11 November. The first explosion ejected incandescent tephra and generated an ash plume that rose 1.2 km and drifted SE. Others generated plumes that rose as high as 1.2 km and drifted SE and E. The Alert Level remained at to Yellow, Phase Two.
Source: Centro Nacional de Prevencion de Desastres (CENAPRED)
| Costa Rica
| 10.025°N, 83.767°W
| Elevation 3340 m
On 7 November OVSICORI-UNA reported that seismic activity at Turrialba had decreased overall during the previous few days. A seismic signal indicating a strong emission started at 2320 on 6 November and lasted about 50 minutes.
Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
| Eastern Kamchatka (Russia)
| 53.589°N, 159.15°E
| Elevation 2899 m
KVERT reported that a strong explosive eruption at Zhupanovsky occurred at 0955 on 8 November, generating an ash plume that rose to an altitude of 10 km (32,800 ft) a.s.l. and drifted 26 km SSW. The Aviation Color Code was raised to Orange. On 9 November ash plumes detected in satellite images rose to altitudes of 3-4 km (9,800-13,100 ft) a.s.l. and drifted 190-250 km SE.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Kyushu (Japan)
| 31.593°N, 130.657°E
| Elevation 1117 m
JMA reported that nine explosions from Showa Crater at Aira Caldera’s Sakurajima volcano ejected tephra as far as 1,300 m during 4-7 November. An explosive eruption on 7 November generated an ash plume that rose 3.5 km. An eruption later that day from Minami-Dake Crater produced a plume that rose 1.4 km. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that during 5-8 November plumes rose to altitudes of 2.1-4.6 km (7,000-15,000 ft) a.s.l. and drifted NW, W, E, and SE.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
| 16.25°S, 168.12°E
| Elevation 1334 m
On 10 November the Vanuatu Geohazards Observatory reported that activity at Ambrym remained elevated. The Alert Level remained at 2 (on a scale of 0-4).
Source: Vanuatu Meteorology and Geo-Hazards Department (VMGD)
| Bougainville (Papua New Guinea)
| 6.137°S, 155.196°E
| Elevation 1855 m
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 9 November an ash plume from Bagana drifted 65 km S.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| 64.633°N, 17.516°W
| Elevation 2000 m
During 5-11 November, IMO maintained Aviation Colour Code Orange due to continued activity at Bárdarbunga’s Holuhraun eruptive fissure. Subsidence of the Bárdarbunga Caldera continued, and seismicity remained strong. The lava field was 60 square kilometers on 9 November. Local air pollution from gas emissions persisted.
Source: Icelandic Met Office (IMO)
| 14.473°N, 90.88°W
| Elevation 3763 m
INSIVUMEH reported that during 6-8 November explosions at Fuego produced ash plumes that rose 500-1,050 m above the crater and drifted 10 km WSW. Shock waves from some of the explosions rattled structures within a 12-km radius. The larger explosions generated block avalanches that descended the Santa Teresa (W), Taniluyá (SW), Cenizas (SSW), El Jute (SE), and Las Lajas (SE) ravines. Ashfall was reported in villages on the W and SW flanks.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
| Luzon (Philippines)
| 13.257°N, 123.685°E
| Elevation 2462 m
PHIVOLCS reported that during 5-11 November white plumes rose from Mayon's crater and drifted S, SW, WSW, WNW, and NW, sometimes downslope. Weak incandescence from the crater was noted some nights. As many as five volcanic earthquakes were recorded per day. The Alert Level remained at 3 (on a 0-5 scale).
Source: Philippine Institute of Volcanology and Seismology (PHIVOLCS)
| Honshu (Japan)
| 35.893°N, 137.48°E
| Elevation 3067 m
JMA reported that cloud cover often prevented visual observations of Ontakesan during 5-11 November; white plumes rose 200-300 m above the crater rim and drifted NE, E, and SE. The Alert Level remained at 3 (on a scale of 1-5).
Source: Japan Meteorological Agency (JMA)
| 0.077°S, 77.656°W
| Elevation 3562 m
IG reported moderate volcanic activity including explosions, long-period earthquakes, harmonic tremor, and tremor at Reventador during 5-11 November. On 11 November steam plumes with a minor ash content rose 1 km and drifted NW. Cloudy conditions frequently obscured views of the summit.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
KVERT reported that during 31 October-7 November lava-dome extrusion onto Sheveluch’s N flank was accompanied by incandescence, hot avalanches, and fumarolic activity. Satellite images detected a thermal anomaly over the dome during 1-3 November; cloud cover prevented views of the volcano on the other days. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Fox Islands (USA)
| 54.756°N, 163.97°W
| Elevation 2857 m
AVO reported that seismicity at Shishaldin remained elevated during 5-11 November. Satellite and webcam views showed nothing unusual; temperatures at the summit were elevated on 5 November. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
| 3.17°N, 98.392°E
| Elevation 2460 m
The Darwin VAAC reported that eruptions from Sinabung were recorded by a webcam during 4-7 and 10-11 November. Based on a report from PVMBG, the VAAC reported that an eruption on 9 November produced an ash plume that rose to altitudes of 3-3.7 km (10,000-12,000 ft) a.s.l. and drifted over 35 km NW.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
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.
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.
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