Activity for the week of 8 January-14 January 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
| Kyushu (Japan)
| 32.884°N, 131.104°E
| Elevation 1592 m
On 27 December 2013 JMA raised the Alert Level for Aso to 2 (on a scale of 1-5) because volcanic tremor amplitude had been increasing since 20 December. However, on 2 January 2014 the amplitude rapidly decreased. Sulfur dioxide emissions were 1,200 tons per day during 2-9 January and 1,500 tons on 10 January. Volcanic tremor amplitude increased between 0800 and 1900 on 12 January. At 1215 on 13 January a very small eruption from Naka-dake Crater generated a grayish white plume that rose 600 m and drifted S, producing ashfall downwind.
Source: Japan Meteorological Agency (JMA)
| Chuginadak Island (USA)
| 52.825°N, 169.944°W
| Elevation 1730 m
AVO reported that no further activity at Cleveland had been detected after three brief explosions on 28 and 30 December, and 2 January; satellite images suggested no new lava effusion. On 10 January AVO lowered the Volcanic Alert Level to Advisory and the Aviation Color Code to Yellow.
Source: US Geological Survey Cascades Volcano Observatory (CVO)
| 14.382°N, 90.601°W
| Elevation 2569 m
INSIVUMEH reported that during 9-10 January explosions at Pacaya ejected lapilli up to 70 m above the crater. White and blue fumarolic plumes drifted SE, and the seismographs recorded constant tremor. On 11 January Strombolian activity was observed, and new craters on the E, S, and W flanks produced lava flows as long as 1.5 km. Activity from the main crater increased; explosions ejected tephra 75 m high and gas plumes rose 200-600 m. CONRED reported evacuations from Villa Canales (14 km NW), El Chupadero (2-2.5 km S), and San Vicente Pacaya (5 km NW). INSIVUMEH noted that RSAM values decreased throughout the day. Activity further decreased on 12 January. Explosions ejected tephra 100 m above the crater and gas plumes rose 200-300 m. Lava effusion, Strombolian activity, and seismicity declined. During 12-13 January lava effusion remained low and lava flows reached 2.8-3 km long. Bluish-white gas plumes rose 300 m. During 13-14 January Strombolian activity ejected lapilli as high as 70 m, and blue and white plumes drifted S.
Sources: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH), Coordinadora Nacional para la Reducción de Desastres (CONRED)
| El Salvador
| 13.434°N, 88.269°W
| Elevation 2130 m
SNET reported that during 8-10 January activity at San Miguel was low. The number of seismic events fluctuated but remained at low levels, sometimes lower than values recorded before the eruption on 29 December 2013. Gas emissions were also low and characterized by light gray plumes that rose 100-150 m above the crater and drifted S. RSAM values and sulfur dioxide emissions increased for a period of time during 11-12 January, but decreased again to low levels.
Source: Servicio Nacional de Estudios Territoriales (SNET)
| 3.17°N, 98.392°E
| Elevation 2460 m
PVMBG described activity at Sinabung during 3-10 January based on observations from a post in the Ndokum Siroga village, 8.5 km away. Each day ash plumes rose as high as 5 km, pyroclastic flows traveled 0.5-4.5 km E, SE, and S, and incandescent material was observed as far as 2 km SE and E. Roaring was periodically heard and burned trees on the S flank were noted on 4 January. Seismicity remained high, with constant tremor, hybrid earthquakes indicating a growing lava dome, and volcanic earthquakes. The number of low-frequency earthquakes dropped dramatically, however. The Alert Level remained at 4 (on a scale of 1-4). Visitors and tourists were prohibited from approaching the crater within a radius of 7 km on the SE flank and 5 km elsewhere. Badan Nacional Penanggulangan Bencana (BNPB) reported that the number of hybrid earthquakes decreased on 11 January and volcanic earthquakes increased. Ash plumes rose 1-5 km and drifted W, and pyroclastic flows traveled 1-4.5 km SE and 1 km E. Several villages in the Namanteran district reported ashfall. The 11 January report noted that the number of displaced people reached 25,516 (7,898 families) in 38 evacuation centers.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG, also known as CVGHM), Badan Nacional Penanggulangan Bencana (BNPB)
| Kyushu (Japan)
| 31.593°N, 130.657°E
| Elevation 1117 m
JMA reported that during 6-10 January two explosions from Sakurajima's Showa Crater ejected tephra as far as 1,300 m. The Alert Level remained at 3 (on a scale of 1-5). The Tokyo VAAC reported that an explosion on 9 January generated a plume that rose to an altitude of 1.8 km (6,000 ft) a.s.l. and drifted SE. A pilot observed an ash plume drifting SE on 14 January.
Sources: Japan Meteorological Agency (JMA), Tokyo Volcanic Ash Advisory Center (VAAC)
| Kuril Islands (Russia)
| 48.98°N, 153.48°E
| Elevation 724 m
SVERT reported that a thermal anomaly over Chirinkotan was observed in satellite images on 9 and 12 January. Cloud cover obscured views on the other days during 7-13 January. The Aviation Color Code remained at Yellow.
Source: Sakhalin Volcanic Eruption Response Team (SVERT)
| Halmahera (Indonesia)
| 1.693°N, 127.894°E
| Elevation 1229 m
Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 13-14 January ash plumes from Dukono rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted about 110 km NE.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| Sicily (Italy)
| 37.748°N, 14.999°E
| Elevation 3295 m
INGV reported that during 4-9 January 2014 pulsating and almost continuous ash emissions rose from Etna's Northeast Crater (NEC). Volcanic tremor amplitude remained at low levels.
Source: Sezione di Catania - Osservatorio Etneo (INGV)
| 14.473°N, 90.88°W
| Elevation 3763 m
In a special report, INSIVUMEH reported that on 7 January seismicity at Fuego increased. Explosions generated shock waves that vibrated structures more than 15 km away, and rumbling noises were audible 30 km away. Ash plumes rose 4.2 km above the crater and drifted 10 km SW. Lava flowed 500 m down the SW flank and produced avalanches that reached vegetated areas. During 9-10 January Vulcanian explosions generated shock waves detected within 10 km, ejected pulses of incandescent material 100 m high, and produced ash plumes that rose 300 m and drifted 10 km NE. Avalanches descended the Ceniza (SSW), Trinidad (S), and Taniluya (SW) drainages, and lava flows continued to descend the flanks. During 10-11 January explosions produced shock waves, and ash plumes that rose 650 m and drifted S, SW, and W. Crater incandescence was observed at night. During 12-13 January explosions caused shock waves that vibrated structures in Panimaché I and II (8 km SW), Morelia (9 km SW), Santa Sofía (12 km SW), Ceilán, La Rochela, and San Andrés Osuna. Ash plumes rose 350-650 m and drifted 10 km SW and W. Incandescent material was ejected 200 m above the crater and avalanches descended the Taniluya, Ceniza, Trinidad, Las Lajas (SE), and Honda (E) drainages. A 200-m-long lava flow traveled down the Trinidad drainage. Seismicity remained high on 13 January. Ashfall was reported in Panimaché, Morelia, and Sangre de Cristo (8 km WSW). A 500-m-long lava flow remained active in the Ceniza drainage. On 14 January explosions generated shock waves audible 8 km away, ejected incandescent material 150 m high, and produced ash plumes that rose 300-800 m and drifted 8 km W and SW. Avalanches again descended multiple flanks. Ash fell in Santa Sofía, Panimaché, Morelia, and Sangre de Cristo.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
| Eastern Kamchatka (Russia)
| 54.049°N, 159.443°E
| Elevation 1513 m
KVERT reported that Vulcanian and Strombolian activity at Karymsky continued during 3-10 January. Satellite images detected a bright thermal anomaly on the volcano daily, and an ash plume that drifted 10 km SSE on 8 January. The Aviation Color Code remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 8-14 January 2014 HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. At Pu'u 'O'o Crater, glow emanated from spatter cones on the N and S portions of the crater floor. Fed by the NE spatter cone, the Kahauale’a 2 lava flow had reached 7.5 km long by 9 January (based on a satellite image), and was active with scattered break-out flows that burned the forest N of Pu'u 'O'o.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
KVERT reported that during 3-10 January a newer lava dome continued to extrude onto the NW part of Shiveluch's older lava dome. Lava-dome extrusion was accompanied by hot avalanches, incandescence, and fumarolic activity. Moderate ash explosions generated ash plumes that rose to altitudes of 4-5 km (13,100-16,400) a.s.l. A thermal anomaly was detected daily in satellite images, and ash plumes drifted 360 km SW and 278 km WNW on 7 and 9 January, respectively. On 12 January strong explosions generated ash plumes that rose to altitudes of 7-8 km (23,000-26,200 ft) a.s.l. and drifted ESE. The next day a video camera recorded an ash plume from an explosion that again rose to altitudes of 7-8 km (23,000-26,200 ft) a.s.l. The ash plume drifted 50 km WSW. According to a news report minor amounts of ash fell in Klyuchi Village, 50 km SW. The Aviation Color Code remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), RIA Novosti
| Ryukyu Islands (Japan)
| 29.638°N, 129.714°E
| Elevation 796 m
Based on information from JMA, the Tokyo VAAC reported that explosions from Suwanosejima during 8-9 January sometimes generated plumes that rose to an altitude 1.2 km (4,000 ft) a.s.l. and drifted NE and SE.
Source: Tokyo Volcanic Ash Advisory Center (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.
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