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Bulletin of World Volcanism December 2012

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BULLETIN OF WORLD VOLCANISM Bulletin of World Volcanism Issue: December 2012 NEW ACTIVITY/UNREST Copahue (Chile/Argentina)…………. 3 Continued on the inside Yeni Bulunan (Turkey)………………3 NEW INSIGHTS San Cristobal (Nicaragua).………….. 3 Small phreatic explosions at Copahue in 2001 and mid-2012..…. 17 Tolbachik (Russia)……….…………..4 Tungurahua (Ecuador)……………….5 Paluweh (Indonesia)……..…………..6 VOLCANO ANALYSIS White Island (New Zealand)…….….. 6 Kueishantao…………….…………. 18 Pacaya (Guatemala)………….………7 Langila (Papua New Guinea)……….. 7 PLINY AWARD OF THE 7 Chirpoi (Russia)………..…………… YEAR Ulawun (Papua New Guinea)………..7 …...................................................... 20 Lokon-Empung (Indonesia)………… 7 Marapi (Indonesia)………….………. 8 Unnamed (Black Sea)….…………….8 Aoba (Vanuatu)……..………………..8 Turrialba (Costa Rica)……..…….….. 8 Adatara (Japan)………………………8 Ol Doinyo Lengei (Tanzania)………..8 Sangeang Api (Indonesia)….….….… 9 BULLETIN OF WORLD VOLCANISM 2 CONTINUING ACTIVITY BULLETIN INFORMATION Writer (s); Lucas Wilson [Editor] Reventador (Ecuador)………………9 Promotion; Tom Pfeiffer Etna (Italy)……….….….….………. 9 Partners with: VolcanoDiscovery Ambrym (Vanuatu)………………… 9 Contact: [email protected] Nevado Del Ruiz (Colombia)……… 9 Kliuchevskoi (Russia)……..………..9 For more information visit: 10 Machin (Colombia)……..………….. volcanismbulletin.org Heard (Australia)…….…………..… 10 Kilauea (USA)………..……………. 10 Pagan (USA)…….…….……………11 FALSE REPORTS OF Nisyros (Greece).………….…..……11 VOLCANIC ACTIVITY Batu Tara (Indonesia)..…….………..11 A report of a volcanic eruption in Galeras (Colombia)…………………11 Rasuwa, Nepal, was actually a large Santa Maria (Guatemala)…..…….…11 Forest fire. Karymsky (Russia)……………….... 12 Kizimen (Russia)…………….…….. 12 Manam (Papua New Guinea)…….…12 Popocatepetl (Mexico)….…………..13 Sakura-Jima (Japan).……….……….13 Shiveluch (Russia).………………… 14 Karengetang [Api Siau] (Indonesia)..14 Joint project with: Bagana (Papua New Guinea)……….14 Fuego (Guatemala)………………… 14 Stromboli (Italy)……….…………... 14 http://www.volcanodiscovery.com/adventure- travel.html: Volcano Tours http://www.volcano-news.com/: Volcano News BULLETIN OF WORLD VOLCANISM 3 WORLDWIDE MONTHLY VOLCANIC ACTIVITY on 24th December, an ash plume from Copahue drifted to the Atlantic Ocean (around 800 KM away). The Alert Level was lowered to ORANGE. The SERNAGEOMIN reported fresh ash emissions on 27th December, with ash plume rising to a height of 3 KM and drifting 50 KM NE. Strong S02 emissions were detected. On 28th December, incandescence was detected on webcam images, indicating small strombolian activity from the summit. The SERNAGEOMIN reported that eruptive activity continued until 29th December, during the eruption, a small lava dome was emplaced which is now cooling. Above; the initial eruption plume from Copahue on 22 NAME: Yeni Bulunan December. LOCATION: Turkey NAME: Copahue HEIGHT: - 200 M? LOCATION: Chile/Argentina border TYPE: Submarine Volcano HEIGHT: 2997 M COORDINATES: Unknown TYPE: Stratovolcano A volcanic eruption most probably started in the COORDINATES: 37.85°S 71.17°W Marmaris Sea between the Turkish mainland and the A satellite image taken at 10:45 (UTC), 22nd Greek island of Symi in December. Many December shows an ash plume from Copahue earthquakes were detected in the region in the past drifting 110 KM SE form the volcano. few months. A study by scientists of Istanbul's A Satellite image taken on 14:45 (UTC) on 22 Technical University revealed two active vents at a November shows a large ash plume reaching a depth of 200 M below sea level on an N-S trending height of 9.5 KM and drifting 300 KM from fissure 2.5 – 3 KM in length. A rise in sea Copahue volcano. Ash fall was reported in temperature was detected above the vents, Loncopue village in Argentina, 50 KM SE of the suggesting eruptions of lava. For purposes of future volcano. A 15 KM exclusion zone was set up reference to this volcano the name ‘Yeni Bulunan’ around the volcano. The Alert Level for the volcano meaning ‘New Found’ in Turkish has been given. was initially raised from GREEN to ORANGE, then NAME: San Cristobal to RED. LOCATION: Nicaragua HEIGHT: 1745 M On 22nd December at 21:43 (local time), a strong TYPE: Stratovolcano harmonic tremor was noted from the volcano. After COORDINATES: 12.702°N 87.004°W this episode (which lasted around 5 minutes), two The INETER reported that at 18:00 (local time) on explosions took place accompanied by loud noises. Strong incandescence was visible from an area of 25th December, seismic activity began to increase. the summit crater during the explosions (probably At 20:00 (local time), a series of small explosions meaning that these explosions were were detected. Activity continued until 10:00 (local phreatomagmatic). time) on 26th December. The Darwin VAAC The SERNAGEOMIN reported that from 23rd – 24th reported ash plumes reaching heights of 2.4 KM. December, strombolian explosions ejected ash to a The INETER reported that on 26th December, height of 450 M; the tremor signal was low. The activity resumed later in the day with 4 more Buenos Aires VAAC reported that on 23rd explosions detected, with ash plume rising 500 – 800 December, satellite imagery show gas and steam M above the crater. The Darwin VAAC reported ash plumes with possible small ash content drifting SE. plumes rising to an altitude of 4.2 KM. Ash fall was reported 6 KM away from the volcano. The INETER Activity at the volcano on 25th December was low, with a dozen small explosions detected; the tremor reported that on 27th December, modest volcanic signal was low. The Buenos Aires VAAC stated that activity continued. BULLETIN OF WORLD VOLCANISM 4 Above; eruption of San Cristobal volcano in December. NAME: Tolbachik LOCATION: Russia (Kamchatka) HEIGHT: 3682 M TYPE: Shield Volcano COORDINATES: 55.830°N 160.330°E On 1st December, the MODVOLC stated that thermal anomalies detected at Tolbachik indicated that the lava flows were now 15 KM long. The data also indicated that the activity is now concentrated on the southern part of the fissure. The KVERT reported on 5th December that a gas- and-ash plume rose to a height of 4 KM a.s.l. Thermal anomalies indicate that the lava flow is now being channelled down a single route. The KVERT stated that this activity is most probably building a new cinder cone. On 7th December, the KVERT reported that seismic signals were weaker than that of those the previous week. More explosive activity is beginning to take over as most of the activity was focused on the southern vent. The Tokyo VAAC reported that ash plumes from Tolbachik rose to a height of 4 KM. Lava had flowed 17 – 20 KM away from the S fissure by 7th December. Ash plumes rose less than 500 M during 1st – 5th December, and minor ash fall Top; one of the cinder cones in eruption on the flank of was reported in Kozyrevsk (40 KM NW) and Tolbachik on 6 December, a very fluid lava flow can be Klyuchi (65 KM NW) villages on 3rd December. seen travelling from it. Gas-and-steam plumes drifted 250 KM SE on 5th Middle; strombolian activity of one of the cinder cones on December, and rose as high as 1 KM during 7th – 8 December. 11th December and drifted SW and W Bottom; fire fountains and an ash-laden plume from one One Newspaper article reported that effusion rates of the cinder cones on Tolbachik. may be higher than in 1975 (The Great Tolbachik Fissure Eruption). If this is true, it is the largest drifted in multiple directions, and at least two cones eruption ever recorded from Tolbachik. grew above the fissure. A very large thermal The Tokyo VAAC reported ash plumes reported 4.5 anomaly on the N part of Tolbachinsky Dol was visible in satellite imagery. KM high ash plumes on 13th December. th st th The KVERT reported that from 17 – 21 December The KVERT reported on 17 December that the S fissure along the W side of Tolbachinsky Dol, a Tolbachik was undergoing vigorous eruptive lava plateau on the SW side of Tolbachik, continued activity. The tremor signal had doubled in size to produce very fluid lava flows that travelled 17 – compared to previous days. Strong seismicity was th st detected. Ash plumes rose less than 1 KM and 20 KM during 17 – 21 December. Strong BULLETIN OF WORLD VOLCANISM 5 seismicity was detected. Gas-and-ash plumes 14:35 (local time) on 14th December produced a drifted in multiple directions, and a fifth cone grew "cannon shot" sound and shook the ground. An ash- above the fissure. A very large thermal anomaly on and-steam plume rose 6 – 7 KM and drifted NW. the N part of Tolbachinsky Dol was visible in Pyroclastic flows travelled down the SW flank. The satellite imagery Washington VAAC reported that an 11-KM-wide The KVERT reported that the S fissure along the detached ash plume was observed in satellite imagery W side of Tolbachinsky Dol, a lava plateau on the drifting 17 KM SE. On 15th December, IG reported SW side of Tolbachik, continued to produce very that an explosion was followed by an ash-and-gas fluid lava flows during 21st – 28th December. plume that rose 2 KM above the crater and drifted S Strong seismicity was detected. Gas-and-ash and SE. Small amounts of ash fell in Runtún (6 KM plumes drifted in multiple directions, and a fifth NNE). cone continued to grow above the fissure. A very On 16th December a large explosion generated ash large thermal anomaly on the N part of plumes that rose to a maximum height of 7 KM and Tolbachinsky Dol was visible daily in satellite contained lightning. Other explosions generated ash imagery. plumes that rose 2 KM. Satellite imagery showed ash NAME: Tungurahua plumes drifting 140 KM NW, and 110 KM NE at an LOCATION: Ecuador altitude of 7.9 KM a.s.l. Tephra fell in Cotaló (8 KM HEIGHT: 5023 M NW), Pondoa (8 KM N), Runtún, and Pillate (8 KM TYPE: Stratovolcano W), and coarse ash fell in Baños (8 KM N), Vascún, COORDINATES: 1.467°S 78.442°W and Ulba (NNE).
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