Crater 3 remained virtually inactive with only weak white vapour emissions on 17 June.". Steady weak glow was observed for about a week (5-11 October) at Crater 2. Since March 2006, activity has continued at Crater 2. ", Fewer explosions in October, but some larger than usual. Seismicity accompanying this activity not only included the usual discrete explosion earthquakes, but also a number of periods of harmonic tremor, thought to be caused by sequences of prolonged gas discharge at Crater 2. "The 1980 lava flow is blocky, and similar in hand specimen to lavas produced in the 1970's. On 25 April, ash clouds rose to an altitude of 2.5 km. Information Contacts: D. Lolok, B. Talai, and P. Lowenstein, RVO. "An increase in activity at Crater 3, which had been inactive since April 1983, began towards the end of June and continued during July. Crater 2 was more active from the 22nd. There was no visible glow throughout the month. Talawe is the largest volcano in Cape Gloucester. ", Ash clouds; incandescent tephra; lava flows in crater. A daily range of 10-50 explosion earthquakes was recorded at the seismic station until it became non-operational on 24 May. "Vulcanian activity continued from Crater 2 with a pronounced increase toward the end of the month that culminated in the production of a small lava flow on the NE flank. After two explosions at Langila produced ash plumes that rose to 1.5 and 2.1 km in early December 2012 (BGVN 41.01), no further information about the volcano's activity was available from the Rabaul Volcano Observatory or the Darwin VAAC until April 2016. When the summit was free of cloud at night, a steady weak glow was seen above the crater. Crater 2 emitted small amounts of white vapor for most of the month. Few thermal anomalies, based on MODIS satellite instruments analyzed using the MODVOLC algorithm, were identified during the reporting period (March 2010-December 2012). Information Contacts: J. Mori, D. Lolok, and P. Lowenstein, RVO. A blocky lava flow [first noticed on 13 October] had advanced about 2 km on a broad front from Crater 3. At Crater 3 soft explosions were observed several times during the one-hour inspection. Light to moderate ashfalls at the observation post 10 km N of the volcano were recorded on 5 days but mostly in the second half of the month. Ashfalls continued during this period in inhabited coastal areas about 10 km to the NW and N. Weak crater glow was noted on 2 July. was releasing a plume of white vapour with frequent ash-laden clouds accompanied by weak Vulcanian explosions. "During a ground inspection on 8 May, detailed observation of several explosions revealed that blocks were commonly ejected to a height of about 600 m, accompanied by loud roaring. Information Contacts: Rabaul Volcano Observatory (RVO), PO Box 386, Rabaul, Papua New Guinea; Darwin Volcanic Ash Advisory Centre (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, Northern Territory 0811, Australia (URL: http://www.bom.gov.au/info/vaac/); Hawai'i Institute of Geophysics and Planetology (HIGP) Thermal Alerts System, School of Ocean and Earth Science and Technology (SOEST), Univ. The explosion on the 30th was much smaller, the ash column rising only a few hundred meters. and drifted 35-65 km N NE, and E. Based on analyses of satellite imagery, the Darwin VAAC reported that an ash plume from Langila rose to an altitude of 2.1 km (7,000 ft) a.s.l. A similar explosion occurred on 5 February. Brief aerial inspections on 16 and 20 July revealed that eruptions at Crater 2 were taking place at intervals of about 10 minutes. Weak crater glow was observed on only 2 nights (17 and 29 August). Weak to moderate, pale grey emissions from Crater 2 were noted occasionally throughout the month, and weak rumbling, roaring, and explosion noises were heard on a few days during the first half of December. Brilliant lightning displays were reported, and the eruption cloud contained incandescent tephra. Langila Climbing Notes. The seismograph remained inoperative. Two periods of frequent, brief, small-amplitude seismic events occurred 6-9 and 13-16 February. . Vulcanian explosions continued to register on seismograms at an average of about 3 per day. During periods of eruptive activity at Langila Volcano, various combinations of low-frequency earthquakes and high-frequency air waves have been recorded, ranging from earthquakes alone to air waves alone. Information Contacts: B. Talai and P. Lowenstein, RVO. From the observation post about [10] km away, roaring, rumbling and detonations, were heard almost incessantly. and drifted almost 30 km SE. During the brief phase of stronger Crater 3 activity, periods of harmonic tremor were recorded.". Connect; Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that during 25-27 January ash plumes from Langila rose to altitudes of 1.8-3 km (6,000-10,000 ft) a.s.l. Several small vents (<=1 m in diameter), although closely grouped at the base of the crater, were activated independently. However, on the 16th there were two explosions. Crater glow was seen occasionally during the month, and rumbling and explosion sounds were heard daily. These explosions resulted in minor ashfalls to the volcano's SE. Seismicity was generally at a low level. The seismographs were inoperative throughout the month. According to the Darwin VAAC, low-level ash plumes emitted from Langila were visible on satellite imagery during 8-13 June. From the 23rd until the end of the month, continuous dark grey ash clouds rose several hundred meters above the summit. The seismograph was not in operation during February.". Crater 3 was quiet. Continuous fine ashfall occurred at Kilenge Catholic Mission (~10 km NW) and surrounding areas during 22-31 May. Weak steady night glow was visible on 24 and 29 October. Information Contacts: B. Talai, R. Stewart, and P. de Saint-Ours, RVO. There was no activity at Crater 3. "A new crater was formed on the flank of Crater 3 on 19 January. A strong Vulcanian explosion took place on 19 March, and on the 20th further explosions were observed. Source: Rabaul Volcano Observatory (RVO) via the Darwin Volcanic Ash Advisory Center. Fine ashfalls took place at the Cape Gloucester airstrip . During an aerial inspection of the area on 6 June, IFRC determined that ~3,490 people had been affected by the eruption, mainly in the villages of Aitavala, Masele, Kilenge, Ongaea, Potne, and Sumel, but also to a lesser extent in Vem, Galegale, Tauale, and Laut. . Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that on 22 and 24 October ash plumes from Langila rose 2.1 km (7,000 ft) a.s.l. The increase was characterized by nearly continuous ash emissions that rose to 1-2 km above the summit (or 7,650-10,900 ft a.s.l.) . Explosion noises were heard on 4, 5, and 17 April, and weak rumbling noises were heard during 23-27 April. Explosion noises were reportedly loud at the observation post. "Volcanic activity increased markedly in January and was concentrated in Crater 2. . "The short lava flow observed 12 August on the cone's N flank had cooled, but a few rootless fumaroles remained on its surface, which was partly buried under airfall blocks and ash. Gas and ash emissions relatively quiet during May and June. Crater 2 occasionally produced weak to moderate white-grey emissions. Crater 3 remained relatively inactive, usually releasing thin white vapours. Activity at Crater 3 consisted of occasional Vulcanian explosions, at rates of 30-80/day. Activity at Crater 2 consisted of weak emissions of white and blue vapour with occasional rumbling sounds. After the 7th, the activity changed to Vulcanian explosions only, accompanied by weak-to-loud detonations. The emissions also produced continuous roaring noises and booming explosion sounds. A weak explosion probably associated with Crater 2 was heard on 1 July. After an eruption in September 2009, activity at Langila subsided, yet still remained above normal through at least February 2010, with ash plumes rising about 1 km or less above the summit (BGVN 35:02). Preliminary examination of the ash indicated that it contained little or no fresh material. Neither audible noises nor summit glow were noted. This activity was accompanied by nearly continuous low roaring sounds. Crater 3 released very thin to occasionally moderately thick white vapour. Occasional weak rumbling noises were heard from Crater 2, and detonations were heard on the 14th and 22nd. on 22 and 25 August, but reached only several hundred meters after that. Crater 3 released small volumes of white and occasionally blue vapours throughout the month.". Crater 2 activity consisted of continuous release of white vapour, producing a small emission column that frequently (5-15 times/hour) turned into a forceful jet of ash-laden vapour, generating a whooshing sound. The larger explosions, which ejected clouds to as much as 500 m above the crater, generated large-amplitude, impulsive seismic signals, while many of the smaller explosions were almost aseismic. The flow had the rugged surface features of aa lava and was ~300 m long, extending from the crater rim (~1,100 m elev) to 950 m elev. "The eruption continued at moderate to low intensity. Although there was a lull in activity at mid-month, mild eruptive activity continued at Crater 2 in August. A lull in Crater 2 activity was noted 21-25 March but weak ash emission began on the 26th, and explosive activity resumed on the 27th. When one is found the date, time, location, and intensity are recorded. Lava effusion at Crater 3 from 25 to 27 July or longer was associated with increased explosive activity late in the month. "For most of September the activity consisted of weak vapour emission accompanied by occasional small explosions. The ash clouds from these two explosions rose 4 km above the summit before being blown NW. An extensive lava field reaches the coast on the N and NE sides of Langila. Low roaring noises were heard 4-6, 8-9, and 16 July. Steady, weak night glow was visible throughout the second week and on the 22nd and 23rd. Ash clouds from the eruption rose variably to 700-1000 m before they were blown to the W and NW. . ", Explosive eruptions; ash to six kilometers, "A resurgence of activity was evident in August as Vulcanian explosions from Crater 2 became more common. Seismicity remained low throughout the month. On a few days the volcano was again obscured by its own ash emissions. Langila is one of the most active volcanoes in the Bismarck arc. Crater 2 produced thick white emissions while Crater 3 released white or blue vapours. The crater was more strongly active 4-10 October, when small pyroclastic flows were generated at the base of the strongest explosions, but these did not advance beyond the cone's upper flanks. Seismic activity was low and only a few explosion earthquakes were recorded during the month. and drifted 110 km NW on 5 December. Explosions were heard on 1, 2, 6, 24, and 30 June, and a weak red glow was seen above this crater on the night of the 14th. . Loud rumbling noises and sharp explosions were heard at an observation post 9 km N of the volcano. Vulcanian eruptive activity continued at Crater 2 throughout December 2009. Between 5 and 23 April, moderate ash emissions were observed, accompanied by weak to strong rumbling sounds. The latest period of incandescent lava ejections and night glow at Crater 2 ended on 9 May, although there were still moderate emissions of thin-to-thick grey ash-vapour clouds. The nose of the westernmost lobe of the May Crater 2 lava flow was visited. Loud Strombolian explosions occurred at Crater 3, although incandescent ejections remained small. Incandescence was visible on 24 and 25 February and 6 and 8 March. "Sometime between overflights on 28 January and 15 February, effusion of lava commenced on the upper W flank of Crater 3, from the new vent formed on 19 January. Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that during 10-14 May ash plumes from Langila drifted N, NW, and S at altitudes of 1.8-2.4 km (6,000-8,000 ft) a.s.l. No vents were visible in the floor of the crater. Weak red glow was observed over Crater 2 on 25 and 29 September. Commonly the larger Crater 2 explosions registered a seismic airwave. Crater 3 glow or ejections of incandescent tephra were seen beginning then. The strength of the eruption seemed to decrease after the 12th, with only night glow or mild incandescent projections 15-18 February. The intensity of seismic activity remained low. Activity continued at a low level during March. Information Contacts: Rabaul Volcano Observatory (RVO), PO Box 386, Rabaul, Papua New Guinea; Darwin Volcanic Ash Advisory Centre (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, NT 0811, Australia (URL: http://www.bom.gov.au/info/vaac/); Hawai'i Institute of Geophysics and Planetology (HIGP) Thermal Alerts System, School of Ocean and Earth Science and Technology (SOEST), Univ. of Hawai'i, 2525 Correa Road, Honolulu, HI 96822, USA (URL: http://modis.higp.hawaii.edu/). Based on analyses of satellite imagery and model data, the Darwin VAAC reported that during 23 and 26-28 May ash plumes from Langila rose to altitudes of 2.4-3 km (8,000-10,000 ft) a.s.l. There was no visible activity from Crater 3. After Vulcanian activity in the latter part of 2009, activity at Langila subsided, with infrequent activity until 2016, when activity increased somewhat through May 2018 (BGVN 34:11, 35:02, 42:01, and 42:09). Occasional forceful emissions of ash produced plumes that rose ~1 km above the crater (or 7,600 ft a.s.l.) Explosions build to 6-day Strombolian-Vulcanian event. Based on satellite imagery, the Darwin VAAC reported that on 31 October a small ash plume rose to an altitude of 4.6 km (15,000 ft) a.s.l. Langila volcano is located 11 km south of Cape Gloucester, West New Britain. Eruption continues, intensifying from mid-December 2016 through July 2017. No glow or incandescent ejections were observed.". Crater 3 released white vapours throughout August, and blue emissions were seen rarely in the second half of the month. The plume was accompanied by strong explosion sounds and incandescent projections of increasing strength 15-18 February (maximum 400 m above crater). The flow rate was apparently low. Working on Volcanoes; All About Volcanoes. An extensive lava field reaches the coast on the north and NE sides of Langila. "By 15 October, ash-laden emissions from Crater 2 became continuous. "After 7 months of quiescence, Crater 3 was reactivated. and drifted NW. On a few occasions, falls of ash took place in inhabited areas about 10 km downwind from the vent. Weak glow from Crater 2 was observed at night 17-22 January. Explosions and rumbling sounds associated with the emissions were heard throughout the month. Two other very small lava lobes (both inactive) were observed on the NW flank of Cone 3. Until that time activity at Crater 2 was at a moderate level, similar to that observed in February, while Crater 3 showed a low level of activity. ", "Activity remained at a low level in February. "Activity at Crater 2 in the first two weeks consisted mainly of weak-moderate emissions of white-grey vapour. Seismic recording resumed on 25 October; due to problems with the equipment, recording had not occurred since May 1996. This pattern of intermittent activity continued through October 2018. Langila volcano is one of the most active volcanoes in the Bismarck Arc of New Britain. The active vent has formed a funnel-shaped crater in the NE part of Crater 2. The increased activity was characterized by forceful emission of thick pale-gray to dark gray-brown ash clouds from 22-27 May. "Activity at Crater 3 was similar to that in November. In some cases additional feature type, elevation, or location details are provided. No activity was recorded from Crater 3 in July. Vulcanian explosion earthquakes were recorded occasionally. One Vulcanian explosion was observed on 7 February, producing a thick dark ash cloud that rose about 3 km above the vent. The most violent, 11-14 and 22-24 January, ejected incandescent boulders and tephra, illuminating the dark ash-laden column and setting fire to vegetation on the volcano's flanks. "In contrast to activity in January and February 1983, when incandescent lava ejections took place, the more explosive activity at Crater 2 in August was rarely accompanied by incandescence. Emissions from Crater 2 in October consisted of thin white vapour with occasional dark gray, ash-laden convoluting columns rising up to a few hundred meters above the crater. Thick grey and brown plumes were forcefully emitted on 1, 6, and 10 December. According to the Darwin VAAC, a plume from Langila was visible on satellite imagery on 17 December. The daily totals of these events ranged from 15 to 60. The seismographs were inoperative during March and April. Palfreyman W D, Wallace D A, Cooke R J S, 1981. Night glow, observed 3 February, became more intense during this period. Langila volcano: summary of reported eruptive history, and eruption periodicity from 1961 to 1972. The clouds were blown to the N, NW, and SE of the volcano, resulting in fine ashfalls. Activity continued at a low level in December. A weak red glow was observed over Crater 2 on most nights after 23 June.". Twenty explosion shocks were recorded over the background tremor during a 25-minute period after the eruption, and Crater 2 remained incandescent for 45 minutes.". Ashfalls to 10 km from the source were common. . and drifted SW. An image acquired around six hours later indicated that the ash from the event had dissipated. The May activity primarily consisted of the escape of moderately thick gray to brown ash clouds. Despite the decline in observed surface activity, seismicity increased somewhat in December. Although on most days, Crater 2 only occasionally released pale gray ash clouds, from 9 to 19 January, darker gray clouds were emitted. Fine ashfalls extended ~10-15 km from the volcano to the N and NW coasts. Ashfall was reported from Kilenge Catholic Mission (about 10 km NW of the volcano) and surrounding areas during the last few days of May and 1 June. Strong explosions continue; incandescent tephra, "Strong eruptive activity continued during December although a decline was apparent in the last week of the month. Considerable ash fell near the volcano and extended to the W and NW, between Warimo and Aimola. Crater 2 emitted moderate volumes of pale grey ash and vapour, and occasionally there were stronger explosions that propelled ash clouds several kilometers above the summit. Occasional dark ash columns resulted in light ashfalls on the N and NW sides of the volcano. All seismic monitoring ceased on 19 April with the failure of both seismic stations. However, glows and ejections of incandescent lava fragments continued from both craters, and grey ash and vapour clouds continued to be emitted. The seismicity consisted of a few tens to several hundreds of small-amplitude B-type events/day.". Emissions from Crater 3 consisted of weak to moderate white-grey vapour and ash with occasional blue vapour. Crater 2 released a weak to moderate vapour and ash cloud while Crater 3 remained virtually inactive. Intermittent eruptive activity at Crater 2. The seismograph was not operational during January.". Mori, J., Patia, H., McKee, C., Itikarai, I., Lowenstein, P., De Saint-Ours, P., and Talai, B., 1989, Seismicity associated with eruptive activity at Langila volcano, Papua New Guinea: JVGR, v. 38, p. 243-255. The vents were ~5-10 m in diameter, 40 m apart and aligned approximately N-S. "Activity returned to the former degassing mode 7-18 October, but eruptions resumed after the 19th. Occasional loud Vulcanian activity occurred throughout November. "Activity increased somewhat in June as Vulcanian explosions became more frequent. Pale grey emissions from Crater 3 were observed on 2, 14, 16, and 17 April. Information Contacts: Darwin Volcanic Ash Advisory Centre (VAAC), Bureau of Meteorology, Northern Territory Regional Office, PO Box 40050, Casuarina, Northern Territory 0811, Australia (URL: http://www.bom.gov.au/info/vaac/); Rabaul Volcano Observatory (RVO), P.O. Crater 3 remained quiet during October-December. "Crater 3 remained relatively inactive, mainly releasing white vapours. At Crater 2, background levels of moderate white and blue vapour emissions continued, and very weak night glow was seen on 7 September. The explosion was heard [9] km away where fine ashfall was noted. In the first week of November, Crater 3 activity consisted of weak-to-moderate Strombolian explosions and weak lava effusion. The summit area was obscured by rain and clouds on many days in January and February. ", Moderate explosive activity from 2 craters. Crater 3 released small volumes of white, blue, and occasionally grey emissions. Occasionally grey ash clouds were emitted. Activity detected by MODVOLC at Langila was minimal, with only one alert pixel for 2003 (9 April) recorded just above the detection threshold, even though activity observed during January and February 2003 included weak lava projections (BGVN 28:03). Moderate activity took place at Langila during January 2006, including continuous ash fall, rumbling, and weak emissions of lava fragments. Crater glow was observed on 1 and 16 July. No night glow was observed from the crater. and drifted S and SW. Based on analyses of satellite imagery and wind model data, the Darwin VAAC reported that on 5 November an ash plume from Langila rose 3.7 km (12,000 ft) a.s.l. ", "Crater 2 and Crater 3 both produced mild spasmodic eruptions. "Activity intensified in September. ", Explosions, tremor from gas venting; glow seen twice, "Explosive eruptive activity continued at Crater 2, and was stronger 2-6 September. . 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