August 21 , 2015. English. Sinabung , Semeru, Kilauea .
August 21 , 2015.
Sinabung , Indonesia :
Elevation : 2460 m
PVMBG reported that during 31 July-10 August foggy weather sometimes prevented visual observations of Sinabung and the growing lava dome in the summit crater. White plumes rose as high as 500 m above the crater, and lava flows on the flanks were incandescent as far as 2 km S to SE. The occurrence of pyroclastic flows per day ranged from one to seven, although none were noted on 8 August. The pyroclastic flows traveled as far as 4 km E to SE and generated ash plumes that rose as high as 3 km.
Seismicity consisted of avalanche signals, low-frequency and hybrid events, tremor, tectonic events, and volcanic earthquakes; RSAM values increased due to an increase of avalanche signals. Based on information from PVMBG, the Darwin VAAC reported that on 13 August a pyroclastic flow generated an ash plume that rose 1 km above the crater. A thermal anomaly was visible in satellite images. The Alert Level remained at 4 (on a scale of 1-4), indicating that people within 7 km of the volcano on the SSE sector, and within 6 km in the ESE sector, should evacuate.
Sources: Pusat Vulkanologi dan Mitigasi Bencana Geologi , Darwin Volcanic Ash Advisory Centre (VAAC) , GVP
Photos : Sadrah Peranginangin
Semeru, Indonesia :
Elevation 3676 m
PVMBG reported that during 16 July-10 August both white plumes and gray-to-brownish plumes from Semeru were observed rising as high as 600 m above the crater and drifting W and E; inclement weather sometimes prevented observations.
Rockslides from the crater traveled 300 m down the flanks. Seismicity was dominated by explosions and emission signals. The Alert Level remained at 2 (on a scale from 1-4); visitors and residents were warned to avoid the SE flank within 4 km of the crater.
Source: Pusat Vulkanologi dan Mitigasi Bencana Geologi , GVP.
Photo : wisata
Kilauea , Hawai :
19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Kilauea Volcano continues to erupt at its summit and from its East Rift Zone. Tiltmeters at the summit of Kilauea have recorded an inflationary tilt. The East Rift Zone lava flow is active northeast of Pu’u ‘O’o, and all breakouts remain within 8 km (5 mi) of the vent. The flow does not currently pose a threat to communities. Low levels of seismic activity continue across the volcano. At the summit the lava lake is still active.
Tiltmeters at Kilauea’s summit have recorded inflationary tilt beginning on August 19. The summit lava lake remains active, seismic tremor continues with episodic bursts associated with spattering within the Overlook vent. The depth to the surface of the lava within the overlook vent is approximately 67 m below the floor of Halema’uma’u at last check, August 18. Seismicity remains at low levels within the volcano. Summit sulfur dioxide emission rates ranged from 2,000 to 2,200 metric tons/day for the week ending August 15.
Pu’u ‘O’o Observations:
Webcam views of Pu’u ‘O’o during the past day showed no changes in the persistent incandescent crater vents. Seismic activity remains low. The sulfur dioxide emission rate from all East Rift Zone vents was about 390 tonnes/day when measurements were last possible on August 13, 2015.
June 27th Lava Flow Observations:
Webcam views overnight show continued activity on the flow field. The June 27th lava flow is active, with surface flows scattered in 3 areas northeast and east of Pu’u ‘O’o. All active flows are within 8 km (5 mi) of Pu’u ‘O’o. Location of the most distant flows are marked by smoke plumes that are produced when lava creeps into the forest and burns the vegetation.
Source : HVO
Photos : HVO, Bruce Omori.