01/05/2015. Calbuco, Kilauea , Dukono.
Calbuco, Chili :
According to projections, a new eruptive pulse was recorded on the Calbuco volcano, as confirmed by the National Geology and Mining Service (SERNAGEOMIN).
During the last 24 hours the seismic activity associated with the movement of fluids inside the volcano presented sudden and significant changes in energy, especially during the final hours highlighting the occurrence of untimely minor eruptive pulse at 13:08 (16: 08 GMT) today, with an explosion that generated a column about 3-5 km high at first, then diminishing to the level that occurs at time of the publication of this report. During this period, the amplitude of tremor signal has dominant frequencies between 0.7 to 2.5 Hz and low displacement values [DR, parameter indicating the size of the seismic signal at source] under 28.7 cm2, values considered as high.
Similarly, fourteen (14) events long period (LP), with local magnitudes equal to and less than M1.9 and reduced displacement (DR) of less than 56.3 cm2, values considered as moderate, were recorded. Regarding the type of seismicity VT [associated with rock fracturing] twenty-four (24) earthquakes were recorded, with the greatest energy in a local earthquake of M 0.8 ,located 2 km northwest (NW) of the crater at a depth of 4.2 km.
At the time of publication of this report, the process of eruption still continues with less energy and a downward trend. Comparatively, this eruptive pulse is much less energetic than those which took place on 22 and 23 April. This suggests that the volcanic system remains in an unstable phase may evolve under conditions that promote reactivation of the eruptive activity, and it is suggested to maintain the restricted access to the area near the volcano by criteria defined.
SERNAGEOMIN maintaining Red Alert, the restricted area remains of 20 km around the crater. At the time of the pulse, the wind was heading southeast, which is why the ash column goes to Rio Este, Lago Chapo, Canutillar, Cochamo , Puelo, llanada Grande and El Bolson (Argentina).
Source : Sernageomin.
Photos : reco aérienne Fach , PatoGarridoG , Latercera
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
Inflation continued at the summit of Kilauea Volcano over most of the past day, but switched to deflation this morning. The summit lava lake spilled a short distance out of the Overlook crater, onto the floor of Halema’uma’u Crater, in several brief episodes over the past day. Seismicity beneath the summit and the upper East and Southwest Rift Zones is elevated. At the East Rift Zone eruption site, widespread breakouts are active within about 8 km (5 mi) of Pu’u ‘O’o.
Inflationary tilt continued at Kilauea’s summit over most of the past day, with deflationary tilt appearing around 4 am today. The lava lake level has been at or near the rim of the Overlook crater over the past day, with several brief episodes of lava overflowing a short distance onto the floor of Halema’uma’u Crater. Spattering has been common along the south margin of the lake over the past day. Yesterday at noon the lava level was measured at 2 meters (yards) above the floor of Halema’uma’u Crater. This morning, the lava level dropped slightly and is now several meters (yards) below yesterday’s measurement. Seismicity is elevated beneath Kilauea’s summit and upper East and Southwest Rift Zones. Sulfur dioxide emission rates averaged 4400-5400 tonnes/day for the week ending April 28.
Pu’u ‘O’o Observations:
The tiltmeter on the north flank of Pu’u ‘O’o recorded inflationary tilt over the past day. Otherwise, there were no noticeable changes at Pu’u ‘O’o. The sulfur dioxide emission rate from all East Rift Zone vents was about 700 tonnes/day when last measured on April 28, 2015.
June 27th Lava Flow Observations:
Webcam views of nighttime incandescence and daytime smoke indicate that surface flows remain active northeast of Pu’u ‘O’o. The most distant activity was burning forest about 8 km (5 mi) northeast of the crater when mapped on April 23.
Source : HVO
Dukono , Halmahera , Indonésie:
1,68 ° N, 127.88 ° E
Elevation 1335 m
PVMBG reported that during March-22 April dense white-gray plumes rose as high as 2 km above Dukono’s Malupang Warirang Crater and were accompanied by rumbling and roaring. Seismicity remained high and consisted of explosion signals, volcanic earthquakes, and tremor. The Alert Level remained at 2 (on a scale of 1-4).
Residents and tourists were advised not to approach the crater within a radius of 2 km. Based on analyses of satellite imagery and wind data, the Darwin VAAC reported that on 26-28 April ash plumes from Dukono rose to altitudes of 2.7-3 km (9,000-10,000 ft) a.s.l. and drifted 35-150 km E.
Sources: , GVP , Pusat Vulkanologi dan Mitigasi Bencana Geologi , Centre d’avis de cendres volcaniques Darwin (VAAC)
Photo : GVP