Volcano news: Lokon
Lokon volcano (North-Sulawesi, Indonesia): seismic swarm, eruption warning
Wednesday Mar 09, 2016 12:06 PM | BY: T
Earthquake swarm at Lokon volcano on 8 Mar 2016 (VSI)
A warning was issued for the volcano and its alert level raised to 3 ("siaga" - alert, on a scale of 1-4) last Monday after a seismic swarm was detected to occur under the edifice.
Seismicity at Lokon during the past weeks (VSI)
The previous day (7 Mar), PVMBG recorded 25 deep and 138 shallow volcanic quakes, 23 rockfall signals as well as a tremor signal. In addition, deformation (inflation) was measured to occur under the Tompaluan crater.
While no to little changes were seen in surface activity (degassing), these geophysical parameters seem to suggest that internal pressure in the hydrothermal system of the volcano has recently increased and the risk of sudden explosions (phreatic or phreatomagmatic) has to be considered elevated at the moment.
Visitors and locals are advised not to approach the crater within a radius of 2.5 km.
Links / Sources:
Links / Sources:
Wednesday, Jan 13, 2016
The volcano remains at significant unrest and moderate to large explosions could occur any time, the latest evaluation report of the volcano observatory states and alert level is being maintained at 3 ("siaga") on a scale of 1-4. ... [more]
Friday, Nov 13, 2015
The volcano has been relatively calm at the surface, but internal unrest continues to be significant. VSI keeps the alert level at "Siaga" (Alert) or 3 (out of 4), where it has been since July 2011. ... [more]
Wednesday, Nov 11, 2015
PVMBG reported that during 28 October-5 November observers at the post in Kakaskasen Tomohon (North Sulawesi, 4 km from the crater), saw white plumes rising as high as 125 m above the crater. ... [more]
Monday, Aug 31, 2015
A small eruption occurred again last Saturday, producing an ash plume that rose approx. 2 km and drifted northeast, caused a temporary closure of the Manado airport. ... [more]
Thursday, May 21, 2015
An explosion occurred Wednesday (20 May) at 15:22 local time and produced an ash plume of approx 1.5 km height. The eruption was accompanied by strong explosion sounds, that caused concern in nearby villages and the town of Tomohon. After the initial explosion, mild ash venting continued for a while. ... [more]