Semeru volcano (East-Java, Indonesia): continuing lava flow and small explosions
Mi, 1. Jun 2016, 15:2415:24 PM | VON: T
The activity has not changed significantly for several months at Java's highest and most active volcano. The lava flow on the upper southern flank of the volcano remains active. Due to the steep incline, incandescent rockfalls from its side and front are relatively frequent.
View of Semeru's lava flow on the southern flank (PVMBG webcam)
This effusive activity is also accompanied by ongoing explosive activity: intermittent, small to moderate strombolian explosions from the summit vent.
While these explosions have been occurring relatively frequently, their average size has been much smaller than several years ago, when the volcano's typical activity had been best characterized by vulcanian-type explosions, a few daily strong blasts generating ash columns rising up to a few km (with no or little effusive activity on the other hand). This difference could be explained by a change towards less viscous lava being erupted recently, allowing for easier degassing and effusive activity.
So, 14. Feb 2016, 09:57
A pyroclastic flow (hot avalanche of fragmented volcanic material) occurred on the volcano's southern side yesterday morning, reaching 4.5 km length and producing an ash plume that rose to 26,000 ft (8 km) altitude. Darwin VAAC raised the aviation color code to RED. ... Read all