Anak Krakatoa: New eruptions

The Indonesian island volcano Anak Krakatau continues to be explosively active and produces volcanic ash. The VAAC Darwin reports ash at 2400 m altitude. MIROVA recorded a weak thermal anomaly with a power of 3 MW and seismic activity is elevated. Unfortunately, there are no longer any usable LiveCam images, because the ash erupted yesterday has soiled the camera.

The VSI recorded 18 seismic signals caused by explosive eruptions. The longest lasted 62 minutes. Harmonic tremors were also recorded. Already at the beginning of the month the earthquakes increased with a low frequency and indicated that magma was moving underground. Further eruptions can be expected.

The eruptions started on 29 December 2019, and initially the volcano increased its activity and erupted phreatic. In the evening, glowing tephra and volcanic ash was also produced.

M 6.0 – 163km W of Port Hardy, Canada

In Canada, two earthquakes with a magnitude of 6.0 occurred. The epicenters were off the west coast near Vancouver Island. The depths of the epicenters are estimated at 10 km. Before the two main impacts, there was a somewhat weaker quake with M 5.7. An aftershock brought it to M 4.7. There are no reports of damage.

The quakes probably manifested themselves in a fault between the spreading zone of the Juan-de-Fuca-Ridge and the Cascadia subduction zone. Many severe earthquakes have already occurred in the region. It is one of the most seismically active areas on earth. Further south lies the US metropolis of Seatlle. A strong earthquake has long been expected there at the Cascadia subduction zone.

Time
2019-12-23 20:56:23 UTC
2019-12-23 11:56:23 -09:00 at epicenter
Location
50.525°N 129.712°W
Depth
10.00 km (6.21 mi)