Volcanic & Seismic Activity 

Eruptive Events at Semisopochnoi, Alaska — Alerts Raised

A strong seismic tremor consistent with an eruption was recorded at Semisopochnoi volcano starting at 04:47 UTC (20:47 AKDT) on Oct 26, 2018. Satellite data through 05:00 UTC showed a small ash cloud at about 3.6km (12,000 feet) above sea level, the Alaska Volcano Observatory said. 

A strong volcanic tremor was detected, lasting about 20 minutes, followed by approximately 40 minutes of weaker tremor pulses.

The event forced AVO to raise the Aviation Color Code (ACC) to Orange and Volcano Alert Level (VAL) to Watch.

Small explosions continued to be detected through Oct 27 — the largest of which were recorded at 05:10, 06:46, 08:57 and 14:03 UTC.

Additional explosions are possible and will likely occur without warning, the observatory said.

This new information coupled with intensifying seismicity and a strong tremor signal recorded back on Sept 17 prompted AVO to raise the ACC to Orange and the VAL to Watch.

For the full article from watchers.news click here.

 

History and Uptick

Semisopochnoi is classified as a stratovolcano and had a confirmed VEI 2 eruption back in 1987, according to volcano.si.edu.

The previous confirmed eruption before that was in 1887 (VEI unknown).

Previous suspected eruptions occurred in 1830, 1792, 1790 and 1772 — this looks to be a Grand Solar Minimum volcano, and its reawakening.

The global uptick in earthquakes and volcanoes we’ve witnessed lately is likely attributed to the drop-off in solar activity, coronal holes, and the increase in Galactic Cosmic Rays penetrating silica-rich magma.

Check out this link for more info: https://principia-scientific.org/do-cosmic-rays-trigger-earthquakes-volcanic-eruptions/

KP has been very low in recent days/weeks:

The latest space weather overview plot

GSM

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