Striking At The Root

Strong tremor signal at Semisopochnoi volcano, Aviation Color Code raised to Orange, Alaska

Elevated seismicity that began under Semisopochnoi volcano, Alaska on July 17, 2019, increased overnight and was followed by a stronger tremor signal recorded at 07:39 UTC, July 18. In addition, an infrasound signal was produced on an infrasound array located 260 km…… Read more »

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