"Less than two months after a magnitude 8.8 earthquake rocked Russia's Kamchatka Peninsula, another strong earthquake occurred early on September 19 local time. Although tsunami waves have been observed closer to the earthquake's epicenter off Kamchatka's eastern coast, shortly before 5 P.M. EDT, officials at the Pacific Tsunami Warning Center announced an all clear for Hawaii, ruling out the possibility of giant waves crossing the Pacific Ocean."
"The July event was among the 10 strongest earthquakes on record; this new temblor won't make that cut. According to Reuters, the Kamchatka region's governor said that there have been no reports of damage from the recent event in the sparsely populated region. USGS has already confirmed that the magnitude 7.8 event is an aftershock of the earlier earthquake, making it the latter quake's largest aftershock to date."
A magnitude 7.8 earthquake struck off Russia's Kamchatka Peninsula on September 19 local time as an aftershock of the July 29 magnitude 8.8 quake. Tsunami waves were observed nearer the epicenter off Kamchatka's eastern coast, but the Pacific Tsunami Warning Center issued an all-clear for Hawaii, ruling out large trans‑Pacific waves. The U.S. Geological Survey estimated the event at magnitude 7.8 and noted the July earthquake released over 30 times the energy and produced waves about ten times larger, reflecting the logarithmic magnitude scale. No damage has been reported in the sparsely populated region, and USGS confirmed the 7.8 as the largest aftershock to date. Both quakes occurred on the Kuril‑Kamchatka plate boundary and tsunami risk appears to be waning.
Read at www.scientificamerican.com
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