Researchers reporting in AGU’s Geophysical Research Letters show that the seismic swarm detected near Mt. Edgecumbe volcano in Southeast Alaska, U.S. in April 2022 was caused by magmatic activity taking place under this transform fault volcano previously considered dormant.
An early-season Great Lakes storm is producing heavy snow, high winds, and large waves. Cold air will grip much of the eastern 2 thirds of the United States in the days ahead, bringing much below-normal temperatures to the East Coast and the first freeze of the season to portions of the Midwest and South.
Heightened unrest continues under Mauna Loa, with two moderately strong earthquakes within 24 seconds on October 14, 2022, and a string of aftershocks that are still taking place. The unrest is likely caused by renewed input of magma into Mauna Loa’s summit reservoir system. The Alert Level remains at Advisory and the Aviation Color Code at Yellow.
The swarm of earthquakes that began on August 24, 2022, beneath Trident stratovolcano, Alaska, U.S. continues. The last eruption of this volcano took place in 1974 (VEI 3).
Hurricane “Ian” made landfall along the southwestern coast of Florida near Cayo Costa, an island off the coast of Fort Myers, around 19:05 UTC (15:05 EDT) on September 28, 2022, with maximum sustained winds of 240 km/h (150 mph), placing it at the upper end of the Category 4 hurricane on the Saffir-Simpson scale. Ian caused a catastrophic storm surge, winds and flooding in the Florida Peninsula, leaving more than 2.6 million customers without power.
NOAA Doppler radar imagery indicates that the eye of Hurricane “Ian” made landfall along the southwestern coast of Florida near Cayo Costa around 19:05 UTC (15:05 EDT) on September 28, 2022.
The center of Hurricane “Ian” is expected to approach the west coast of Florida this morning, September 28, 2022 (LT), and make landfall later today. Strengthening is forecast until it makes landfall, and Ian is forecast to approach the west coast of Florida as an extremely dangerous major hurricane.
Although more than 2 400 km (1 500 miles) away, the M7.6 earthquake in Mexico on September 19, 2022, triggered 1.2 m (4 feet) tall waves in Death Valley’s Devils Hole. A colloquial term for the event is a ‘desert tsunami.’
Seismic activity beneath the Mauna Loa volcano has been gradually increasing over the past 2 months. In addition, a small seismic swarm started on September 23, with most earthquakes in a cluster about 5 km (3.1 miles) wide and -2 to 1 km (-1.2 to 0.6 miles) below the surface. The Aviation Color Code is at Yellow and the Volcano Alert Level at Advisory.
Remnants of Typhoon “Merbok” will bring potentially historical coastal flooding, high surf, coastal erosion, high winds, high seas and heavy rain to western Alaska and the Bering Sea through the weekend, the National Weather Service (NWS) warns.
