Nanmadol formed on September 13, 2022, as the 14th named storm of the 2022 Pacific typhoon season, strengthened to a typhoon on September 15, and reached super typhoon status on September 16. The system is still strengthening and is expected to reach Kyushu, Japan by September 18.
Tropical Storm “Fiona” formed at 01:50 UTC on September 15, 2022, as the 6th named storm of the 2022 Atlantic hurricane season. The center of Fiona is expected to move across the Leeward Islands Friday night and early Saturday, and move near the Virgin Islands and Puerto Rico late Saturday into Sunday.
New activity/unrest was reported for 4 volcanoes from September 7 to 13, 2022. During the same period, ongoing activity was reported for 18 volcanoes.
Typhoon “Muifa” made its first landfall in China on the coast of Zhoushan, Zhejiang Province at approximately 12:30 UTC on September 14, 2022, with maximum sustained winds of up to 151 km/h (94 mph), and the second in Shanghai’s Fengxian District at 16:30 UTC, with maximum sustained winds of up to 126 km/h (78 mph).
A seismic swarm started under Trident stratovolcano, Alaska on August 24, 2022, likely driven by the movement of magma or magmatic fluids. The swarm is still in progress but now at a decreased rate. The last eruption of this volcano took place in 1974 (VEI 3).
China’s national observatory issued a red alert, the most severe warning level, on Wednesday, September 14, 2022, as Typhoon Muifa is expected to make landfall twice later in the day-the first in coastal areas between Sanmen County and Zhoushan City in Zhejiang Province around nightfall, and the second in coastal areas between Jiaxing City in Zhejiang Province and Shanghai’s Pudong District on Wednesday evening, with maximum 1-minute sustained winds of 130 km/h (80 mph).
A very strong earthquake registered by the USGS as M7.0 hit southeast of the Loyalty Islands, New Caledonia at 11:04 UTC on September 14, 2022. The agency is reporting a depth of 124 km (77 miles). EMSC is reporting M6.9 at a depth of 143 km (88 miles).
Home Reef submarine volcano in Tonga started erupting on September 9, 2022 and re-emerged above sea level. The activity at the volcano is fumarolic, releasing gas into the atmosphere up to 1 km (3 200 feet) above sea level. A Hazard Alert was issued to all marines to sail at least 5 km (3.1 miles) away from the volcano.
A shallow earthquake registered by the USGS as M5.8 hit the American Samoa region at 05:08 UTC on September 14, 2022. The agency is reporting a depth of 10 km (6.2 miles). EMSC is reporting M5.8 at a depth of 40 km (25 miles).
The remnants of Tropical Storm “Kay” brought more flash flooding to parts of Southern California on September 12 and 13, 2022, with mud and debris flows sweeping through three San Bernardino County communities.
