Earthquakes Up to Magnitude 5.2 Hit California, Alaska, Ryukyu Islands, Scotia Sea, and South Sandwich Islands on June 30, 2025

On June 30, 2025, multiple earthquakes were recorded across various locations including California, Alaska, the Scotia Sea, Japan's Ryukyu Islands, Mexico, Puerto Rico, and the South Sandwich Islands region. The strongest tremors included a 5.2 magnitude earthquake near the Ryukyu Islands, Japan, a 5.1 and a 4.9 magnitude earthquake in the Scotia Sea, and a 4.4 magnitude event in the South Sandwich Islands region. California experienced several smaller quakes ranging from 0.5 to 3.4 magnitude in areas such as Truckee, Aromas, Ferndale, Julian, Salton City, Willow Creek, Fillmore, Lucerne Valley, Boron, and Petaluma. Alaska also recorded multiple quakes, including magnitudes of 3.4 near Sand Point, 3.2 southeast of Sand Point, and several smaller tremors near Lazy Mountain, Deltana, and other locations. Other notable quakes include a 1.8 magnitude event in Baja California, Mexico, and a 1.7 magnitude quake near Guayanilla, Puerto Rico. Texas experienced minor earthquakes with magnitudes up to 2.0 near Big Spring and Stanton. These seismic activities were distributed widely, with most magnitudes below 3.5 except for the notable events in Japan, the Scotia Sea, and the South Sandwich Islands region.