James St. John:
Han River Estuary, Korea magnitude 3.6 earthquake (1:28 AM, 9 January 2023)
James St. John:
Offshore North Korea magnitude 4.8 earthquake (12:52 AM, 7 September 2023) 1
James St. John:
Offshore North Korea magnitude 4.8 earthquake (12:52 AM, 7 September 2023) 2