Events on the USGS list
Three rows on the USGS list of the 20 largest earthquakes since 1900 sit on this margin. They are copied below. The 1964 M9.2 Alaska earthquake and the Aleutian events are on the Alaska-Aleutian page so the two sides of the date line are not one table.
| Earthquake | Mag | Time (UTC) | Epicenter |
|---|---|---|---|
| 1952 M9.0 Kamchatka | 9.0 | 1952-11-04 16:58 UTC | 52.62, 159.78 |
| 1963 M8.5 Kuril Islands | 8.5 | 1963-10-13 05:18 UTC | 44.87, 149.48 |
| 1923 M8.4 Kamchatka | 8.4 | 1923-02-03 16:02 UTC | 54.49, 160.47 |
The 4 November 1952 Kamchatka earthquake is M9.0, 16:58 UTC, epicenter 52.62°N, 159.78°E. The 3 February 1923 Kamchatka earthquake is M8.4, 16:02 UTC, epicenter 54.49°N, 160.47°E. The 13 October 1963 Kuril Islands earthquake is M8.5, 05:18 UTC, epicenter 44.87°N, 149.48°E.
One rectangle, two island chains
The Kamchatka / Kuril Islands rectangle is latitude 40 to 65 and longitude 140 to 165. All three epicenters fall inside it. The box is a filter for the live map. It is not a trench digitization, and it is not a statement that the 1952 and 1963 earthquakes ruptured the same patch of fault.
No volcano profile on this page
The Smithsonian snapshot includes Kamchatka and Kuril volcanoes, and the volcano map can draw them. This page does not pick one cone and retell its catalog row. A volcano coordinate and these epicenters answer different questions. The distance tool will measure kilometers between a point you type and these epicenters. The kilometers are not a hazard score.