Published catalogues
Yoshida, Uno & Bassett (2026, GRL) · 2025aomori-oki_offshore · Seismicity and repeaters
The original catalogue covered a narrower area in 2016–2020. Previously omitted events have been added after relocation with the published hypocentres and origin times held fixed.
Source: Zenodo record 19963531, Dataset S1 (published catalogue).
21,207 events · 631 repeater events · 221 sequences · 2016-08-15–2026-01-31
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Map and lower panel share longitude; map and right panel share latitude; the two time panels share time. Map circles show fault radii at 32 MPa and scale with zoom. Magnitude differences are emphasized in both time plots, using M=3 as the reference. The slider changes symbols in both time plots. Click an event to pin its details.
Background eventsRepeaterM_JMA ≥ 6 (stars)Dashed line: 2011-03-11
Latitude (°N): 40.25 41.85
Repeaters: stronger outlines; background events: lighter outlines. M_JMA ≥ 6: stars in all panels; orange stars mark map epicenters. Time-panel dashed line: 2011-03-11. Map rectangle: catalogue display bounds.
Depth (km):
Shallow → deep. Repeaters have stronger outlines. Stars: M_JMA ≥ 6. Dashed time line: 2011-03-11.
Click an event to show its details here.
Display bounds: 141.8–144.1°E, 40.25–41.85°N, depth 0–100 km, All events in the supplied catalogue are included. No additional magnitude, depth, or plate-distance selection is applied. Repeater sequence IDs follow the sources described above.
Map: circular-crack radius at 32 MPa; M₀ = 10^(1.5 M + 9.1) N m, using catalogue M as an Mw proxy, as in mag2size3. Map circles show equivalent physical fault size, not mapped rupture outlines. Time plot: visual magnitude scaling. Data are embedded for offline use. Map lines: coastline (solid), prefecture boundaries (thin dashed), and catalogue display bounds (bold dashed rectangle). The map preserves local east–west and north–south distance proportions.