Yoshida (2026, GRL) · Sanriku-oki_swarm · Seismicity and repeaters

Source: Zenodo record 19383821, Dataset S1 (published catalogue).

15,505 events · 217 repeater events · 80 sequences · 2016-08-15–2025-12-31

Latitude band Time-plot symbol size 1.0× Color Minimum M ≥ 1 Background events

Scroll to zoom around the cursor · Drag to pan · Double-click to reset
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): 38.9 40.35
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.

Time-plot symbol size 1.0×

Click an event to show its details here.

Display bounds: 142.7–144.45°E, 38.9–40.35°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.