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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

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4.2

152 km WNW of Tobelo, Indonesia

20 October 2026, 21:02:57 (+03) 2026-10-20 18:02:57 UTC

2 sources: EMSC, USGS mb
Magnitude
4.2 mb
Depth
35.0 km
Coordinates
2.4707, 126.8562
Data consistency
88/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
1
Last 30 days
19

Approximate energy released

≈ 30 t TNT

1.26e+11 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

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Community reports

Based on voluntary reports from users; not an instrumental measurement or official intensity. For official information follow AFAD and Kandilli Observatory announcements.

Impact information reported by sources

  • USGS Earthquake Hazards Program Tsunami flag: No

These values are automatic products of the respective agency, not an assessment by this platform. For tsunami warnings follow the Kandilli Observatory Regional Earthquake-Tsunami Monitoring Center and AFAD.

Nearby places

No records.

Nearby faults (50 km)

No mapped fault within 50 km.

Last year, within 100 km

26 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 4
  • M3 15
  • M4 5
  • M5 2
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 1
  • 10–20 km 7
  • 20–40 km 3
  • 40–70 km 5
  • 70–150 km 9
  • 150+ km 1

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

Comparison with past records

…

No earlier earthquakes are recorded in this area.

  • Source:

Where does this earthquake come from?

Source comparison

Sources report different values.
Agency Magnitude Depth Time (UTC) Difference from master Original record
EMSC-CSEM
MOLUCCA SEA
3.9 m 12.0 km 18:02:58.000 Δt 0.63 sn · 4.61 km · ΔM -0.3 Original record
USGS Earthquake Hazards Program Displayed
152 km WNW of Tobelo, Indonesia
4.2 mb 35.0 km 18:02:57.367 Δt 0 sn · 0 km · ΔM 0 Original record

This value summarises agreement between sources; it is not a measure of scientific accuracy. Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 U.S. Geological Survey (USGS) Earthquake Hazards Program — Public domain (U.S. Government)

Revision history

  1. 20.10.2026 22:10:05 · SISTEM · recompute

    depth: 12 → 35 latitude: 2.51 → 2.4707 longitude: 126.87 → 126.8562 magnitude: 3.9 → 4.2 time: 2026-10-20T18:02:58.000Z → 2026-10-20 18:02:57.367+00:00 source count: 1 → 2 review status: automatic → reviewed magnitude type: m → mb confirming sources: emsc → emsc,usgs preferred source: 3 → 4

  2. 20.10.2026 21:23:06 · EMSC · update

    magnitude: 3.7 → 3.9

  3. 20.10.2026 21:23:06 · SISTEM · recompute

    magnitude: 3.7 → 3.9

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