Updated 2025-08-05 17:05:20 UTC

M 8.2 — 2003 Tokachi-Oki Earthquake

Magnitude 8.2, depth 27.0 km, 2003-09-25 19:50:06 UTC.

MagnitudeM 8.2
Depth27.0 km
Felt reports—
Statusreviewed
TsunamiNo
Quake Pulse

What to know

A short factual reading of this event from the available observations.

  • Magnitude M 8.2 at 27.0 km depth.
Counts describe detected earthquakes and are not a forecast or hazard assessment.
Quake Pulse

Within the Quake Pulse database

Long-term comparisons are more robust at higher magnitudes because small-earthquake detection capability has changed over time.

Magnitude rank in database#17
M4.5+ within 250 km, ±15 days100
Sequence context105 events →
Remarkable

Why this event stands out

high magnitude · high USGS significance

75/100
Quake Pulse

Impact and context

Descriptive indicators available for this event and its surroundings.

59/100High context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)8.7
PAGER alertNot available
Tsunami indicator—
USGS significance1,024
Depth contextShallow
Nearby major city—
● Quake Pulse Alerts

Follow this area

Get an e-mail when a new earthquake matches your threshold.

Create an alert →

These indicators describe data available after detection. They are neither a forecast nor a direct estimate of damage or individual risk.

Quake Pulse

Around this epicenter

Nearby events observed around this epicenter. Spatial proximity does not necessarily mean they belong to the same sequence.

M 8.2 · 2003 Tokachi-Oki Earthquake · 100 kmInteractive 3D view of earthquakes within 100 km of M 8.2 · 2003 Tokachi-Oki Earthquake.M 8.2 · 2003 Tokachi-Oki EarthquakeM 4.8 · 131 km SE of Shizunai-furukawach?, Japan · 38.3 kmM 4.6 · 119 km S of Kushiro, Japan · 50.7 kmM 5.1 · 154 km S of Kushiro, Japan · 27.8 kmM 4.7 · 126 km SSE of Kushiro, Japan · 73.6 kmM 4.9 · 182 km S of Kushiro, Japan · 55.0 kmM 5.3 · 151 km S of Kushiro, Japan · 30.6 kmM 4.6 · 144 km SSW of Kushiro, Japan · 13.4 kmM 4.6 · 96 km SSE of Kushiro, Japan · 90.5 kmM 4.6 · Hokkaido, Japan region · 78.5 kmM 4.6 · 70 km S of Kushiro, Japan · 73.4 kmM 5.6 · 127 km ESE of Shizunai-furukawach?, Japan · 20.3 kmM 4.5 · 101 km S of Kushiro, Japan · 42.0 kmM 5.3 · 124 km S of Kushiro, Japan · 40.5 kmM 5.8 · 116 km S of Kushiro, Japan · 39.0 kmM 5.1 · 105 km SSE of Kushiro, Japan · 74.7 kmM 5.6 · 134 km SE of Shizunai-furukawach?, Japan · 50.8 kmM 5.8 · 88 km SSE of Kushiro, Japan · 77.9 kmM 4.9 · 82 km S of Kushiro, Japan · 56.4 kmM 5.9 · 87 km SSE of Kushiro, Japan · 81.1 kmM 4.6 · 133 km SSW of Kushiro, Japan · 9.8 kmM 5.2 · 61 km SSE of Kushiro, Japan · 94.8 kmM 4.9 · 86 km SSE of Kushiro, Japan · 81.2 kmM 5.5 · 85 km SSE of Kushiro, Japan · 75.6 kmM 4.9 · 122 km SSE of Kushiro, Japan · 77.0 kmM 4.8 · 80 km S of Kushiro, Japan · 55.7 kmM 4.5 · 111 km S of Kushiro, Japan · 57.9 kmM 4.5 · 116 km SSW of Kushiro, Japan · 20.4 kmM 4.6 · 95 km SSE of Obihiro, Japan · 40.8 kmM 4.8 · 105 km SSE of Kushiro, Japan · 76.3 kmM 4.6 · 98 km SSE of Kushiro, Japan · 70.9 kmM 4.8 · 109 km S of Kushiro, Japan · 51.0 kmM 4.8 · 96 km SSE of Kushiro, Japan · 87.6 kmM 5.1 · 98 km SSE of Kushiro, Japan · 95.0 kmM 4.8 · 42 km E of Shizunai-furukawach?, Japan · 99.2 kmM 4.6 · 63 km SE of Obihiro, Japan · 84.0 kmM 4.8 · 137 km SE of Shizunai-furukawach?, Japan · 58.5 kmM 5.2 · 102 km ESE of Shizunai-furukawach?, Japan · 38.9 kmM 4.7 · 171 km SE of Shizunai-furukawach?, Japan · 45.1 kmM 4.6 · 119 km S of Kushiro, Japan · 22.1 kmM 5.3 · 140 km SE of Shizunai-furukawach?, Japan · 61.6 kmM 4.8 · 131 km S of Kushiro, Japan · 47.1 kmM 5.4 · 107 km S of Kushiro, Japan · 45.9 kmM 4.5 · 104 km SSW of Kushiro, Japan · 30.7 kmM 4.9 · 175 km SE of Shizunai-furukawach?, Japan · 48.4 kmM 5.1 · 117 km SSE of Kushiro, Japan · 69.3 kmM 4.8 · 168 km S of Kushiro, Japan · 41.3 kmM 5.0 · 116 km SSE of Kushiro, Japan · 63.8 kmM 5.3 · 176 km S of Kushiro, Japan · 52.7 kmM 4.9 · 159 km SE of Shizunai-furukawach?, Japan · 40.4 kmM 4.9 · 163 km SE of Shizunai-furukawach?, Japan · 39.5 kmM 5.6 · 175 km S of Kushiro, Japan · 50.3 kmM 4.7 · 95 km SSE of Kushiro, Japan · 86.7 kmM 4.7 · 173 km SE of Shizunai-furukawach?, Japan · 46.8 kmM 4.7 · 61 km S of Kushiro, Japan · 83.4 kmM 5.5 · 103 km S of Kushiro, Japan · 45.6 kmM 4.5 · 50 km SSW of Kushiro, Japan · 84.4 kmM 4.7 · 76 km SSW of Kushiro, Japan · 61.1 kmM 5.4 · 74 km SSW of Kushiro, Japan · 64.1 kmM 6.5 · 58 km S of Kushiro, Japan · 80.5 kmM 4.5 · 117 km S of Kushiro, Japan · 23.2 kmM 5.1 · 101 km SSE of Kushiro, Japan · 73.5 kmM 4.8 · 116 km SSE of Kushiro, Japan · 71.2 kmM 4.6 · 123 km S of Kushiro, Japan · 45.7 kmM 4.8 · 114 km S of Kushiro, Japan · 56.5 kmM 4.5 · 111 km S of Kushiro, Japan · 56.9 kmM 5.2 · 74 km S of Obihiro, Japan · 71.5 kmM 5.0 · 95 km S of Kushiro, Japan · 64.2 kmM 5.3 · 40 km ESE of Shizunai-furukawach?, Japan · 99.8 kmM 5.0 · 82 km S of Kushiro, Japan · 60.1 kmM 4.8 · 110 km S of Kushiro, Japan · 60.7 kmM 4.8 · 131 km S of Kushiro, Japan · 39.6 kmM 4.8 · Hokkaido, Japan region · 29.1 kmM 4.8 · 122 km SSE of Kushiro, Japan · 72.5 kmM 4.9 · 142 km S of Kushiro, Japan · 24.7 kmM 4.8 · 130 km S of Kushiro, Japan · 18.2 kmM 4.8 · 106 km SSW of Kushiro, Japan · 28.9 kmM 4.7 · 124 km SSE of Kushiro, Japan · 66.9 kmM 4.8 · 109 km S of Kushiro, Japan · 55.2 kmM 6.0 · 110 km S of Kushiro, Japan · 58.4 kmM 4.5 · 140 km S of Kushiro, Japan · 20.6 kmM 4.7 · 97 km SSW of Kushiro, Japan · 37.1 kmM 5.9 · 94 km SSE of Kushiro, Japan · 73.4 kmM 5.3 · 103 km SSE of Kushiro, Japan · 74.7 kmM 5.2 · 137 km SE of Shizunai-furukawach?, Japan · 22.8 kmM 5.6 · 108 km S of Kushiro, Japan · 48.9 kmM 4.8 · 147 km S of Kushiro, Japan · 22.0 kmM 4.7 · 144 km S of Kushiro, Japan · 17.0 kmM 5.0 · 73 km SSE of Obihiro, Japan · 61.9 kmM 5.4 · 111 km SSE of Obihiro, Japan · 24.5 kmM 4.7 · 103 km SSE of Obihiro, Japan · 32.6 kmM 4.6 · 76 km SSE of Obihiro, Japan · 58.9 kmM 4.7 · 131 km S of Kushiro, Japan · 18.5 kmM 7.4 · 119 km ESE of Shizunai-furukawach?, Japan · 26.7 kmM 4.9 · 71 km SSW of Kushiro, Japan · 66.5 kmM 5.5 · 130 km S of Kushiro, Japan · 26.6 kmM 5.7 · 124 km ESE of Shizunai-furukawach?, Japan · 24.5 kmM 4.9 · 133 km ESE of Shizunai-furukawach?, Japan · 11.4 kmM 4.8 · 65 km SW of Kushiro, Japan · 81.6 kmM 4.7 · 108 km ESE of Shizunai-furukawach?, Japan · 34.4 kmM 5.6 · 122 km ESE of Shizunai-furukawach?, Japan · 18.6 km
M 8.2 · 2003 Tokachi-Oki Earthquake100 km100 Recent earthquakes

Descriptive map centered on the epicenter; it does not represent felt intensity or risk.

Sequence context

This event belongs to a sequence detected by Quake Pulse.

Open sequence →

Nearby events · 100 km

Quake Pulse

USGS data evolution

Earthquake parameters can be revised after first publication. This timeline shows versions retained by Quake Pulse.

Revisions1
Magnitude change+0.0M 8.2 → M 8.2
Depth change+0.0 km
Last update619591 min
2025-08-05 17:05:20 UTC2025-08-05 17:05:20 UTC

Explore related context

Putting this earthquake in context

An earthquake record can change after the first automatic publication as additional stations contribute data and analysts refine the solution.

Interpret the numbers

Magnitude, depth, felt reports and status describe different parts of the event. None of them alone predicts the consequences for a specific city.

Important limits

If the earthquake creates a safety concern, follow local authorities and official warning channels rather than relying on a public data website.

Read the methodology →

Blog

Latest from the blog

Guides, explainers and practical reading to go beyond the live data.

View all articles →