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Updated 2025-12-22 16:12:26 UTC

M 5.0 — 208 km ESE of Iwaki, Japan

Magnitude 5.0, depth 36.9 km, 2011-03-21 19:01:19 UTC.

MagnitudeM 5.0
Depth36.9 km
Felt reports—
Statusreviewed
TsunamiNo

Japan → · Iwaki →

Quake Pulse Activity Index

Activity trend

A high index means recent activity is high relative to the selected historical baseline. It does not mean that a larger earthquake is about to occur.

Quake Pulse Activity Index51/100Normal
Current 30 days42
Historical monthly median41.5
Historical percentileP51
M5+ in 30 days9
M6+ in 30 days1
Activity trendaround the historical range (+1%)
Baseline months: 60Last calculation: 2026-09-03 06:17:39How the index works →
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What to know

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

  • Magnitude M 5.0 at 36.9 km depth.
Counts describe detected earthquakes and are not a forecast or hazard assessment.
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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#36,815
Magnitude rank in country#2,807
M4.5+ within 250 km, ±15 days1,613
Sequence context1168 events →
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Impact and context

Descriptive indicators available for this event and its surroundings.

15/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance385
Depth contextShallow
Nearby major cityTokyo333 km · 14,000,000

Nearby major city

Tokyo333 km · 14,000,000

Displayed population is the indexed city population, not an estimate of people exposed.

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

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Around this epicenter

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

50 km100 km250 km
M 5.0 · 208 km ESE of Iwaki, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 5.0 · 208 km ESE of Iwaki, Japan.M 5.0 · 208 km ESE of Iwaki, JapanM 4.5 · 157 km ESE of Iwaki, Japan · 68.4 kmM 5.0 · 223 km E of Namie, Japan · 62.6 kmM 4.6 · 233 km E of Namie, Japan · 64.0 kmM 5.5 · 267 km ESE of Namie, Japan · 69.3 kmM 5.0 · 128 km ESE of Namie, Japan · 90.1 kmM 4.8 · 163 km ESE of Iwaki, Japan · 61.9 kmM 4.7 · 168 km ESE of Iwaki, Japan · 53.4 kmM 4.7 · 129 km ESE of Namie, Japan · 84.0 kmM 4.5 · 186 km E of Namie, Japan · 90.5 kmM 4.5 · off the east coast of Honshu, Japan · 71.7 kmM 4.5 · 265 km ESE of Namie, Japan · 76.9 kmM 4.6 · 118 km ESE of Namie, Japan · 96.9 kmM 4.7 · 224 km ESE of Namie, Japan · 35.9 kmM 4.8 · 211 km ESE of Iwaki, Japan · 5.0 kmM 4.6 · 227 km E of Namie, Japan · 58.3 kmM 4.7 · 119 km ESE of Iwaki, Japan · 93.0 kmM 4.6 · 186 km ESE of Iwaki, Japan · 26.5 kmM 4.6 · 232 km ESE of Iwaki, Japan · 33.7 kmM 4.6 · 245 km E of Namie, Japan · 93.4 kmM 4.7 · 112 km ESE of Iwaki, Japan · 98.8 kmM 4.5 · 147 km ESE of Iwaki, Japan · 66.0 kmM 4.9 · 224 km ESE of Iwaki, Japan · 16.4 kmM 4.6 · 183 km E of Namie, Japan · 64.7 kmM 4.7 · 133 km ESE of Iwaki, Japan · 76.9 kmM 5.1 · 116 km ESE of Iwaki, Japan · 92.8 kmM 4.8 · 130 km ESE of Namie, Japan · 85.9 kmM 4.5 · 267 km ESE of Namie, Japan · 73.1 kmM 4.9 · 110 km ESE of Iwaki, Japan · 98.3 kmM 4.6 · 227 km E of Namie, Japan · 85.7 kmM 4.5 · 234 km E of Hasaki, Japan · 71.2 kmM 4.5 · 234 km E of Hasaki, Japan · 72.5 kmM 4.5 · 135 km E of Iwaki, Japan · 74.3 kmM 4.8 · 221 km ESE of Namie, Japan · 37.7 kmM 4.8 · 225 km ESE of Namie, Japan · 40.8 kmM 4.7 · 276 km ESE of Namie, Japan · 76.8 kmM 4.5 · 122 km E of Iwaki, Japan · 86.2 kmM 4.5 · 239 km E of Hasaki, Japan · 69.6 kmM 4.9 · 270 km E of Namie, Japan · 93.0 kmM 4.6 · 154 km ENE of Hasaki, Japan · 84.9 kmM 4.6 · 143 km ENE of Hasaki, Japan · 99.4 kmM 5.7 · 154 km ENE of Hasaki, Japan · 87.6 kmM 4.8 · 138 km E of Namie, Japan · 87.6 kmM 4.5 · 172 km ESE of Namie, Japan · 42.6 kmM 4.5 · 135 km ESE of Namie, Japan · 86.1 kmM 4.7 · 273 km E of Namie, Japan · 97.8 kmM 4.7 · 144 km ESE of Namie, Japan · 75.3 kmM 4.5 · 140 km E of Namie, Japan · 87.8 kmM 4.6 · 141 km E of Namie, Japan · 94.0 kmM 4.5 · 138 km E of Iwaki, Japan · 72.5 kmM 4.5 · 215 km E of Iwaki, Japan · 11.6 kmM 4.5 · 136 km ESE of Iwaki, Japan · 77.9 kmM 4.5 · 251 km E of Namie, Japan · 76.9 kmM 4.8 · 273 km E of Namie, Japan · 90.8 kmM 4.5 · 274 km E of Namie, Japan · 92.6 kmM 4.5 · 186 km ESE of Iwaki, Japan · 21.7 kmM 4.5 · 275 km E of Iwaki, Japan · 68.1 kmM 4.5 · 157 km ENE of Hasaki, Japan · 78.8 kmM 4.7 · 193 km ESE of Namie, Japan · 42.9 kmM 5.1 · 211 km ESE of Namie, Japan · 32.5 kmM 4.5 · 199 km ENE of Hasaki, Japan · 49.9 kmM 4.9 · 216 km ESE of Namie, Japan · 31.9 kmM 4.7 · 134 km E of Namie, Japan · 92.0 kmM 4.6 · 226 km ESE of Namie, Japan · 35.5 kmM 4.8 · 244 km E of Iwaki, Japan · 38.6 kmM 4.7 · 129 km E of Namie, Japan · 94.4 kmM 4.7 · 177 km ENE of Hasaki, Japan · 60.8 kmM 4.6 · 134 km ESE of Namie, Japan · 80.4 kmM 4.9 · 169 km ENE of Hasaki, Japan · 71.1 kmM 4.9 · 165 km ENE of Hasaki, Japan · 71.7 kmM 4.6 · 212 km ESE of Iwaki, Japan · 37.6 kmM 4.8 · 168 km ENE of Hasaki, Japan · 73.9 kmM 4.9 · 168 km ENE of Hasaki, Japan · 70.7 kmM 4.6 · 255 km ESE of Namie, Japan · 63.7 kmM 4.5 · 268 km E of Namie, Japan · 84.0 kmM 4.6 · 160 km ENE of Hasaki, Japan · 86.2 kmM 4.6 · 168 km ENE of Hasaki, Japan · 74.8 kmM 4.7 · 246 km ESE of Namie, Japan · 43.8 kmM 4.8 · 294 km ESE of Iwaki, Japan · 86.2 kmM 4.7 · 121 km E of Iwaki, Japan · 88.8 kmM 4.8 · 246 km E of Namie, Japan · 90.4 kmM 4.9 · 247 km E of Namie, Japan · 93.9 kmM 4.8 · 198 km ESE of Iwaki, Japan · 45.9 kmM 4.6 · 232 km E of Hasaki, Japan · 76.0 kmM 4.6 · 245 km ESE of Iwaki, Japan · 49.1 kmM 4.8 · 164 km E of Namie, Japan · 78.0 kmM 4.5 · 256 km E of Iwaki, Japan · 47.8 kmM 4.8 · 245 km E of Namie, Japan · 78.7 kmM 4.6 · 159 km ENE of Hasaki, Japan · 78.7 kmM 4.9 · 127 km E of Iwaki, Japan · 82.5 kmM 4.5 · 226 km ENE of Hasaki, Japan · 50.1 kmM 4.8 · 203 km E of Iwaki, Japan · 16.0 kmM 4.5 · 216 km ESE of Iwaki, Japan · 11.8 kmM 5.1 · 268 km E of Namie, Japan · 83.2 kmM 4.6 · 201 km ESE of Iwaki, Japan · 7.8 kmM 5.6 · 206 km ESE of Namie, Japan · 20.5 kmM 4.6 · 233 km ESE of Namie, Japan · 44.8 kmM 4.7 · 259 km E of Namie, Japan · 76.5 kmM 4.5 · 270 km ESE of Namie, Japan · 78.0 kmM 4.9 · 263 km ESE of Namie, Japan · 71.5 kmM 4.5 · 286 km ESE of Namie, Japan · 92.3 km
M 5.0 · 208 km ESE of Iwaki, Japan100 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

M 4.5157 km ESE of Iwaki, Japan68.4 km · 2011-04-20 07:40:33 UTCM 5.0223 km E of Namie, Japan62.6 km · 2011-04-19 04:04:30 UTCM 4.6233 km E of Namie, Japan64.0 km · 2011-04-18 03:53:40 UTCM 5.5267 km ESE of Namie, Japan69.3 km · 2011-04-16 20:36:46 UTCM 5.0128 km ESE of Namie, Japan90.1 km · 2011-04-15 21:10:37 UTCM 4.8163 km ESE of Iwaki, Japan61.9 km · 2011-04-15 00:56:27 UTCM 4.7168 km ESE of Iwaki, Japan53.4 km · 2011-04-13 22:05:07 UTCM 4.7129 km ESE of Namie, Japan84.0 km · 2011-04-13 05:41:05 UTC
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USGS data evolution

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

Revisions1
Magnitude change+0.0M 5.0 → M 5.0
Depth change+0.0 km
Last update420366 min
2025-12-22 16:12:26 UTC2025-12-22 16:12:26 UTC

Explore related context

Related or nearby earthquakes

M 4.5 · 256 km ESE of Tomioka, Japan63 km · 2026-05-12 05:33:00 UTCM 4.5 · 109 km E of Tomioka, Japan101 km · 2026-09-14 07:33:04 UTCM 4.4 · 90 km ESE of Tomioka, Japan116 km · 2026-08-23 00:32:24 UTCM 4.5 · 90 km E of Tomioka, Japan118 km · 2026-05-08 20:11:23 UTC

Geographic context

CountryJapan →Nearby cityIwaki →Seismic sequenceM 5.0 →

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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.

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