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Updated 2025-12-22 15:19:50 UTC

M 5.4 — 96 km ESE of Iwaki, Japan

Magnitude 5.4, depth 16.9 km, 2011-07-29 14:53:18 UTC.

MagnitudeM 5.4
Depth16.9 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 5.4 at 16.9 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#13,234
Magnitude rank in country#1,073
M4.5+ within 250 km, ±15 days82
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Impact and context

Descriptive indicators available for this event and its surroundings.

21/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance449
Depth contextShallow
Nearby major cityTokyo226 km · 14,000,000

Nearby major city

Tokyo226 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 5.4 · 96 km ESE of Iwaki, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 5.4 · 96 km ESE of Iwaki, Japan.M 5.4 · 96 km ESE of Iwaki, JapanM 4.9 · 19 km E of Iwaki, Japan · 80.3 kmM 4.6 · 42 km SE of Iwaki, Japan · 56.3 kmM 4.7 · 34 km E of Iwaki, Japan · 66.3 kmM 4.5 · 107 km ESE of Takahagi, Japan · 33.4 kmM 4.6 · 130 km E of Iwaki, Japan · 53.0 kmM 4.5 · 86 km ESE of Iwaki, Japan · 12.2 kmM 4.5 · 24 km E of Kitaibaraki, Japan · 78.0 kmM 4.5 · 109 km ENE of Hasaki, Japan · 76.5 kmM 4.6 · 112 km ENE of Hasaki, Japan · 58.6 kmM 4.7 · 97 km ENE of Hasaki, Japan · 55.0 kmM 4.9 · 96 km ENE of Hasaki, Japan · 76.1 kmM 5.9 · 86 km ENE of Hasaki, Japan · 69.3 kmM 4.7 · 102 km ENE of Hasaki, Japan · 71.8 kmM 4.7 · 19 km E of Iwaki, Japan · 80.0 kmM 4.9 · 104 km ENE of Hasaki, Japan · 48.9 kmM 4.6 · 115 km ENE of Hasaki, Japan · 70.8 kmM 4.5 · 126 km ENE of Hasaki, Japan · 71.1 kmM 4.6 · 96 km ESE of Namie, Japan · 59.0 kmM 4.7 · 42 km E of Iwaki, Japan · 61.9 kmM 4.8 · 22 km E of Iwaki, Japan · 77.4 kmM 4.6 · 134 km ESE of Iwaki, Japan · 40.5 kmM 5.8 · 1 km SSE of Iwaki, Japan · 95.1 kmM 4.5 · 140 km E of Iwaki, Japan · 52.3 kmM 4.7 · 139 km ENE of Hasaki, Japan · 81.0 kmM 4.7 · 54 km E of ?arai, Japan · 80.2 kmM 4.8 · 60 km ENE of Kashima-shi, Japan · 79.1 kmM 4.9 · 146 km ESE of Iwaki, Japan · 49.5 kmM 4.6 · 36 km E of Namie, Japan · 93.0 kmM 4.9 · 107 km ESE of Takahagi, Japan · 39.3 kmM 4.5 · 28 km ENE of Iwaki, Japan · 80.2 kmM 4.5 · 37 km ENE of Iwaki, Japan · 72.7 kmM 4.6 · 31 km SE of Iwaki, Japan · 68.1 kmM 4.7 · 78 km ESE of Iwaki, Japan · 18.5 kmM 4.5 · 21 km ESE of Kitaibaraki, Japan · 79.5 kmM 6.3 · 13 km SSE of Iwaki, Japan · 86.3 kmM 4.8 · 133 km ENE of Hasaki, Japan · 76.7 kmM 4.9 · 100 km ESE of Iwaki, Japan · 8.8 kmM 4.5 · 40 km ESE of ?arai, Japan · 93.9 kmM 4.5 · 85 km E of ?arai, Japan · 52.6 kmM 4.8 · 83 km ESE of Iwaki, Japan · 14.3 kmM 4.6 · 41 km NE of Hasaki, Japan · 99.5 kmM 5.2 · 52 km ESE of Namie, Japan · 81.8 kmM 4.7 · 87 km E of Namie, Japan · 84.1 kmM 4.7 · 20 km E of Iwaki, Japan · 79.4 kmM 4.5 · 147 km ESE of Iwaki, Japan · 54.9 kmM 4.5 · 136 km ESE of Iwaki, Japan · 43.6 kmM 4.6 · 144 km ESE of Iwaki, Japan · 50.9 kmM 4.7 · 145 km ESE of Iwaki, Japan · 51.6 kmM 5.0 · near the east coast of Honshu, Japan · 70.9 kmM 4.7 · 130 km E of Namie, Japan · 89.8 kmM 4.6 · 142 km ESE of Namie, Japan · 66.2 kmM 4.7 · 128 km ESE of Iwaki, Japan · 36.0 kmM 4.7 · 64 km E of ?arai, Japan · 73.3 kmM 4.5 · 169 km ENE of Hasaki, Japan · 77.8 kmM 4.5 · 91 km NE of Hasaki, Japan · 53.1 kmM 5.7 · 89 km ESE of Takahagi, Japan · 41.9 kmM 4.5 · 130 km ESE of Iwaki, Japan · 35.5 kmM 4.5 · 32 km ESE of Namie, Japan · 90.2 kmM 4.9 · 39 km ESE of Namie, Japan · 84.2 kmM 4.7 · 135 km ESE of Namie, Japan · 64.9 kmM 4.6 · 143 km ESE of Namie, Japan · 87.7 km
M 5.4 · 96 km ESE of Iwaki, Japan100 km61 Recent earthquakes

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

Sequence context

No public sequence is currently associated with this event.

Nearby events · 100 km

M 4.919 km E of Iwaki, Japan80.3 km · 2011-08-27 14:29:27 UTCM 4.642 km SE of Iwaki, Japan56.3 km · 2011-08-27 07:17:44 UTCM 4.734 km E of Iwaki, Japan66.3 km · 2011-08-27 00:16:40 UTCM 4.5107 km ESE of Takahagi, Japan33.4 km · 2011-08-24 18:25:02 UTCM 4.6130 km E of Iwaki, Japan53.0 km · 2011-08-23 23:32:54 UTCM 4.586 km ESE of Iwaki, Japan12.2 km · 2011-08-23 14:56:21 UTCM 4.524 km E of Kitaibaraki, Japan78.0 km · 2011-08-23 08:27:20 UTCM 4.5109 km ENE of Hasaki, Japan76.5 km · 2011-08-22 19:24:26 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 5.4 → M 5.4
Depth change+0.0 km
Last update420609 min
2025-12-22 15:19:50 UTC2025-12-22 15:19:50 UTC

Explore related context

Related or nearby earthquakes

M 4.4 · 90 km ESE of Tomioka, Japan29 km · 2026-08-23 00:32:24 UTCM 4.5 · 90 km E of Tomioka, Japan59 km · 2026-05-08 20:11:23 UTCM 4.5 · 37 km ESE of Iwaki, Japan60 km · 2026-10-07 00:22:41 UTCM 4.5 · 109 km E of Tomioka, Japan64 km · 2026-09-14 07:33:04 UTC

Geographic context

CountryJapan →Nearby cityIwaki →

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Putting this earthquake in context

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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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