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Updated 2014-11-07 01:45:02 UTC

M 4.7 — 104 km E of Iwaki, Japan

Magnitude 4.7, depth 37.8 km, 2011-06-07 01:06:41 UTC.

MagnitudeM 4.7
Depth37.8 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 →
Quake Pulse

What to know

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

  • Magnitude M 4.7 at 37.8 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#83,655
Magnitude rank in country#6,890
M4.5+ within 250 km, ±15 days114
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Impact and context

Descriptive indicators available for this event and its surroundings.

10/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance340
Depth contextShallow
Nearby major cityTokyo254 km · 14,000,000

Nearby major city

Tokyo254 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 4.7 · 104 km E of Iwaki, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 4.7 · 104 km E of Iwaki, Japan.M 4.7 · 104 km E of Iwaki, JapanM 4.5 · 91 km NE of Hasaki, Japan · 85.3 kmM 5.7 · 89 km ESE of Takahagi, Japan · 74.0 kmM 4.6 · 157 km E of Namie, Japan · 85.0 kmM 4.5 · 130 km ESE of Iwaki, Japan · 36.5 kmM 4.6 · 75 km ENE of Namie, Japan · 80.3 kmM 4.5 · 32 km ESE of Namie, Japan · 79.4 kmM 4.9 · 39 km ESE of Namie, Japan · 72.2 kmM 4.7 · 135 km ESE of Namie, Japan · 36.7 kmM 4.6 · 143 km ESE of Namie, Japan · 57.9 kmM 4.7 · 79 km ESE of Kitaibaraki, Japan · 54.4 kmM 4.6 · 126 km ESE of Namie, Japan · 40.7 kmM 4.8 · 177 km ESE of Iwaki, Japan · 82.3 kmM 4.5 · 114 km ESE of Iwaki, Japan · 16.0 kmM 4.7 · 129 km ESE of Namie, Japan · 30.9 kmM 4.5 · 12 km E of Iwaki, Japan · 92.2 kmM 4.7 · 28 km NE of Iwaki, Japan · 86.7 kmM 4.5 · 123 km ENE of Hasaki, Japan · 77.9 kmM 4.9 · 96 km NE of Hasaki, Japan · 84.3 kmM 4.6 · 139 km ENE of Hasaki, Japan · 85.3 kmM 4.6 · 38 km E of Iwaki, Japan · 65.5 kmM 4.7 · 20 km SSE of Iwaki, Japan · 94.5 kmM 4.9 · 58 km ESE of Kitaibaraki, Japan · 65.9 kmM 4.5 · 27 km E of Iwaki, Japan · 76.8 kmM 5.7 · 61 km ENE of Namie, Japan · 87.1 kmM 4.7 · 115 km ENE of Hasaki, Japan · 87.8 kmM 4.9 · 103 km ESE of Iwaki, Japan · 28.8 kmM 4.5 · 120 km ESE of Iwaki, Japan · 29.5 kmM 4.9 · 83 km NE of Hasaki, Japan · 94.5 kmM 4.7 · 138 km ESE of Iwaki, Japan · 44.8 kmM 4.5 · 39 km E of Iwaki, Japan · 65.8 kmM 4.6 · 151 km E of Namie, Japan · 91.0 kmM 4.8 · 118 km ESE of Iwaki, Japan · 28.2 kmM 4.8 · 87 km NE of Hasaki, Japan · 91.1 kmM 5.0 · 104 km ESE of Namie, Japan · 36.8 kmM 4.6 · 61 km E of Namie, Japan · 59.7 kmM 4.8 · 156 km ESE of Kitaibaraki, Japan · 72.8 kmM 4.5 · 50 km SE of Namie, Japan · 60.3 kmM 4.9 · 155 km E of Namie, Japan · 84.8 kmM 4.6 · 93 km ESE of Iwaki, Japan · 19.9 kmM 4.8 · 172 km ESE of Iwaki, Japan · 75.0 kmM 4.8 · 166 km ESE of Iwaki, Japan · 65.4 kmM 5.0 · 123 km ENE of Hasaki, Japan · 72.9 kmM 4.7 · 133 km ENE of Hasaki, Japan · 71.3 kmM 4.6 · 50 km ESE of Hitachi, Japan · 96.3 kmM 4.6 · 63 km ESE of Takahagi, Japan · 74.6 kmM 4.5 · 53 km E of Namie, Japan · 64.8 kmM 4.7 · 123 km ESE of Kitaibaraki, Japan · 58.1 kmM 4.6 · 172 km ESE of Iwaki, Japan · 80.2 kmM 4.7 · 32 km E of Kitaibaraki, Japan · 85.7 kmM 4.9 · 53 km ENE of Namie, Japan · 82.5 kmM 4.7 · 85 km ENE of Namie, Japan · 80.6 kmM 4.7 · 137 km ESE of Namie, Japan · 34.7 kmM 4.6 · 50 km SE of Namie, Japan · 60.5 kmM 5.1 · 36 km E of Namie, Japan · 78.8 kmM 4.7 · 104 km SE of Ishinomaki, Japan · 99.8 kmM 5.3 · 153 km ESE of Namie, Japan · 59.1 kmM 4.8 · 98 km SE of Ishinomaki, Japan · 93.8 kmM 4.5 · 33 km ESE of Takahagi, Japan · 94.2 kmM 4.6 · 50 km SE of Namie, Japan · 60.1 kmM 4.8 · 194 km ESE of Iwaki, Japan · 93.4 kmM 4.8 · 131 km ESE of Namie, Japan · 37.0 kmM 4.8 · 14 km ESE of Namie, Japan · 96.2 kmM 4.7 · 146 km E of Namie, Japan · 72.8 kmM 5.1 · 145 km E of Namie, Japan · 60.3 kmM 5.1 · 127 km ESE of Namie, Japan · 28.3 kmM 4.7 · 124 km ESE of Iwaki, Japan · 23.9 kmM 5.0 · 40 km ENE of Namie, Japan · 99.0 kmM 4.6 · 13 km ESE of Namie, Japan · 97.2 kmM 4.7 · 157 km ESE of Namie, Japan · 60.1 kmM 4.5 · 66 km ESE of Namie, Japan · 47.2 kmM 4.6 · 63 km ESE of Namie, Japan · 52.9 kmM 6.1 · 31 km ESE of Namie, Japan · 80.4 kmM 4.6 · 98 km E of Iwaki, Japan · 10.8 kmM 5.2 · 135 km ENE of Hasaki, Japan · 95.7 kmM 4.8 · 169 km ENE of Hasaki, Japan · 87.3 kmM 4.7 · 108 km ESE of Iwaki, Japan · 24.8 kmM 5.0 · 103 km ENE of Hasaki, Japan · 93.7 kmM 4.7 · 108 km ENE of Hasaki, Japan · 92.2 kmM 5.1 · 89 km NE of Hasaki, Japan · 87.8 kmM 4.8 · 42 km ENE of Namie, Japan · 95.2 kmM 4.5 · 8 km E of Iwaki, Japan · 95.8 km
M 4.7 · 104 km E of Iwaki, Japan100 km81 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 4.591 km NE of Hasaki, Japan85.3 km · 2011-07-06 17:02:21 UTCM 5.789 km ESE of Takahagi, Japan74.0 km · 2011-07-06 15:14:59 UTCM 4.6157 km E of Namie, Japan85.0 km · 2011-07-06 00:29:01 UTCM 4.5130 km ESE of Iwaki, Japan36.5 km · 2011-07-03 16:17:56 UTCM 4.675 km ENE of Namie, Japan80.3 km · 2011-07-01 04:19:50 UTCM 4.532 km ESE of Namie, Japan79.4 km · 2011-06-30 16:20:40 UTCM 4.939 km ESE of Namie, Japan72.2 km · 2011-06-30 10:22:44 UTCM 4.7135 km ESE of Namie, Japan36.7 km · 2011-06-29 20:09:46 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 4.7 → M 4.7
Depth change+0.0 km
Last update6272143 min
2014-11-07 01:45:02 UTC2014-11-07 01:45:02 UTC

Explore related context

Related or nearby earthquakes

M 4.4 · 90 km ESE of Tomioka, Japan12 km · 2026-08-23 00:32:24 UTCM 4.5 · 90 km E of Tomioka, Japan29 km · 2026-05-08 20:11:23 UTCM 4.5 · 109 km E of Tomioka, Japan32 km · 2026-09-14 07:33:04 UTCM 4.7 · 77 km E of Tomioka, Japan39 km · 2026-08-25 20:23:36 UTC

Geographic context

CountryJapan →Nearby cityIwaki →

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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.

Read the methodology →

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