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Updated 2022-05-09 19:15:29 UTC

M 6.6 — 133 km ENE of Hasaki, Japan

Magnitude 6.6, depth 16.0 km, 2011-03-11 06:18:49 UTC.

MagnitudeM 6.6
Depth16.0 km
Felt reports—
Statusreviewed
TsunamiNo

Japan → · Hasaki →

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 6.6 at 16.0 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#783
Magnitude rank in country#67
M4.5+ within 250 km, ±15 days1,187
Sequence context1253 events →
Remarkable

Why this event stands out

high magnitude

48/100
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Impact and context

Descriptive indicators available for this event and its surroundings.

39/100Moderate context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance670
Depth contextShallow
Nearby major cityTokyo236 km · 14,000,000

Nearby major city

Tokyo236 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 6.6 · 133 km ENE of Hasaki, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 6.6 · 133 km ENE of Hasaki, Japan.M 6.6 · 133 km ENE of Hasaki, JapanM 4.8 · 61 km E of Hasaki, Japan · 73.8 kmM 4.5 · 100 km ENE of Hasaki, Japan · 50.4 kmM 5.1 · 109 km ESE of Iwaki, Japan · 83.2 kmM 4.7 · 119 km ESE of Iwaki, Japan · 73.8 kmM 4.6 · 186 km ESE of Iwaki, Japan · 85.3 kmM 4.6 · 75 km ESE of Kitaibaraki, Japan · 88.8 kmM 4.7 · 110 km ESE of Iwaki, Japan · 78.3 kmM 4.5 · near the east coast of Honshu, Japan · 58.0 kmM 4.7 · 112 km ESE of Iwaki, Japan · 78.9 kmM 4.5 · 113 km ESE of Takahagi, Japan · 51.5 kmM 4.8 · 192 km E of Hasaki, Japan · 87.7 kmM 4.5 · 147 km ESE of Iwaki, Japan · 67.3 kmM 4.5 · 52 km NE of Hasaki, Japan · 86.3 kmM 4.7 · 133 km ESE of Iwaki, Japan · 74.0 kmM 5.1 · 116 km ESE of Iwaki, Japan · 83.0 kmM 4.8 · 193 km E of Hasaki, Japan · 87.6 kmM 4.6 · near the east coast of Honshu, Japan · 52.3 kmM 4.9 · 110 km ESE of Iwaki, Japan · 85.4 kmM 4.6 · 93 km NE of Hasaki, Japan · 58.7 kmM 4.5 · 194 km E of Hasaki, Japan · 91.4 kmM 4.5 · 135 km E of Iwaki, Japan · 98.8 kmM 5.3 · 81 km NE of Hasaki, Japan · 72.9 kmM 5.1 · 91 km ESE of Iwaki, Japan · 87.4 kmM 4.5 · 122 km E of Iwaki, Japan · 92.6 kmM 4.7 · 78 km ESE of Iwaki, Japan · 98.5 kmM 4.6 · 154 km ENE of Hasaki, Japan · 24.9 kmM 4.6 · 143 km ENE of Hasaki, Japan · 10.2 kmM 4.6 · 34 km E of Hasaki, Japan · 99.4 kmM 4.7 · 140 km ENE of Hasaki, Japan · 9.1 kmM 5.7 · 154 km ENE of Hasaki, Japan · 22.0 kmM 4.6 · 63 km ENE of Hasaki, Japan · 74.6 kmM 4.6 · 100 km ESE of Iwaki, Japan · 79.9 kmM 4.5 · 106 km ENE of Hasaki, Japan · 49.0 kmM 5.2 · 99 km ESE of Takahagi, Japan · 61.0 kmM 4.6 · 112 km ENE of Hasaki, Japan · 39.4 kmM 4.5 · 136 km ESE of Iwaki, Japan · 64.4 kmM 4.5 · 186 km ESE of Iwaki, Japan · 98.1 kmM 4.6 · off the east coast of Honshu, Japan · 28.1 kmM 4.7 · 76 km ESE of Iwaki, Japan · 96.2 kmM 4.5 · 157 km ENE of Hasaki, Japan · 34.2 kmM 4.8 · 76 km E of ?arai, Japan · 79.4 kmM 4.5 · 199 km ENE of Hasaki, Japan · 66.9 kmM 4.7 · 177 km ENE of Hasaki, Japan · 48.8 kmM 4.6 · 131 km ENE of Hasaki, Japan · 23.6 kmM 4.9 · 169 km ENE of Hasaki, Japan · 38.5 kmM 4.9 · 165 km ENE of Hasaki, Japan · 38.7 kmM 4.6 · 212 km ESE of Iwaki, Japan · 83.0 kmM 4.8 · 168 km ENE of Hasaki, Japan · 36.5 kmM 4.9 · 168 km ENE of Hasaki, Japan · 38.9 kmM 4.6 · 160 km ENE of Hasaki, Japan · 26.6 kmM 4.6 · 168 km ENE of Hasaki, Japan · 36.3 kmM 5.0 · 90 km ENE of Hasaki, Japan · 53.5 kmM 4.8 · 198 km ESE of Iwaki, Japan · 67.2 kmM 4.7 · 95 km ESE of Kitaibaraki, Japan · 75.8 kmM 4.5 · 92 km E of Hasaki, Japan · 49.8 kmM 4.6 · 159 km ENE of Hasaki, Japan · 31.5 kmM 4.7 · 123 km E of Hasaki, Japan · 23.0 kmM 4.5 · 226 km ENE of Hasaki, Japan · 92.4 kmM 4.9 · 79 km NE of Hasaki, Japan · 75.5 kmM 4.9 · 83 km E of Hasaki, Japan · 67.5 kmM 5.3 · 72 km E of Hasaki, Japan · 68.5 kmM 5.1 · 69 km E of Hasaki, Japan · 67.5 kmM 4.7 · 83 km E of Hasaki, Japan · 58.2 kmM 5.6 · 66 km E of Hasaki, Japan · 68.5 kmM 5.9 · 65 km E of Hasaki, Japan · 69.6 kmM 5.7 · 73 km E of ?arai, Japan · 83.1 kmM 4.5 · 83 km ENE of Hasaki, Japan · 59.1 kmM 4.6 · 91 km E of Hasaki, Japan · 61.7 kmM 4.7 · 56 km ENE of Hasaki, Japan · 81.0 kmM 4.8 · 99 km ESE of Hasaki, Japan · 79.9 kmM 4.8 · 154 km ESE of Iwaki, Japan · 56.2 kmM 4.9 · 145 km ESE of Iwaki, Japan · 74.4 kmM 5.1 · 68 km E of Hasaki, Japan · 71.6 kmM 4.6 · 153 km ESE of Iwaki, Japan · 53.5 kmM 5.0 · 94 km ENE of Hasaki, Japan · 42.2 kmM 4.8 · 144 km E of Hasaki, Japan · 11.9 kmM 4.9 · 79 km ESE of Takahagi, Japan · 81.2 kmM 4.6 · 207 km ENE of Hasaki, Japan · 74.0 kmM 5.0 · 121 km ENE of Hasaki, Japan · 34.2 kmM 4.9 · 76 km NE of Hasaki, Japan · 74.8 kmM 4.8 · 100 km ESE of Iwaki, Japan · 84.8 kmM 4.9 · 91 km ESE of Iwaki, Japan · 98.7 kmM 4.6 · 86 km E of ?arai, Japan · 70.0 kmM 4.8 · 109 km ENE of Hasaki, Japan · 41.5 kmM 4.6 · 165 km ENE of Hasaki, Japan · 35.1 kmM 4.8 · 103 km ENE of Hasaki, Japan · 49.9 kmM 4.6 · 112 km E of Hasaki, Japan · 46.0 kmM 5.2 · near the east coast of Honshu, Japan · 48.2 kmM 4.5 · 225 km ENE of Hasaki, Japan · 91.9 kmM 4.6 · 161 km ESE of Iwaki, Japan · 43.0 kmM 4.7 · 220 km ESE of Iwaki, Japan · 92.6 kmM 4.6 · 103 km ESE of Iwaki, Japan · 94.5 kmM 4.7 · 61 km E of ?arai, Japan · 94.3 kmM 4.7 · 131 km ENE of Hasaki, Japan · 35.4 kmM 4.6 · 114 km ESE of Takahagi, Japan · 50.6 kmM 4.7 · 86 km ENE of Hasaki, Japan · 47.3 kmM 4.9 · 50 km ENE of Kashima-shi, Japan · 98.8 kmM 4.5 · 116 km ESE of Kitaibaraki, Japan · 53.9 kmM 5.0 · 172 km ESE of Iwaki, Japan · 61.7 kmM 4.5 · 83 km E of Hasaki, Japan · 59.8 km
M 6.6 · 133 km ENE of Hasaki, 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 4.861 km E of Hasaki, Japan73.8 km · 2011-04-10 00:00:56 UTCM 4.5100 km ENE of Hasaki, Japan50.4 km · 2011-04-09 14:53:28 UTCM 5.1109 km ESE of Iwaki, Japan83.2 km · 2011-04-09 01:25:26 UTCM 4.7119 km ESE of Iwaki, Japan73.8 km · 2011-04-08 00:56:24 UTCM 4.6186 km ESE of Iwaki, Japan85.3 km · 2011-04-07 21:13:37 UTCM 4.675 km ESE of Kitaibaraki, Japan88.8 km · 2011-04-07 20:17:31 UTCM 4.7110 km ESE of Iwaki, Japan78.3 km · 2011-04-07 19:11:14 UTCM 4.5near the east coast of Honshu, Japan58.0 km · 2011-04-07 01:12:57 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 6.6 → M 6.6
Depth change+0.0 km
Last update2325150 min
2022-05-09 19:15:29 UTC2022-05-09 19:15:29 UTC

Explore related context

Related or nearby earthquakes

M 4.9 · 83 km ENE of Hasaki, Japan50 km · 2026-05-01 13:00:39 UTCM 4.4 · 90 km ESE of Tomioka, Japan108 km · 2026-08-23 00:32:24 UTCM 4.7 · 16 km ENE of Hasaki, Japan117 km · 2026-08-29 15:17:06 UTCM 4.5 · 109 km E of Tomioka, Japan129 km · 2026-09-14 07:33:04 UTC

Geographic context

CountryJapan →Nearby cityHasaki →Seismic sequenceM 6.6 →

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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.

Read the methodology →

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