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Updated 2014-11-07 01:43:59 UTC

M 4.9 — 145 km SE of Kamaishi, Japan

Magnitude 4.9, depth 10.0 km, 2011-03-11 20:58:46 UTC.

MagnitudeM 4.9
Depth10.0 km
Felt reports—
Statusreviewed
TsunamiNo

Japan → · Kamaishi →

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 4.9 at 10.0 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#48,165
Magnitude rank in country#3,635
M4.5+ within 250 km, ±15 days1,356
Sequence context1008 events →
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Impact and context

Descriptive indicators available for this event and its surroundings.

13/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance369
Depth contextShallow
Nearby major cityTokyo449 km · 14,000,000

Nearby major city

Tokyo449 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 4.9 · 145 km SE of Kamaishi, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 4.9 · 145 km SE of Kamaishi, Japan.M 4.9 · 145 km SE of Kamaishi, JapanM 4.6 · 214 km ESE of Ishinomaki, Japan · 98.5 kmM 4.7 · 139 km SE of ?funato, Japan · 45.6 kmM 4.6 · 78 km ESE of Kamaishi, Japan · 66.5 kmM 4.7 · 199 km ESE of Kamaishi, Japan · 56.1 kmM 4.6 · 236 km SE of ?funato, Japan · 96.7 kmM 4.6 · 229 km SE of ?funato, Japan · 89.5 kmM 4.6 · 233 km ESE of ?funato, Japan · 92.9 kmM 4.7 · 214 km ESE of Ishinomaki, Japan · 87.6 kmM 5.1 · 88 km ESE of Yamada, Japan · 72.8 kmM 4.6 · 86 km ESE of Ishinomaki, Japan · 95.4 kmM 4.7 · 101 km ESE of Ishinomaki, Japan · 94.1 kmM 4.8 · 222 km ESE of Kamaishi, Japan · 89.0 kmM 4.6 · 48 km ESE of Kamaishi, Japan · 96.6 kmM 4.6 · off the east coast of Honshu, Japan · 75.3 kmM 4.6 · 110 km ESE of Ishinomaki, Japan · 95.1 kmM 4.9 · 136 km E of Yamada, Japan · 88.2 kmM 4.8 · 76 km E of Ishinomaki, Japan · 98.9 kmM 4.6 · 235 km ESE of Kamaishi, Japan · 90.6 kmM 4.6 · 76 km E of Ishinomaki, Japan · 98.0 kmM 4.6 · 200 km SE of ?funato, Japan · 68.3 kmM 4.6 · 77 km E of Ishinomaki, Japan · 96.0 kmM 4.7 · 62 km ESE of ?funato, Japan · 83.5 kmM 4.9 · 73 km ESE of Yamada, Japan · 87.8 kmM 4.7 · 76 km E of Ishinomaki, Japan · 99.4 kmM 4.6 · 131 km ESE of Yamada, Japan · 59.6 kmM 4.7 · 194 km ESE of ?funato, Japan · 53.5 kmM 4.8 · 188 km ESE of Ishinomaki, Japan · 71.2 kmM 4.7 · 103 km ESE of Yamada, Japan · 67.0 kmM 4.5 · 85 km E of Ishinomaki, Japan · 91.1 kmM 4.6 · 92 km E of Ishinomaki, Japan · 80.5 kmM 4.5 · 78 km E of Ishinomaki, Japan · 93.7 kmM 4.6 · 83 km E of Ishinomaki, Japan · 88.8 kmM 4.8 · 191 km ESE of Ishinomaki, Japan · 80.4 kmM 4.6 · 102 km ESE of Ishinomaki, Japan · 92.3 kmM 4.6 · 97 km SE of ?funato, Japan · 59.9 kmM 4.5 · 87 km E of Ishinomaki, Japan · 88.6 kmM 4.5 · 72 km E of Ishinomaki, Japan · 99.2 kmM 4.7 · 87 km ESE of Yamada, Japan · 82.4 kmM 4.7 · 62 km ESE of Kamaishi, Japan · 82.2 kmM 4.6 · 208 km ESE of Ishinomaki, Japan · 95.7 kmM 4.6 · 81 km E of Ishinomaki, Japan · 94.1 kmM 4.9 · 204 km SE of ?funato, Japan · 73.1 kmM 4.7 · 107 km ESE of Ishinomaki, Japan · 96.9 kmM 4.5 · 134 km SE of ?funato, Japan · 46.2 kmM 4.6 · 116 km SE of ?funato, Japan · 53.8 kmM 4.6 · 216 km ESE of Ishinomaki, Japan · 87.9 kmM 4.5 · 231 km ESE of Kamaishi, Japan · 86.1 kmM 4.7 · 121 km ESE of Kamaishi, Japan · 24.6 kmM 4.5 · 200 km ESE of ?funato, Japan · 58.0 kmM 5.2 · 103 km ESE of Kamaishi, Japan · 41.6 kmM 4.5 · 68 km ESE of ?funato, Japan · 77.6 kmM 4.9 · 78 km E of Ishinomaki, Japan · 97.4 kmM 5.3 · 55 km SE of Kamaishi, Japan · 89.6 kmM 4.7 · 92 km E of Yamada, Japan · 89.3 kmM 4.8 · 194 km ESE of Ishinomaki, Japan · 89.0 kmM 4.7 · 195 km ESE of Ishinomaki, Japan · 89.0 kmM 4.7 · 94 km ESE of Kamaishi, Japan · 65.1 kmM 4.8 · 230 km ESE of ?funato, Japan · 89.4 kmM 4.5 · 171 km ESE of Ishinomaki, Japan · 96.5 kmM 4.5 · 74 km E of Ishinomaki, Japan · 97.4 kmM 4.7 · 231 km ESE of Kamaishi, Japan · 86.8 kmM 4.8 · 153 km ESE of Kamaishi, Japan · 9.9 kmM 4.8 · 164 km ESE of Ishinomaki, Japan · 72.9 kmM 4.8 · 203 km SE of ?funato, Japan · 68.3 kmM 4.6 · 219 km SE of ?funato, Japan · 81.4 kmM 4.5 · 209 km SE of ?funato, Japan · 72.8 kmM 5.0 · 203 km SE of ?funato, Japan · 68.6 kmM 4.6 · 215 km SE of ?funato, Japan · 77.7 kmM 5.4 · 202 km SE of ?funato, Japan · 68.8 kmM 4.7 · 94 km E of Ishinomaki, Japan · 78.1 kmM 4.8 · 143 km ESE of Kamaishi, Japan · 12.6 kmM 4.8 · 62 km SE of ?funato, Japan · 85.9 kmM 5.1 · near the east coast of Honshu, Japan · 39.4 kmM 4.6 · 87 km E of Ishinomaki, Japan · 88.1 kmM 4.6 · 87 km E of Ishinomaki, Japan · 89.7 kmM 4.5 · 178 km ESE of ?funato, Japan · 36.2 kmM 4.8 · 132 km E of Yamada, Japan · 99.3 kmM 4.6 · 125 km ESE of Ishinomaki, Japan · 81.4 kmM 4.5 · 139 km ESE of Ishinomaki, Japan · 70.5 kmM 4.5 · 118 km ESE of Ishinomaki, Japan · 78.3 kmM 4.8 · 78 km ESE of Kamaishi, Japan · 69.6 kmM 4.7 · 130 km ESE of ?funato, Japan · 16.1 kmM 4.7 · 227 km ESE of Ishinomaki, Japan · 98.8 kmM 4.6 · 129 km ESE of Ishinomaki, Japan · 89.4 kmM 4.6 · 65 km ESE of ?tsuchi, Japan · 90.1 kmM 4.5 · 213 km ESE of Kamaishi, Japan · 78.7 kmM 4.6 · 206 km ESE of Kamaishi, Japan · 71.9 kmM 4.9 · 199 km ESE of Ishinomaki, Japan · 86.6 kmM 4.6 · 195 km ESE of Ishinomaki, Japan · 80.4 kmM 4.9 · 188 km ESE of Ishinomaki, Japan · 79.9 kmM 4.9 · 114 km ESE of Yamada, Japan · 58.3 kmM 4.9 · 74 km E of Ishinomaki, Japan · 97.3 kmM 4.8 · near the east coast of Honshu, Japan · 97.1 kmM 4.6 · 72 km ESE of Kamaishi, Japan · 74.8 kmM 4.5 · 46 km ESE of Kamaishi, Japan · 98.8 kmM 4.6 · 211 km ESE of Kamaishi, Japan · 83.5 kmM 5.1 · 48 km ESE of Kamaishi, Japan · 98.7 kmM 4.9 · 195 km ESE of Kamaishi, Japan · 59.6 kmM 4.6 · 87 km ESE of Yamada, Japan · 80.6 kmM 4.6 · 168 km ESE of Ishinomaki, Japan · 57.7 km
M 4.9 · 145 km SE of Kamaishi, 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 4.6214 km ESE of Ishinomaki, Japan98.5 km · 2011-04-09 18:51:15 UTCM 4.7139 km SE of ?funato, Japan45.6 km · 2011-04-09 16:57:27 UTCM 4.678 km ESE of Kamaishi, Japan66.5 km · 2011-04-09 06:29:42 UTCM 4.7199 km ESE of Kamaishi, Japan56.1 km · 2011-04-08 19:13:29 UTCM 4.6236 km SE of ?funato, Japan96.7 km · 2011-04-08 12:10:54 UTCM 4.6229 km SE of ?funato, Japan89.5 km · 2011-04-08 10:04:15 UTCM 4.6233 km ESE of ?funato, Japan92.9 km · 2011-04-08 07:07:39 UTCM 4.7214 km ESE of Ishinomaki, Japan87.6 km · 2011-04-08 05:09:06 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 4.9 → M 4.9
Depth change+0.0 km
Last update6271451 min
2014-11-07 01:43:59 UTC2014-11-07 01:43:59 UTC

Explore related context

Related or nearby earthquakes

M 5.6 · 209 km ESE of Ōfunato, Japan66 km · 2026-08-26 19:21:42 UTCM 4.8 · 65 km ESE of Ōfunato, Japan81 km · 2026-03-06 20:31:51 UTCM 5.4 · 106 km E of Yamada, Japan93 km · 2026-03-08 13:08:35 UTCM 4.9 · 51 km ESE of Ōfunato, Japan95 km · 2026-07-03 01:44:52 UTC

Geographic context

CountryJapan →Nearby cityKamaishi →Seismic sequenceM 4.9 →

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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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