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

M 4.9 — 223 km ESE of Yamada, Japan

Magnitude 4.9, depth 10.0 km, 2011-03-11 20:51:21 UTC.

MagnitudeM 4.9
Depth10.0 km
Felt reports—
Statusreviewed
TsunamiNo

Japan → · Yamada →

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 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#48,163
Magnitude rank in country#3,635
M4.5+ within 250 km, ±15 days1,039
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 city—
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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 · 223 km ESE of Yamada, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 4.9 · 223 km ESE of Yamada, Japan.M 4.9 · 223 km ESE of Yamada, JapanM 4.7 · 199 km ESE of Kamaishi, Japan · 81.8 kmM 4.8 · 222 km ESE of Kamaishi, Japan · 42.3 kmM 4.6 · off the east coast of Honshu, Japan · 91.2 kmM 4.9 · 136 km E of Yamada, Japan · 89.2 kmM 4.6 · 235 km ESE of Kamaishi, Japan · 91.8 kmM 4.5 · 253 km ESE of Yamada, Japan · 31.0 kmM 4.5 · 276 km ESE of Kamaishi, Japan · 85.0 kmM 4.6 · 131 km ESE of Yamada, Japan · 92.4 kmM 4.6 · 175 km E of Miyako, Japan · 93.2 kmM 4.5 · 206 km E of Miyako, Japan · 89.9 kmM 4.6 · 260 km ESE of Kamaishi, Japan · 74.3 kmM 4.5 · 231 km ESE of Kamaishi, Japan · 94.5 kmM 4.7 · 267 km ESE of Kamaishi, Japan · 55.5 kmM 4.9 · 280 km ESE of Kamaishi, Japan · 98.0 kmM 4.6 · 245 km ESE of Kamaishi, Japan · 95.7 kmM 4.5 · 251 km ESE of Kamaishi, Japan · 86.1 kmM 4.7 · 231 km ESE of Kamaishi, Japan · 87.6 kmM 4.8 · 207 km E of Yamada, Japan · 22.7 kmM 4.6 · 204 km E of Yamada, Japan · 30.5 kmM 4.5 · 251 km ESE of Kamaishi, Japan · 82.3 kmM 4.5 · 165 km E of Yamada, Japan · 69.3 kmM 4.8 · 132 km E of Yamada, Japan · 98.0 kmM 4.5 · 264 km ESE of Kamaishi, Japan · 59.4 kmM 4.5 · 153 km E of Yamada, Japan · 79.8 kmM 4.8 · 140 km E of Yamada, Japan · 99.1 kmM 4.5 · 213 km ESE of Kamaishi, Japan · 50.1 kmM 4.6 · 206 km ESE of Kamaishi, Japan · 51.4 kmM 4.5 · 276 km ESE of Kamaishi, Japan · 79.7 kmM 4.6 · 211 km ESE of Kamaishi, Japan · 35.3 kmM 4.5 · 279 km ESE of Kamaishi, Japan · 71.1 kmM 4.9 · 195 km ESE of Kamaishi, Japan · 60.0 kmM 4.7 · off the east coast of Honshu, Japan · 50.5 kmM 4.7 · 212 km E of Miyako, Japan · 99.5 kmM 4.5 · 267 km ESE of Kamaishi, Japan · 72.5 kmM 4.9 · 256 km ESE of Kamaishi, Japan · 62.0 kmM 4.8 · 218 km ESE of Kamaishi, Japan · 76.6 kmM 4.7 · 276 km ESE of Kamaishi, Japan · 72.9 kmM 4.7 · 207 km E of Miyako, Japan · 84.8 kmM 4.6 · 273 km ESE of Kamaishi, Japan · 82.8 kmM 4.7 · 197 km ESE of Kamaishi, Japan · 53.6 kmM 4.9 · 240 km ESE of Kamaishi, Japan · 36.4 kmM 4.9 · 188 km ESE of Kamaishi, Japan · 56.1 kmM 4.8 · 202 km ESE of Kamaishi, Japan · 49.2 kmM 5.2 · 190 km ESE of Kamaishi, Japan · 56.2 kmM 4.7 · 146 km E of Yamada, Japan · 78.9 kmM 4.8 · 222 km ESE of Yamada, Japan · 22.7 kmM 4.9 · 207 km ESE of Yamada, Japan · 27.8 kmM 4.8 · 203 km ESE of Yamada, Japan · 31.2 kmM 4.6 · 237 km ESE of Yamada, Japan · 16.2 kmM 4.8 · 229 km ESE of Yamada, Japan · 11.3 kmM 4.7 · 216 km ESE of Yamada, Japan · 18.9 kmM 4.7 · 225 km E of Yamada, Japan · 17.0 kmM 4.7 · 213 km ESE of Yamada, Japan · 29.3 kmM 4.8 · 223 km ESE of Kamaishi, Japan · 34.5 kmM 4.6 · 211 km ESE of Yamada, Japan · 12.0 kmM 4.5 · 220 km ESE of Yamada, Japan · 15.1 kmM 4.6 · 216 km ESE of Yamada, Japan · 7.5 kmM 4.7 · 225 km ESE of Yamada, Japan · 7.7 kmM 4.7 · 206 km ESE of Kamaishi, Japan · 58.6 kmM 4.6 · 262 km ESE of Kamaishi, Japan · 82.3 kmM 4.6 · 198 km E of Yamada, Japan · 43.5 kmM 4.8 · 232 km ESE of Kamaishi, Japan · 41.6 kmM 4.6 · 137 km ESE of Yamada, Japan · 86.4 kmM 4.6 · 280 km ESE of Kamaishi, Japan · 92.4 kmM 4.6 · 146 km E of Yamada, Japan · 80.1 kmM 4.5 · 272 km ESE of Kamaishi, Japan · 66.1 kmM 5.0 · 126 km ESE of Yamada, Japan · 96.6 kmM 4.5 · 144 km E of Yamada, Japan · 94.6 kmM 4.5 · 263 km ESE of Kamaishi, Japan · 70.4 kmM 5.2 · 214 km E of Yamada, Japan · 21.9 kmM 4.6 · 246 km ESE of Kamaishi, Japan · 66.1 kmM 4.9 · off the east coast of Honshu, Japan · 80.2 kmM 4.9 · 261 km ESE of Kamaishi, Japan · 51.4 kmM 4.7 · 226 km ESE of Kamaishi, Japan · 46.7 kmM 4.9 · 267 km ESE of Kamaishi, Japan · 79.9 kmM 4.5 · 168 km ESE of Kamaishi, Japan · 79.6 kmM 4.6 · 236 km ESE of Kamaishi, Japan · 72.4 kmM 4.5 · 205 km E of Miyako, Japan · 72.6 kmM 4.7 · 235 km E of Yamada, Japan · 47.0 kmM 4.8 · 208 km E of Miyako, Japan · 84.0 kmM 4.7 · 261 km ESE of Yamada, Japan · 42.4 kmM 4.7 · 240 km ESE of Kamaishi, Japan · 74.5 kmM 4.7 · 228 km ESE of Kamaishi, Japan · 39.7 kmM 4.7 · 202 km ESE of ?funato, Japan · 99.3 kmM 4.9 · 212 km E of Miyako, Japan · 86.2 kmM 4.7 · 237 km E of Yamada, Japan · 64.5 kmM 4.8 · 210 km ESE of Yamada, Japan · 18.6 kmM 4.8 · 214 km E of Miyako, Japan · 81.4 kmM 4.8 · 207 km E of Miyako, Japan · 73.1 kmM 4.6 · 202 km ESE of Kamaishi, Japan · 68.4 kmM 4.6 · 164 km ESE of Kamaishi, Japan · 96.3 kmM 4.5 · 203 km E of Miyako, Japan · 80.0 kmM 5.3 · 214 km ESE of Kamaishi, Japan · 80.3 kmM 4.6 · 195 km ESE of Kamaishi, Japan · 61.3 kmM 4.7 · 219 km E of Miyako, Japan · 89.9 kmM 4.9 · 258 km ESE of Yamada, Japan · 44.1 kmM 4.5 · 267 km ESE of Kamaishi, Japan · 97.6 kmM 4.5 · 216 km ESE of ?funato, Japan · 99.6 kmM 5.1 · 206 km E of Miyako, Japan · 81.1 kmM 4.8 · 220 km ESE of Kamaishi, Japan · 51.0 km
M 4.9 · 223 km ESE of Yamada, 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 4.7199 km ESE of Kamaishi, Japan81.8 km · 2011-04-08 19:13:29 UTCM 4.8222 km ESE of Kamaishi, Japan42.3 km · 2011-04-07 11:52:33 UTCM 4.6off the east coast of Honshu, Japan91.2 km · 2011-04-07 09:33:16 UTCM 4.9136 km E of Yamada, Japan89.2 km · 2011-04-06 19:20:20 UTCM 4.6235 km ESE of Kamaishi, Japan91.8 km · 2011-04-06 16:06:04 UTCM 4.5253 km ESE of Yamada, Japan31.0 km · 2011-04-06 00:17:17 UTCM 4.5276 km ESE of Kamaishi, Japan85.0 km · 2011-04-04 22:49:20 UTCM 4.6131 km ESE of Yamada, Japan92.4 km · 2011-04-04 06:12:57 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 4.9 → M 4.9
Depth change+0.0 km
Last update6271365 min
2014-11-07 01:43:59 UTC2014-11-07 01:43:59 UTC

Explore related context

Related or nearby earthquakes

M 4.7 · 240 km ESE of Yamada, Japan21 km · 2026-06-17 14:28:50 UTCM 4.5 · 228 km ESE of Kamaishi, Japan86 km · 2026-02-06 17:56:52 UTCM 4.5 · 136 km E of Yamada, Japan93 km · 2026-04-20 16:13:12 UTCM 4.6 · 153 km E of Miyako, Japan97 km · 2026-08-06 17:50:39 UTC

Geographic context

CountryJapan →Nearby cityYamada →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.

Read the methodology →

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