Updated 2025-12-22 17:50:49 UTC

M 4.9 — 174 km E of Nago, Japan

Magnitude 4.9, depth 10.0 km, 2018-09-15 13:53:38 UTC.

MagnitudeM 4.9
Depth10.0 km
Felt reports—
Statusreviewed
TsunamiNo
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 days33
Quake Pulse

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.

M 4.9 · 174 km E of Nago, Japan · 100 kmInteractive 3D view of earthquakes within 100 km of M 4.9 · 174 km E of Nago, Japan.M 4.9 · 174 km E of Nago, JapanM 4.7 · 146 km E of Nago, Japan · 40.6 kmM 4.5 · 159 km E of Nago, Japan · 15.8 kmM 5.0 · 147 km E of Nago, Japan · 30.8 kmM 4.7 · 172 km E of Nago, Japan · 2.7 kmM 4.6 · 171 km E of Nago, Japan · 6.0 kmM 5.4 · 166 km E of Nago, Japan · 12.2 kmM 4.6 · 166 km E of Nago, Japan · 8.9 kmM 4.7 · 166 km E of Nago, Japan · 11.1 kmM 4.6 · 177 km S of Naze, Japan · 5.9 kmM 4.6 · 164 km E of Nago, Japan · 12.0 kmM 5.0 · Ryukyu Islands, Japan · 5.4 kmM 4.5 · 168 km E of Nago, Japan · 11.6 kmM 4.8 · 158 km E of Nago, Japan · 16.6 kmM 4.6 · 160 km E of Nago, Japan · 14.6 kmM 4.6 · 178 km E of Nago, Japan · 14.5 kmM 4.6 · 160 km E of Nago, Japan · 32.4 kmM 5.6 · 153 km E of Nago, Japan · 28.3 kmM 5.2 · 164 km E of Nago, Japan · 11.6 kmM 4.7 · 182 km E of Nago, Japan · 12.5 kmM 4.6 · 160 km E of Nago, Japan · 15.3 kmM 4.6 · 156 km E of Nago, Japan · 20.1 kmM 5.0 · 156 km E of Nago, Japan · 24.0 kmM 4.9 · 158 km E of Nago, Japan · 22.3 kmM 4.7 · 169 km E of Nago, Japan · 13.6 kmM 5.7 · 161 km E of Nago, Japan · 15.2 kmM 5.1 · 151 km E of Nago, Japan · 23.8 kmM 4.7 · 169 km E of Nago, Japan · 6.4 kmM 4.8 · 189 km E of Nago, Japan · 24.4 kmM 4.6 · 159 km E of Nago, Japan · 15.5 kmM 4.9 · 164 km E of Nago, Japan · 12.5 kmM 4.9 · 170 km E of Nago, Japan · 14.8 kmM 5.4 · 156 km E of Nago, Japan · 18.5 kmM 4.9 · 166 km E of Nago, Japan · 9.9 kmM 4.6 · 160 km E of Nago, Japan · 16.4 kmM 4.8 · 160 km E of Nago, Japan · 14.3 kmM 4.6 · 162 km E of Nago, Japan · 13.1 kmM 5.7 · 165 km E of Nago, Japan · 9.5 km
M 4.9 · 174 km E of Nago, Japan100 km37 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

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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 update420204 min
2025-12-22 17:50:49 UTC2025-12-22 17:50:49 UTC

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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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