Updated 2025-12-22 15:40:31 UTC

M 5.1 — 81 km SE of Hihifo, Tonga

Magnitude 5.1, depth 10.0 km, 2009-10-05 09:22:49 UTC.

MagnitudeM 5.1
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 Index39/100Normal
Current 30 days24
Historical monthly median27.0
Historical percentileP39
M5+ in 30 days3
M6+ in 30 days0
Activity trendbelow the historical median (-11%)
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 5.1 at 10.0 km depth.
Counts describe detected earthquakes and are not a forecast or hazard assessment.
Quake Pulse

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#28,237
Magnitude rank in country#1,316
M4.5+ within 250 km, ±15 days241
Sequence context231 events →
Quake Pulse

Impact and context

Descriptive indicators available for this event and its surroundings.

16/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance400
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 5.1 · 81 km SE of Hihifo, Tonga · 100 kmInteractive 3D view of earthquakes within 100 km of M 5.1 · 81 km SE of Hihifo, Tonga.M 5.1 · 81 km SE of Hihifo, TongaM 4.8 · 57 km ESE of Hihifo, Tonga · 31.7 kmM 5.5 · 47 km ENE of Hihifo, Tonga · 74.1 kmM 4.9 · 44 km NE of Hihifo, Tonga · 92.6 kmM 4.7 · 80 km E of Hihifo, Tonga · 66.8 kmM 4.9 · 78 km E of Hihifo, Tonga · 51.7 kmM 4.7 · 47 km E of Hihifo, Tonga · 60.5 kmM 4.6 · 75 km ESE of Hihifo, Tonga · 19.8 kmM 4.6 · 65 km ESE of Hihifo, Tonga · 20.4 kmM 4.7 · 67 km E of Hihifo, Tonga · 49.7 kmM 5.4 · 73 km SE of Hihifo, Tonga · 7.2 kmM 4.5 · 89 km SE of Hihifo, Tonga · 9.6 kmM 4.6 · 69 km SSW of Hihifo, Tonga · 92.9 kmM 4.7 · 127 km ESE of Hihifo, Tonga · 55.5 kmM 5.9 · 85 km ENE of Hihifo, Tonga · 88.9 kmM 5.2 · 93 km ENE of Hihifo, Tonga · 98.1 kmM 4.9 · 97 km ENE of Hihifo, Tonga · 93.0 kmM 4.8 · 40 km E of Hihifo, Tonga · 59.5 kmM 5.3 · 172 km ESE of Hihifo, Tonga · 94.6 kmM 4.5 · 81 km SSE of Hihifo, Tonga · 28.0 kmM 4.9 · 26 km SSE of Hihifo, Tonga · 57.1 kmM 4.6 · 136 km E of Hihifo, Tonga · 87.6 kmM 4.7 · 32 km E of Hihifo, Tonga · 58.8 kmM 4.7 · Samoa Islands region · 47.1 kmM 4.7 · 66 km ESE of Hihifo, Tonga · 25.8 kmM 4.6 · 43 km SSE of Hihifo, Tonga · 48.3 kmM 4.8 · 44 km ENE of Hihifo, Tonga · 75.1 kmM 5.5 · 72 km SE of Hihifo, Tonga · 10.4 kmM 5.1 · 103 km ENE of Hihifo, Tonga · 96.9 kmM 5.5 · 66 km ESE of Hihifo, Tonga · 23.6 kmM 5.5 · 138 km SE of Hihifo, Tonga · 59.3 kmM 4.6 · 86 km ESE of Hihifo, Tonga · 20.5 kmM 5.0 · 146 km SE of Hihifo, Tonga · 65.8 kmM 5.4 · 133 km ESE of Hihifo, Tonga · 60.2 kmM 4.5 · 60 km SE of Hihifo, Tonga · 23.3 kmM 5.0 · 73 km SE of Hihifo, Tonga · 15.2 kmM 4.9 · 21 km ESE of Hihifo, Tonga · 60.8 kmM 4.5 · 40 km ESE of Hihifo, Tonga · 42.7 kmM 4.7 · 54 km ESE of Hihifo, Tonga · 32.6 kmM 5.1 · 147 km ESE of Hihifo, Tonga · 69.6 kmM 4.7 · 108 km ESE of Hihifo, Tonga · 32.7 kmM 4.7 · 85 km S of Hihifo, Tonga · 56.5 kmM 5.5 · Tonga · 33.4 kmM 6.1 · 54 km SE of Hihifo, Tonga · 28.2 kmM 5.2 · 86 km ESE of Hihifo, Tonga · 15.2 kmM 5.0 · 87 km ESE of Hihifo, Tonga · 18.0 kmM 4.9 · 40 km NE of Hihifo, Tonga · 93.0 kmM 4.6 · Tonga · 1.9 kmM 5.2 · 64 km SE of Hihifo, Tonga · 16.8 kmM 4.6 · 125 km ESE of Hihifo, Tonga · 62.2 kmM 5.1 · 54 km NE of Hihifo, Tonga · 97.1 kmM 4.5 · 96 km E of Hihifo, Tonga · 65.8 kmM 4.6 · 157 km SE of Hihifo, Tonga · 79.6 kmM 4.5 · 156 km SE of Hihifo, Tonga · 77.3 kmM 5.5 · 176 km SE of Hihifo, Tonga · 98.3 kmM 4.9 · 84 km SE of Hihifo, Tonga · 3.9 kmM 4.6 · 86 km ENE of Hihifo, Tonga · 91.3 kmM 4.5 · 93 km SE of Hihifo, Tonga · 14.4 kmM 4.7 · 37 km ENE of Hihifo, Tonga · 75.7 kmM 4.9 · 166 km ESE of Hihifo, Tonga · 93.8 kmM 5.0 · 150 km SE of Hihifo, Tonga · 70.7 kmM 4.7 · 125 km SE of Hihifo, Tonga · 44.8 kmM 5.3 · 152 km ESE of Hihifo, Tonga · 74.1 kmM 5.0 · 94 km ESE of Hihifo, Tonga · 45.7 kmM 4.6 · 116 km ESE of Hihifo, Tonga · 56.0 kmM 5.3 · 145 km ESE of Hihifo, Tonga · 67.8 kmM 4.6 · 142 km ESE of Hihifo, Tonga · 64.4 kmM 4.6 · 93 km SE of Hihifo, Tonga · 12.9 kmM 4.8 · 130 km SE of Hihifo, Tonga · 49.7 kmM 4.9 · 58 km ENE of Hihifo, Tonga · 83.1 kmM 4.5 · 84 km SE of Hihifo, Tonga · 9.8 kmM 4.7 · 148 km ESE of Hihifo, Tonga · 71.7 kmM 4.6 · 111 km ESE of Hihifo, Tonga · 57.2 kmM 5.0 · 74 km E of Hihifo, Tonga · 68.6 kmM 4.6 · 71 km SSE of Hihifo, Tonga · 34.8 kmM 4.9 · 73 km SE of Hihifo, Tonga · 13.0 kmM 4.7 · 79 km E of Hihifo, Tonga · 43.7 kmM 5.0 · 78 km ENE of Hihifo, Tonga · 98.1 kmM 4.5 · 142 km ESE of Hihifo, Tonga · 73.9 kmM 4.9 · 117 km ESE of Hihifo, Tonga · 53.9 kmM 4.6 · 96 km E of Hihifo, Tonga · 60.6 kmM 4.9 · Samoa Islands region · 89.1 kmM 6.0 · 134 km E of Hihifo, Tonga · 99.5 kmM 4.5 · 140 km E of Hihifo, Tonga · 82.0 kmM 5.5 · 59 km NE of Hihifo, Tonga · 94.3 kmM 4.6 · 100 km E of Hihifo, Tonga · 72.0 kmM 4.9 · 131 km ESE of Hihifo, Tonga · 73.8 kmM 4.6 · 59 km E of Hihifo, Tonga · 58.9 kmM 4.9 · 130 km ESE of Hihifo, Tonga · 66.5 kmM 4.8 · 99 km ENE of Hihifo, Tonga · 96.4 kmM 4.5 · 74 km E of Hihifo, Tonga · 65.0 kmM 4.5 · 92 km ENE of Hihifo, Tonga · 87.8 kmM 4.6 · 81 km ENE of Hihifo, Tonga · 91.6 kmM 4.6 · 100 km ESE of Hihifo, Tonga · 37.7 kmM 4.6 · 50 km E of Hihifo, Tonga · 58.7 kmM 4.9 · 78 km ESE of Hihifo, Tonga · 23.4 kmM 4.6 · 67 km E of Hihifo, Tonga · 43.0 kmM 4.9 · 90 km E of Hihifo, Tonga · 54.1 kmM 4.9 · 127 km ESE of Hihifo, Tonga · 50.0 kmM 4.6 · 157 km ESE of Hihifo, Tonga · 83.4 kmM 4.6 · 89 km ENE of Hihifo, Tonga · 79.5 km
M 5.1 · 81 km SE of Hihifo, Tonga100 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.

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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 5.1 → M 5.1
Depth change+0.0 km
Last update420639 min
2025-12-22 15:40:31 UTC2025-12-22 15:40:31 UTC

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Putting this earthquake in context

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Interpret the numbers

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