Updated 2026-10-16 19:44:52 UTC

M 1.8 — 3 km WSW of San Francisco Zoo, CA

Magnitude 1.8, depth 8.5 km, 2026-10-16 19:43:17 UTC.

MagnitudeM 1.8
Depth8.5 km
Felt reports—
Statusautomatic
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 Index48/100Normal
Current 30 days1
Historical monthly median1.0
Historical percentileP48
M5+ in 30 days0
M6+ in 30 days0
Activity trendaround the historical range (+0%)
Baseline months: 43Last 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 1.8 at 8.5 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#194,347
Magnitude rank in country#771
M4.5+ within 250 km, ±15 days0
Quake Pulse

Impact and context

Descriptive indicators available for this event and its surroundings.

0/100Limited context
Felt reports—
Max felt intensity (CDI)—
Instrumental intensity (MMI)—
PAGER alertNot available
Tsunami indicator—
USGS significance52
Depth contextShallow
Nearby major citySan Francisco12 km · 808,000

Nearby major city

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.

M 1.8 · 3 km WSW of San Francisco Zoo, CA · 100 kmInteractive 3D view of earthquakes within 100 km of M 1.8 · 3 km WSW of San Francisco Zoo, CA.M 1.8 · 3 km WSW of San Francisco Zoo, CAM 1.7 · 1 km SW of San Ramon, CA · 49.1 kmM 2.4 · 2 km SSW of San Ramon, CA · 48.6 kmM 1.6 · 1 km WSW of San Ramon, CA · 48.5 kmM 1.4 · 2 km W of San Ramon, CA · 48.1 kmM 1.1 · 2 km SSW of San Ramon, CA · 48.8 kmM 1.8 · 1 km SW of San Ramon, CA · 48.5 kmM 1.6 · 2 km WSW of Alamo, CA · 45.0 kmM 1.3 · 10 km E of Alum Rock, CA · 83.0 kmM 1.8 · 13 km WNW of Bonny Doon, CA · 73.9 kmM 1.6 · 4 km ENE of El Granada, CA · 24.3 kmM 1.2 · 6 km S of Portola Valley, CA · 51.1 kmM 0.8 · 12 km SE of Livermore, CA · 76.8 kmM 1.5 · 13 km SE of Livermore, CA · 77.5 kmM 1.0 · 13 km SE of Livermore, CA · 78.6 kmM 1.7 · 2 km N of Pleasant Hill, CA · 50.4 kmM 1.2 · 1 km WNW of Alamo, CA · 46.4 kmM 1.4 · 7 km E of Santa Venetia, CA · 31.6 kmM 1.4 · 3 km NNE of San Leandro, CA · 34.9 kmM 0.7 · 20 km E of Alum Rock, CA · 92.6 kmM 1.9 · 1 km NE of Woodside, CA · 40.2 kmM 1.9 · 2 km WSW of Kenwood, CA · 77.0 kmM 1.6 · 1 km NE of Angwin, CA · 96.5 kmM 2.1 · 1 km WSW of Angwin, CA · 95.6 kmM 2.3 · 4 km SSW of Lexington Hills, CA · 80.6 kmM 0.9 · 14 km SSE of Livermore, CA · 75.1 kmM 1.8 · 19 km WNW of Boulder Creek, CA · 58.9 kmM 2.4 · 6 km SE of Napa, CA · 65.4 kmM 1.7 · 2 km SSE of Los Altos Hills, CA · 53.5 kmM 1.2 · 14 km NE of Napa, CA · 81.8 kmM 1.6 · 6 km SW of Clayton, CA · 52.9 kmM 1.5 · 13 km E of Yountville, CA · 80.9 kmM 1.7 · 4 km NW of Orinda, CA · 35.0 kmM 0.9 · 3 km ESE of Berkeley, CA · 30.5 kmM 1.4 · 6 km WNW of Yountville, CA · 78.8 kmM 1.6 · 9 km NNE of Milpitas, CA · 64.3 kmM 1.2 · 8 km SW of Loyola, CA · 57.6 kmM 1.0 · 12 km SE of Livermore, CA · 76.8 kmM 2.4 · 9 km E of Alum Rock, CA · 82.1 kmM 1.2 · 12 km SE of Livermore, CA · 76.7 kmM 2.4 · 6 km WNW of Petaluma, CA · 61.6 kmM 2.0 · 1 km NNW of East Richmond Heights, CA · 32.9 kmM 1.0 · 4 km WSW of Cupertino, CA · 60.3 kmM 1.1 · 5 km WSW of Cupertino, CA · 60.2 kmM 1.8 · 4 km NW of Santa Rosa, CA · 86.2 kmM 1.2 · 2 km NE of Pacifica, CA · 11.7 kmM 1.3 · 11 km SW of Loyola, CA · 58.9 kmM 2.2 · 8 km W of Cotati, CA · 71.5 kmM 2.0 · 7 km WSW of Calistoga, CA · 94.0 kmM 2.6 · 6 km W of Yountville, CA · 76.7 kmM 1.2 · 15 km E of Seven Trees, CA · 89.4 kmM 1.7 · 2 km SW of San Ramon, CA · 48.0 kmM 1.3 · 11 km SSE of Portola Valley, CA · 55.6 kmM 2.1 · 12 km NNE of Alum Rock, CA · 72.7 kmM 2.2 · 5 km SW of Yountville, CA · 73.6 kmM 1.6 · 3 km SW of San Ramon, CA · 47.4 kmM 1.1 · 8 km SSE of Sunol, CA · 64.1 kmM 2.4 · 1 km SSW of Novato, CA · 42.6 kmM 1.2 · 8 km SSE of Sunol, CA · 63.7 kmM 2.3 · 4 km WNW of Orinda, CA · 33.6 kmM 2.2 · 1 km E of Port Costa, CA · 48.7 kmM 1.7 · 12 km SE of Livermore, CA · 77.1 kmM 1.4 · 12 km SE of Livermore, CA · 76.9 kmM 1.2 · 2 km E of Black Point-Green Point, CA · 44.8 kmM 1.1 · 2 km NE of Danville, CA · 50.0 kmM 1.4 · 12 km SE of Livermore, CA · 76.8 kmM 1.1 · 13 km SE of Livermore, CA · 78.5 kmM 2.2 · 5 km SW of Yountville, CA · 74.4 kmM 1.0 · 4 km E of St. Helena, CA · 88.9 kmM 1.2 · 1 km S of Angwin, CA · 94.6 kmM 0.9 · 20 km NE of Alum Rock, CA · 78.3 kmM 1.4 · 4 km NNW of San Leandro, CA · 33.0 kmM 2.3 · 2 km SE of Pacifica, CA · 14.2 kmM 1.5 · 4 km N of Santa Rosa, CA · 86.7 kmM 1.5 · 8 km E of Alum Rock, CA · 81.2 kmM 1.4 · 3 km SW of American Canyon, CA · 53.4 kmM 1.7 · 3 km ENE of San Rafael, CA · 29.7 kmM 2.0 · 9 km ESE of Livermore, CA · 75.7 kmM 1.7 · 2 km NNE of Pleasant Hill, CA · 51.4 kmM 1.2 · 2 km SE of Pacifica, CA · 14.1 kmM 2.1 · 2 km NE of Pacifica, CA · 11.3 kmM 1.1 · 3 km W of Dublin, CA · 49.8 kmM 1.1 · 4 km WNW of Dublin, CA · 49.1 kmM 2.5 · 10 km ENE of Milpitas, CA · 70.4 kmM 1.2 · 5 km NNW of Morgan Hill, CA · 97.3 kmM 1.8 · 7 km W of Saint Helena, CA · 86.8 kmM 1.8 · 8 km W of Saint Helena, CA · 86.7 kmM 1.2 · 18 km E of Alum Rock, CA · 88.0 kmM 1.8 · 4 km NNE of Pacifica, CA · 9.6 kmM 2.6 · 21 km E of Alum Rock, CA · 93.1 km
M 1.8 · 3 km WSW of San Francisco Zoo, CA100 km89 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

Quake Pulse

USGS data evolution

Earthquake parameters can be revised after first publication. This timeline shows versions retained by Quake Pulse.

Revisions1
Magnitude change+0.0M 1.8 → M 1.8
Depth change+0.0 km
Last update4183 min
2026-10-16 19:44:52 UTC2026-10-16 19:44:52 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.

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