Updated 2026-09-21 06:12:21 UTC

M 1.7 — 3 km ENE of San Rafael, CA

Magnitude 1.7, depth 10.5 km, 2026-09-21 05:41:59 UTC.

MagnitudeM 1.7
Depth10.5 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 Index84/100Elevated
Current 30 days18
Historical monthly median11.0
Historical percentileP84
M5+ in 30 days6
M6+ in 30 days0
Activity trendabove the historical median (+64%)
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 1.7 at 10.5 km depth.
  • The solution has already been revised 2 times in Quake Pulse.
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#195,114
Magnitude rank in country#11,147
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 significance44
Depth contextShallow
Nearby major citySan Francisco24 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 1.7 · 3 km ENE of San Rafael, CA · 50 kmInteractive 3D view of earthquakes within 50 km of M 1.7 · 3 km ENE of San Rafael, CA.M 1.7 · 3 km ENE of San Rafael, CAM 2.4 · 6 km SE of Napa, CA · 37.8 kmM 1.6 · 6 km SW of Clayton, CA · 46.6 kmM 1.7 · 4 km NW of Orinda, CA · 26.7 kmM 0.9 · 3 km ESE of Berkeley, CA · 25.6 kmM 1.4 · 6 km WNW of Yountville, CA · 49.1 kmM 2.4 · 6 km WNW of Petaluma, CA · 34.9 kmM 2.0 · 1 km NNW of East Richmond Heights, CA · 16.4 kmM 1.2 · 2 km NE of Pacifica, CA · 39.6 kmM 2.2 · 8 km W of Cotati, CA · 46.3 kmM 2.6 · 6 km W of Yountville, CA · 47.0 kmM 2.2 · 5 km SW of Yountville, CA · 43.9 kmM 2.4 · 1 km SSW of Novato, CA · 14.5 kmM 2.3 · 4 km WNW of Orinda, CA · 26.3 kmM 2.2 · 1 km E of Port Costa, CA · 29.6 kmM 1.2 · 2 km E of Black Point-Green Point, CA · 15.1 kmM 1.1 · 2 km NE of Danville, CA · 48.0 kmM 2.2 · 5 km SW of Yountville, CA · 44.7 kmM 1.4 · 4 km NNW of San Leandro, CA · 38.5 kmM 2.3 · 2 km SE of Pacifica, CA · 42.4 kmM 1.4 · 3 km SW of American Canyon, CA · 26.7 kmM 1.7 · 2 km NNE of Pleasant Hill, CA · 39.9 kmM 1.2 · 2 km SE of Pacifica, CA · 42.3 kmM 2.1 · 2 km NE of Pacifica, CA · 39.5 kmM 1.8 · 4 km NNE of Pacifica, CA · 37.5 kmM 1.5 · 2 km N of Berkeley, CA · 22.5 kmM 1.5 · 4 km NNE of Crockett, CA · 28.7 kmM 0.8 · 4 km E of Berkeley, CA · 26.5 kmM 1.4 · 3 km N of Piedmont, CA · 27.1 kmM 1.2 · 1 km SE of Oakland, CA · 32.7 kmM 0.9 · 2 km ENE of Berkeley, CA · 24.5 kmM 1.5 · 7 km E of Santa Venetia, CA · 4.8 kmM 1.1 · 1 km SW of Diablo, CA · 49.9 kmM 2.5 · 2 km ESE of Oakland, CA · 33.8 kmM 1.2 · 4 km WNW of San Francisco Zoo, CA · 26.6 kmM 2.1 · 8 km ENE of Vallejo, CA · 35.3 kmM 1.0 · 1 km E of Pacheco, CA · 38.7 kmM 1.7 · 5 km NNW of Green Valley, CA · 45.2 kmM 1.1 · 7 km NW of American Canyon, CA · 31.4 kmM 1.3 · 3 km WNW of Orinda, CA · 27.8 kmM 1.8 · 8 km E of Vallejo, CA · 34.9 kmM 1.1 · 3 km ESE of Pacifica, CA · 42.3 kmM 1.6 · 2 km ESE of Pacifica, CA · 42.0 kmM 2.1 · 2 km SE of Pacifica, CA · 42.4 kmM 1.1 · 2 km SSE of Green Valley, CA · 41.9 kmM 1.8 · 1 km SE of Pacifica, CA · 41.6 kmM 1.4 · 7 km E of Santa Venetia, CA · 4.5 kmM 1.9 · 7 km NNE of Benicia, CA · 35.6 kmM 1.0 · 2 km W of Hercules, CA · 17.4 kmM 1.4 · 4 km NNE of San Leandro, CA · 40.2 kmM 1.2 · 1 km NNE of Pacheco, CA · 37.7 kmM 2.3 · 1 km SE of Pacifica, CA · 41.7 kmM 2.0 · 2 km NW of Lafayette, CA · 33.7 kmM 1.4 · 2 km W of San Ramon, CA · 49.4 kmM 0.9 · 1 km ESE of Pinole, CA · 18.6 kmM 0.5 · 2 km ESE of Pacifica, CA · 41.6 kmM 1.6 · 1 km ESE of Pacifica, CA · 41.6 kmM 0.5 · 4 km SE of Pacifica, CA · 43.3 km
M 1.7 · 3 km ENE of San Rafael, CA50 km57 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 · 50 km

Quake Pulse

USGS data evolution

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

Revisions2
Magnitude change+0.0M 1.7 → M 1.7
Depth change+0.0 km
Last update27202 min
2026-09-21 05:43:34 UTC2026-09-21 06:12:21 UTC

Revision history

Observed changes stored by Quake Pulse.

Mise à jourMagnitudeDepthStatus
2026-09-21 05:43:34 UTC1.6910.529999732971 kmautomatic
2026-09-21 06:12:21 UTC1.6910.529999732971 kmautomatic

Explore related context

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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