Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Dublin, CA
No earthquake was likely felt in Dublin in the 24 hours to 3:23 am PST (11:23 UTC). The last one was M 1.9, 5 km (3 mi) SW, at 10:32 am PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Dublin
This page: a magnitude 1.6 earthquake was recorded 4 km (2 mi) north of Dublin, CA, at 9:11 am PDT on 29 September 2019 (16:11 UTC), 9.8 km deep.
USGS: 4km N of Dublin, CA
in San Ramon, CA · 50 km (31 mi) NNW of San Jose, CA
- When
- 9:11 am PDT on 29 September 2019 ()
- Where
- 4 km (2 mi) north of Dublin, CA · earthquakes near Dublin
- Magnitude
- M 1.6 (md)
- Depth
- 9.8 km below the surface
- Felt
- no reports yet
- Nearest
- Alameda County, 10 km S
- Nearest mapped fault
- Pleasanton fault, under 1 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2590 days ago
Earthquake alerts for Dublin, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 5 km (3 mi) from the epicentre. In Dublin, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Dublin 4 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.1 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2018-01-04 — about 16,000 times the energy of this one.
Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:
- 6.2 Near San Jose, California · 50 km SSE of this epicentre
- 5.8 The 1980 Livermore, California Earthquake · 18 km NE of this epicentre
- 5.7 15 km NE of East Foothills, California · 36 km SE of this epicentre
- 5.5 6 km NNE of East Foothills, California · 36 km SSE of this epicentre
- 5.4 9 km NE of Livermore, California · 20 km E of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 37.7365, -121.9285. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Alameda County, CA | 10 km (6 mi) | S | earthquakes near Alameda County |
| Contra Costa County, CA | 20 km (13 mi) | N | earthquakes near Contra Costa County |
| San Mateo County, CA | 53 km (33 mi) | SW | earthquakes near San Mateo County |
| Solano County, CA | 59 km (37 mi) | N | earthquakes near Solano County |
| Santa Clara County, CA | 61 km (38 mi) | SSE | earthquakes near Santa Clara County |
| San Joaquin County, CA | 62 km (38 mi) | ENE | earthquakes near San Joaquin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.8 5km SSW of Port Costa, CA
- 1.9 6km NE of Alamo, CA
- 2.0 4km N of Dublin, CA
- 1.6 4km N of Dublin, CA
- 2.1 4km N of Dublin, CA
- 1.6 2km N of Danville, CA
- 1.8 2km ESE of Alamo, CA
- 2.5 8km NNE of Alum Rock, CA
- 2.8 8km NNE of Alum Rock, CA
- 1.6 8km E of Sunol, CA
- 1.8 4km W of Dublin, CA
- 2.0 8km ENE of Alum Rock, CA
- 1.7 3km ENE of Pacheco, CA
- 1.9 5km NNW of Pittsburg, CA
- 1.7 4km NNE of Dublin, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.