QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

Earthquake near Newark, CA

No earthquake was likely felt in Newark in the 24 hours to 9:30 am PST (17:30 UTC). The last one was M 3.5, 53 km (33 mi) ESE, at 7:21 am PDT on 27 September 2026, estimated intensity II (weak) in town; 8 felt reports to USGS. Every earthquake near Newark

This page: a magnitude 2.2 earthquake was recorded 5 km (3 mi) south-southeast of Newark, CA, at 9:03 pm PDT on 3 June 2020 (04:03 UTC), 7.8 km deep. 7 people have reported feeling it to USGS.

USGS: 5km SSE of Newark, CA

6 km (4 mi) W of Fremont, CA

9:03 pm PDT, Jun 3, 2020 · · 7.8 km deep · released about 64 lb of TNT

Every earthquake near Newark Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 20 kmSan Mateo County 33 kmSanta Clara County 41 kmContra Costa County 48 kmSanta Cruz County 53 kmSan Joaquin County 82 kmSolano County 87 kmStanislaus County 89 kmMarin County 90 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
9:03 pm PDT on 3 June 2020 ()
Where
5 km (3 mi) south-southeast of Newark, CA · earthquakes near Newark
Magnitude
M 2.2 (md)
Depth
7.8 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Alameda County, 20 km NNE
Nearest mapped fault
Hayward fault, 7 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 1821 days ago

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 17 km (11 mi) from the epicentre. In Newark, 5 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: Newark 5 km, intensity II · Fremont 7 km, intensity II · Milpitas 11 km, intensity II · Union City 12 km, intensity II · East Palo Alto 12 km, intensity II · Palo Alto 13 km, intensity II · Mountain View 13 km, intensity II · Sunnyvale 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 64 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 64 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 1,700 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 Near San Jose, California · 28 km SE of this epicentre
  2. 6.2 The 1984 Morgan Hill, California Earthquake · 35 km SE of this epicentre
  3. 6.1 Near San Jose, California · 37 km SSE of this epicentre
  4. 5.8 7 km NNW of Boulder Creek, California · 35 km SSW of this epicentre
  5. 5.8 The 1980 Livermore, California Earthquake · 44 km NNE 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 37.4892, -122.0087. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Alameda County, CA 20 km (12 mi) NNE earthquakes near Alameda County
San Mateo County, CA 33 km (21 mi) WSW earthquakes near San Mateo County
Santa Clara County, CA 41 km (25 mi) SE earthquakes near Santa Clara County
Contra Costa County, CA 48 km (30 mi) N earthquakes near Contra Costa County
Santa Cruz County, CA 53 km (33 mi) S earthquakes near Santa Cruz County
San Joaquin County, CA 82 km (51 mi) NE earthquakes near San Joaquin County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

52 earthquakes have been recorded within 50 km since this one.

  1. 1.8 10km ENE of Milpitas, CA
  2. 1.5 9km WSW of Mountain House, CA
  3. 1.6 8km WSW of Mountain House, CA
  4. 1.6 8km NE of Alum Rock, CA
  5. 2.1 4km WSW of Los Altos Hills, CA
  6. 2.1 10km NE of Milpitas, CA
  7. 1.6 10km NE of Milpitas, CA
  8. 2.6 8km WSW of Saratoga, CA
  9. 2.1 10km NE of Milpitas, CA
  10. 2.9 10km NE of Milpitas, CA
  11. 3.5 10km NE of Milpitas, CA
  12. 1.6 4km SSW of Newark, CA
  13. 2.6 6km SW of Clayton, CA
  14. 2.5 6km NE of Alamo, CA
  15. 1.9 6km E of Fremont, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.