QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near McKinleyville, CA

No earthquake was likely felt in McKinleyville in the 24 hours to 9:31 pm PST (05:31 UTC). The last one was M 5.0, 139 km (86 mi) WSW, at 8:56 pm PST on 4 November 2026, estimated intensity II (weak) in town; 145 felt reports to USGS. Every earthquake near McKinleyville

This page: a magnitude 2.3 earthquake was recorded 15 km (10 mi) west of McKinleyville, CA, at 7:31 pm PDT on 25 July 2019 (02:31 UTC), 23 km deep. 1 person has reported feeling it to USGS.

USGS: 15km W of McKinleyville, CA

7:31 pm PDT, Jul 25, 2019 · · 23 km deep · released about 88 lb of TNT

Every earthquake near McKinleyville Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Humboldt County 38 kmDel Norte County 96 kmTrinity County 103 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
7:31 pm PDT on 25 July 2019 ()
Where
15 km (10 mi) west of McKinleyville, CA · earthquakes near McKinleyville
Magnitude
M 2.3 (md)
Depth
23 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Humboldt County, 38 km SE
Nearest mapped fault
Mad River fault, 14 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 2665 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In McKinleyville, 15 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.

Earthquakes near other towns within 30 km: Eureka, Arcata, Bayview, Myrtletown, Bayside, Cutten.

How big was it?

This earthquake released about 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 4.8 on 2016-07-21 — about 5,600 times the energy of this one.

Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.2 The 1980 Eureka, California Earthquake · 22 km N of this epicentre
  2. 6.5 The 1932 Eureka, California Earthquake · 21 km S of this epicentre
  3. 6.5 The 2010 Eureka, California Earthquake · 46 km SW of this epicentre
  4. 6.4 Northwest of Eureka, California · 20 km WNW of this epicentre
  5. 6.4 The 1954 Eureka-Arcata, California Earthquake · 34 km ESE 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 40.9200, -124.2807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Humboldt County, CA 38 km (24 mi) SE earthquakes near Humboldt County
Del Norte County, CA 96 km (59 mi) NNE earthquakes near Del Norte County
Trinity County, CA 103 km (64 mi) ESE earthquakes near Trinity County

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

Aftershocks so far

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

  1. 1.8 24km ENE of Hydesville, CA
  2. 2.0 11km SSW of Ferndale, CA
  3. 2.2 57km WNW of Bayview, CA
  4. 1.7 14km ESE of Pine Hills, CA
  5. 2.4 11km SSW of Ferndale, CA
  6. 1.9 9km W of Rio Dell, CA
  7. 2.0 11km SSW of Ferndale, CA
  8. 1.5 10km SSW of Ferndale, CA
  9. 1.8 16km NW of Bayview, CA
  10. 2.8 11km NW of Ferndale, CA
  11. 1.6 11km SSW of Ferndale, CA
  12. 1.9 8km S of Ferndale, CA
  13. 1.9 8km S of Ferndale, CA
  14. 2.8 26km W of Humboldt Hill, CA
  15. 2.2 33km WNW of Bayview, 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.