QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Home, WA

No earthquake was likely felt in Home in the 24 hours to 5:08 am PST (13:08 UTC). The last one was M 4.2, 14 km (9 mi) NNE, at 2:05 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 9,329 felt reports to USGS. Every earthquake near Home

This page: a magnitude 2.7 earthquake was recorded 3 km (2 mi) south of Home, WA, at 6:34 am PDT on 30 July 2020 (13:34 UTC), 31 km deep. 6 people have reported feeling it to USGS.

USGS: 3 km S of Home, Washington

52 km (32 mi) SW of Seattle, WA · 20 km (13 mi) WNW of Lakewood, WA

6:34 am PDT, Jul 30, 2020 · · 31 km deep · released about 320 lb of TNT

Every earthquake near Home Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mason County 33 kmThurston County 35 kmKitsap County 45 kmPierce County 51 kmKing County 75 kmLewis County 80 kmGrays Harbor County 81 kmJefferson County 84 kmIsland County 102 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
6:34 am PDT on 30 July 2020 ()
Where
3 km (2 mi) south of Home, WA · earthquakes near Home
Magnitude
M 2.7 (ml)
Depth
31 km below the surface
Felt
6 reports · strongest reported intensity II
Nearest
Mason County, 33 km WNW
Nearest mapped fault
Tacoma fault, 13 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 2225 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Home, 3 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: Longbranch, Key Center, Fox Island, Artondale, Rosedale, Wollochet.

How big was it?

This earthquake released about 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 4.1 on 2017-02-23 — about 130 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.8 The 2001 Nisqually, Washington Earthquake · 11 km SSE of this epicentre
  2. 6.7 4 km WNW of Roy, Washington · 29 km SSE of this epicentre
  3. 6.7 1 km ENE of Dash Point, Washington · 28 km ENE of this epicentre
  4. 6.1 Puget Sound region, Washington · 17 km N of this epicentre
  5. 5.8 Puget Sound area, Washington · 10 km WNW 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 47.2472, -122.7698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mason County, WA 33 km (20 mi) WNW earthquakes near Mason County
Thurston County, WA 35 km (22 mi) S earthquakes near Thurston County
Kitsap County, WA 45 km (28 mi) NNE earthquakes near Kitsap County
Pierce County, WA 51 km (32 mi) ESE earthquakes near Pierce County
King County, WA 75 km (47 mi) ENE earthquakes near King County
Lewis County, WA 80 km (50 mi) SSE earthquakes near Lewis County

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

Aftershocks so far

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

  1. 2.0 4 km E of Home, Washington
  2. 3.8 3 km WSW of Skokomish, Washington
  3. 1.6 12 km S of Shelton, Washington
  4. 1.6 0 km WSW of Parkwood, Washington
  5. 2.5 1 km NE of Enetai, Washington
  6. 1.5 1 km E of Dash Point, Washington
  7. 1.6 10 km S of Shelton, Washington
  8. 1.6 2 km WNW of Bethel, Washington
  9. 2.5 1 km E of Bethel, Washington
  10. 1.7 Puget Sound region, Washington
  11. 1.6 11 km S of Shelton, Washington
  12. 1.7 4 km SSE of Bainbridge Island, Washington
  13. 2.2 5 km SE of Bainbridge Island, Washington
  14. 1.5 2 km ENE of Enetai, Washington
  15. 2.3 1 km SSE of Enetai, Washington

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.