explosion · reviewed by a seismologist
M 1.5ml
Earthquake near Myrtle Point, OR
USGS: 5 km NNW of Myrtle Point, Oregon
- When
- 8:01 pm PDT on 22 August 2023 ()
- Where
- 6 km (4 mi) NNW of Myrtle Point, OR · earthquakes near Myrtle Point
- Magnitude
- M 1.5 (ml)
- Depth
- -0.4 km below the surface
- Felt
- no reports yet
- Nearest
- Coos County, 10 km NE
- Nearest mapped fault
- South Slough syncline, 15 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 512 days ago
A magnitude 1.5 earthquake was recorded 6 km (4 mi) NNW of Myrtle Point, OR, at 8:01 pm PDT on 22 August 2023 (03:01 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Coquille, Bandon, Bunker Hill, Coos Bay, Barview.
USGS catalogues this as explosion, not an earthquake.
How big was it?
This earthquake released about 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
- Around the size people start to feel M 3.0 160× the energy of this one
- This earthquake M 1.5 about 5.9 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 4.5 on 2019-11-30 — about 32,000 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 43.1160, -124.1615. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Coos County, OR | 10 km (6 mi) | NE | earthquakes near Coos County |
| Curry County, OR | 72 km (45 mi) | S | earthquakes near Curry County |
| Douglas County, OR | 84 km (52 mi) | ENE | earthquakes near Douglas County |
| Josephine County, OR | 94 km (59 mi) | SSE | earthquakes near Josephine County |
| Lane County, OR | 136 km (85 mi) | NE | earthquakes near Lane County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
26 earthquakes have been recorded within 50 km since this one.
- 1.6 12 km ENE of Glasgow, Oregon
- 2.3 19 km WSW of Barview, Oregon
- 2.2 22 km WSW of Barview, Oregon
- 2.3 21 km WSW of Barview, Oregon
- 2.6 10 km NW of Langlois, Oregon
- 1.8 28 km E of Glasgow, Oregon
- 1.5 15 km ESE of Myrtle Point, Oregon
- 1.5 5 km ESE of Coquille, Oregon
- 1.5 18 km ENE of Powers, Oregon
- 2.4 6 km NE of Bandon, Oregon
- 1.5 11 km E of Glasgow, Oregon
- 2.0 21 km WSW of Bandon, Oregon
- 1.6 4 km W of Powers, Oregon
- 2.0 9 km SW of Langlois, Oregon
- 1.7 30 km E of Bunker Hill, Oregon
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.