Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Fredonia, AZ
USGS: 11 km SSE of Fredonia, Arizona
- When
- 11:56 am MST on 7 August 2019 ()
- Where
- 12 km (7 mi) SSE of Fredonia, AZ · earthquakes near Fredonia
- Magnitude
- M 1.5 (md)
- Depth
- 21 km below the surface
- Felt
- no reports yet
- Nearest
- Kane County, 75 km NE
- Nearest mapped fault
- Sevier/Toroweap fault, 24 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 2613 days ago
A magnitude 1.5 earthquake was recorded 12 km (7 mi) SSE of Fredonia, AZ, at 11:56 am MST on 7 August 2019 (18:56 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Kanab.
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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.6 21 km SE of Fredonia, Arizona · 10 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 36.8487, -112.4688. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kane County, UT | 75 km (47 mi) | NE | earthquakes near Kane County |
| Washington County, UT | 101 km (63 mi) | WNW | earthquakes near Washington County |
| Coconino County, AZ | 129 km (80 mi) | SSE | earthquakes near Coconino County |
| Iron County, UT | 139 km (87 mi) | NNW | earthquakes near Iron County |
| Garfield County, UT | 142 km (88 mi) | NE | earthquakes near Garfield County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 1.9 4 km ENE of Hildale, Utah
- 1.6 15 km SSW of Cane Beds, Arizona
- 2.6 14 km S of Centennial Park, Arizona
- 2.3 17 km S of Centennial Park, Arizona
- 1.7 13 km SSW of Cane Beds, Arizona
- 1.9 22 km ESE of Fredonia, Arizona
- 1.9 3 km NE of Hildale, Utah
- 1.9 14 km E of Fredonia, Arizona
- 1.7 11 km ENE of Hildale, Utah
- 2.8 37 km SSE of Kaibab, Arizona
- 2.0 20 km ESE of Kanab, Utah
- 1.7 12 km SSE of Fredonia, Arizona
- 2.1 8 km E of Kaibab, Arizona
- 1.6 10 km SSW of Kaibab, Arizona
- 1.8 5 km N of Hildale, Utah
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.