Earthquake near Fredonia, AZ

USGS: 19 km SE of Fredonia, Arizona

8:29 am MST, Aug 29, 2017 · 2017-08-29 15:29 UTC · 20 km deep · released about 6.2 lb of TNT

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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: 8:29 am MST on 29 August 2017 (2017-08-29 15:29 UTC)
Where: 19 km (12 mi) SE of Fredonia, AZ · earthquakes near Fredonia
Magnitude: M 1.5 (ml)
Depth: 20 km below the surface
Felt: no reports yet
Nearest: Kane County, 72 km NE
Status: Reviewed by a seismologist

USGS · last changed by USGS 3319 days ago · we first saw it 3319 days ago

A magnitude 1.5 earthquake was recorded 19 km (12 mi) SE of Fredonia, AZ, at 8:29 am MST on 29 August 2017 (15:29 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 6.2 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 1,700,000× the energy of this one
Around the size people start to feel M 3.0 150× the energy of this one
This earthquake M 1.5 about 6.2 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 · 2 km SE of this epicentre Jul 21, 1959

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

Map loads when it scrolls into view

Epicentre 36.8117, -112.3868. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction from the epicentre
Kane County, UT	72 km (45 mi)	NE	earthquakes near Kane County
Washington County, UT	110 km (68 mi)	WNW	earthquakes near Washington County
Coconino County, AZ	122 km (76 mi)	SSE	earthquakes near Coconino County
Garfield County, UT	140 km (87 mi)	NE	earthquakes near Garfield County

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

Aftershocks so far

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

2.2 1 km NNW of Fredonia, Arizona 07:52 UTC
2.6 1 km N of Cane Beds, Arizona 16:18 UTC
2.5 32 km NNW of Supai, Arizona 23:33 UTC
1.6 17 km S of Cane Beds, Arizona 00:15 UTC
1.7 16 km W of Kanab, Utah 21:31 UTC
1.6 8 km SSW of Cane Beds, Arizona 11:06 UTC
1.5 4 km N of Cane Beds, Arizona 23:03 UTC
1.5 11 km SSE of Fredonia, Arizona 18:56 UTC
2.4 12 km E of Kanab, Utah 01:18 UTC
2.7 39 km SSE of Fredonia, Arizona 09:13 UTC
1.6 7 km SE of Fredonia, Arizona 08:25 UTC
1.7 1 km WSW of Cane Beds, Arizona 10:13 UTC
1.9 32 km NW of Bitter Springs, Arizona 05:49 UTC
1.7 3 km E of Fredonia, Arizona 21:30 UTC
2.6 34 km NNW of Supai, Arizona 08:22 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:54 UTC. 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.