QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Fredonia, AZ

USGS: 39 km SSE of Fredonia, Arizona

2:13 am MST, Jul 17, 2019 · · 19 km deep · released about 340 lb of TNT

Every earthquake near Fredonia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kane County 87 kmCoconino 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
2:13 am MST on 17 July 2019 ()
Where
39 km (24 mi) SSE of Fredonia, AZ · earthquakes near Fredonia
Magnitude
M 2.7 (ml)
Depth
19 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Kane County, 87 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2555 days ago

A magnitude 2.7 earthquake was recorded 39 km (24 mi) SSE of Fredonia, AZ, at 2:13 am MST on 17 July 2019 (09:13 UTC). 1 person has reported feeling it to USGS. This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 340 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 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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:

  1. 5.6 21 km SE of Fredonia, Arizona · 20 km N 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 36.6183, -112.3572. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kane County, UT 87 km (54 mi) NNE earthquakes near Kane County
Coconino County, AZ 102 km (63 mi) SSE earthquakes near Coconino County
Washington County, UT 123 km (77 mi) NW earthquakes near Washington County

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

Aftershocks so far

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

  1. 1.9 12 km ESE of Fredonia, Arizona
  2. 1.7 11 km SE of Fredonia, Arizona
  3. 1.9 11 km SE of Fredonia, Arizona
  4. 1.9 11 km ESE of Fredonia, Arizona
  5. 1.9 12 km ESE of Fredonia, Arizona
  6. 2.1 12 km ESE of Fredonia, Arizona
  7. 1.8 Arizona
  8. 1.8 8 km E of Fredonia, Arizona
  9. 2.5 43 km NE of Supai, Arizona
  10. 1.9 16 km ESE of Fredonia, Arizona
  11. 1.8 8 km E of Fredonia, Arizona
  12. 1.6 10 km E of Fredonia, Arizona
  13. 1.6 Arizona
  14. 1.9 6 km NNE of Fredonia, Arizona
  15. 2.2 5 km SSE of Kanab, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.