Knoxville Earthquake

Knoxville had a genuine earthquake at roughly 12:30am on April 11, 2012! Houses shook and a loud boom was reported in Rocky Hill, South Knoxville, and Seymour. #knoxquake

Type: Earthquake
27 minutes ago
Magnitude: 2.2
DateTime: Wednesday April 11 2012, 04:39:14 UTC
Region: eastern Tennessee
Depth: 4.9 km
Source: USGS Feed

[Source, Global Incident Map]

[Source, Folkworm]

Earthquake Details

This event has been reviewed by a seismologist.

Magnitude 2.2
Date-Time

Wednesday, April 11, 2012 at 04:39:14 UTC
Wednesday, April 11, 2012 at 12:39:14 AM at epicenter
Time of Earthquake in other Time Zones

Location 35.756°N, 83.825°W
Depth 4.9 km (3.0 miles)
Region EASTERN TENNESSEE
Distances 13 km (8 miles) E of Maryville, Tennessee
24 km (14 miles) SSE of Knoxville, Tennessee
49 km (30 miles) SE of Oak Ridge, Tennessee
275 km (170 miles) E of NASHVILLE, Tennessee
Location Uncertainty horizontal +/- 10.3 km (6.4 miles); depth +/- 3.1 km (1.9 miles)
Parameters NST= 16, Nph= 29, Dmin=12.2 km, Rmss=1.35 sec, Gp= 50°,
M-type=”Nuttli” surface wave magnitude (mbLg), Version=4
Source

Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)

Event ID usc000903d

[Source, USGS]

Upgraded:

Earthquake Details

This event has been reviewed by a seismologist.
Magnitude
2.3
Date-Time
Wednesday, April 11, 2012 at 04:39:12 UTC
Wednesday, April 11, 2012 at 12:39:12 AM at epicenter
Time of Earthquake in other Time Zones
Location
35.797°N, 83.838°W
Depth
19.4 km (12.1 miles)
Region
EASTERN TENNESSEE
Distances
10 km (6 miles) E (85°) from Eagleton Village, TN
10 km (6 miles) ESE (116°) from Rockford, TN
10 km (6 miles) SW (215°) from Seymour, TN
22 km (14 miles) SSE (154°) from Knoxville, TN
232 km (144 miles) NNE (13°) from Atlanta, GA
Location Uncertainty
horizontal +/- 0.4 km (0.2 miles); depth +/- 0.8 km (0.5 miles)
Parameters
NST= 18, Nph= 24, Dmin=16 km, Rmss=0.14 sec, Gp= 86°,
M-type=duration magnitude (Md), Version=B
Source
Southeast U.S. Seismic Network
Event ID
se041112a

[Source, USGS]

In 2007, Knoxville ran practice drills in preparation for a 7.7 earthquake. Thankfully, it hasn’t come yet!

Possibly linked: Apparently there was a magnitude 8.6 earthquake off Aceh, Indonesia at the same time. Tsunami warning issued. See also usgs.

[Source, Global Incident Map]