Small earthquakes shake northern Oklahoma and southern Kansas

First northern Oklahoma, then southern Kansas. Both were shaken by earthquakes on Tuesday and early Wednesday.

The first was a 2.2 magnitude earthquake Tuesday afternoon at 4:36 p.m. with an epicenter about 4 miles northeast of Medford, not far from the state line. Its depth was only about a half-mile according to the U.S. Geological Survey.

The second quake was stronger and had a 3.0 magnitude, striking at 4:47 a.m. Wednesday near the southern Kansas town of Metcalf. The town is about 43 miles west of Arkansas City.

The USGS said the quake had a depth of about 3 miles.

Both are in zones where there are heavy wastewater injection well operations.

Event type:                       Earthquake
Region:                           Kansas
Geographic coordinates:           37.071N,  97.819W
Magnitude:                        3.0
Depth:                            5 km
Universal Time (UTC):             17 Oct 2018  09:47:14
Time near the Epicenter:          17 Oct 2018  04:47:14
Local standard time in your area: 17 Oct 2018  03:47:14

Location with respect to nearby cities:
3.1 km (1.9 mi) W of Metcalf, Kansas
68.6 km (42.5 mi) SW of Haysville, Kansas
69.4 km (43.0 mi) W of Arkansas City, Kansas
71.8 km (44.5 mi) SW of Derby, Kansas
180.0 km (111.6 mi) N of Oklahoma City, Oklahoma


Event type:                       Earthquake
Region:                           Oklahoma
Geographic coordinates:           36.847N,  97.686W
Magnitude:                        2.2
Depth:                            1 km
Universal Time (UTC):             16 Oct 2018  21:36:23
Time near the Epicenter:          16 Oct 2018  16:36:23
Local standard time in your area: 16 Oct 2018  15:36:23

Location with respect to nearby cities:
6.2 km (3.8 mi) NE of Medford, Oklahoma
53.0 km (32.8 mi) NNE of Enid, Oklahoma
55.8 km (34.6 mi) WNW of Ponca City, Oklahoma
62.4 km (38.7 mi) WSW of Arkansas City, Kansas
153.8 km (95.4 mi) N of Oklahoma City, Oklahoma