The 1936 State Line earthquake (also referred to as the 1936 Milton-Freewater earthquake) struck at 23:08 Pacific time on July 15, 1936. The earthquake had an estimated magnitude of 5.8 and a maximum Mercalli intensity of VII (Very strong). The epicenter was near the Oregon/Washington state line approximately 6 miles (9.7 km) northwest of Milton-Freewater, Oregon and southwest of Walla Walla, Washington and was felt throughout the Pacific Northwest, including as far away as Bonners Ferry, Idaho near the Canadian border and by seismographs as far away as San Diego, California.