2026-07-18T08:38:15.09Z35.502833333333-90.49355.12manualconfirmedUSGS1.81md1Origin/20260718133549.93751.147281Magnitude/20260718133549.937578.147282USGS7 km WSW of Marked Tree, Arkansasregion namenmcatalognm60625351contributorID