3.7-Magnitude Earthquake Recorded East of Castle Rock

Castle Rock, WA – A 3.73-magnitude earthquake rattled the area east of Castle Rock on Saturday morning, according to data from the United States Geological Survey. The quake struck at a depth of 17.62 kilometers, with its epicenter located approximately 20 kilometers east of the city. While the event prompted interest from local residents, authorities have reported no immediate damage or injuries following the tremor. The USGS recorded the event at coordinates 46.247, -122.643833333333, assigning it a significance score of 394, a metric determined by the intensity and proximity of the event to populated regions. More information on the tremor can be found on the USGS event page. In the Pacific Northwest, where seismic activity is a known factor, the USGS maintains comprehensive records to assess the frequency and behavior of regional tremors. Reviewing the historical context provided by the USGS catalog, researchers identified six earthquakes of equal or greater magnitude within a 150-kilometer radius over the past decade. Among the strongest comparable catalog events are a 4.1-magnitude quake that occurred on February 23, 2017, near Hoodsport, Washington, and a 4.0-magnitude earthquake recorded on December 14, 2017, near Scotts Mills, Oregon. Additionally, a 3.9-magnitude event was documented near Government Camp, Oregon, on June 6, 2021. Given that only six similar or larger events have occurred in this specific vicinity over the last ten years, Saturday's earthquake remains consistent with the established baseline of seismic activity for Washington state. The occurrence of such events is expected in a high-seismicity region, and while the tremor was strong enough to reach a significance threshold for reporting, it falls within the range of regional norms observed over the last decade. Emergency management officials continue to monitor geological updates as part of standard safety protocols for the region. --- This article was produced by our editorial team with assistance from automated tools. Follow us on Instagram & Facebook for more relevant news stories and SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!