Three events in June and August of 2021 (2021/06/21, 2021/06/27 and 2021/08/15) were reported inside the Baltimore beltway in the Maryland Piedmont Baltimore Precambrian Gneiss (above the fall line). Station coverage is sparse in the Baltimore urban area and the closest station used to locate, SDMD, is 14-18 km from the reported epicenters. Multiple RaspberryShakes recorded data within 50 km and the closest, R0ECF, at 9-10 km. Comparison of waveforms at R0ECF and SDMD indicate that all three events were very closely related. Relocation using P & S waves from 5 RaspberryShakes places all events within 1 km of each other. ML magnitudes of the events were recomputed using the relocations and local stations. These events demonstrate values of citizen scientist hosted seismic stations such in this sparsely monitored urban area.
Session: Earthquakes, Lithospheric Structure, and Dynamics in Stable Continental Region [Poster]
Type: Poster
Date: 4/17/2025
Presentation Time: 08:00 AM (local time)
Presenting Author: Keith
Student Presenter: No
Invited Presentation:
Poster Number: 67
Authors
Keith McLaughlin
Presenting Author
Corresponding Author
mclaughlin0kl@me.com
Leidos, Inc.
Three Earthquakes in the Baltimore Gneiss
Category
Earthquakes, Lithospheric Structure, and Dynamics in Stable Continental Regions