Orono seismograph record for the Chilean quake
On Saturday February 27th at 3:34 am local time (6:34 UTC) a magnitude 8.8 earthquake occurred offshore of the west coast of Chile. The primary earthquake was located 105 km (65 miles) WSW of the city of Talca, Chile, and has been followed by numerous aftershocks. US Geological Survey calculations indicate that the earthquake’s focus (or hypocenter) was approximately 22 miles beneath the surface, and is associated with the subduction zone that runs the length of the South American continent. Seismic waves from the quake were recorded at the UMaine seismometer in Orono 12 minutes after the earthquake’s initiation.
Below are the short- and long-period frequency records from the UMaine seismometer. The numbers on the left-hand axis refer to hours in Eastern Daylight Time (Orono local time) and those on the right to hours in UTC (Coordinated Universal Time). Divisions on the horizontal axis divide each hour into minutes.
The UMaine seismometer is located on the Orono campus, and is part of the New Engalnd Seismic Network operated by Weston Observatory.
- Short wavelength
- Long wavelength
