HSU seismometer records Samoan, Indonesian and local earthquakes

Posted on October 07 2009

The analog seismometer at Humboldt State University recorded several recent significant earthquakes including the 30 September M 8.0 Samoan event, the 1 October M 7.6 Indonesian event and a local earthquake offshore of Petrolia, CA. This image shows the value of analog recorders which display wonderful images of ground shaking.

Image can be downloaded as a .pdf file and viewed with any PDF viewer such as Acrobat Reader.