My Seismograph Page

Here are images of my homebuilt Lehman Seismometer. The Lehman is a horizontal boom pendulum broadband seismometer. I have it set to about a 19 second period. More about the Lehman, and how to build one, can be found at the PSN website. (Note-Click on images to enlarge)

Lehman side view

Lehman top view

My Lehman seismometer enclosure with glass viewing port.

Here is Larry Cochrane's 3 channel amp/filter board I have mounted on the wall above the Lehman. Note Karl Cunningham's lo-pass filter board attached to the channel 3 output

Kona PSN station location map.

Big Island relief map.

Big Island map of all quakes in the year 2000.

Here are images of my homebuilt Lehman Seismometer. The Lehman is a horizontal boom pendulum broadband seismometer. I have it set to about a 19 second period. More about the Lehman, and how to build one, can be found at the PSN website. (Note-Click on images to enlarge)

Here are some images of the Geophone Seismometer (ko2) and vault.

The GeoSpace GS-11D 4.5Hz Vertical Geophone Seismometer.

This is my geophone vault before being covered over. The 4" ABS tee is cemented directly onto solid lava bedrock.