Seismographs

Detailed Description
Figure 3a. Propagation paths of combinations of P, S, and L waves from an earthquake focus. Abridged from Earthquake Information Bulletin. Vol. 2, No. 5, September - October, 1970.
Sources/Usage
Public Domain.
Figure 3a. Propagation paths of combinations of P, S, and L waves from an earthquake focus. Abridged from Earthquake Information Bulletin. Vol. 2, No. 5, September - October, 1970.
Public Domain.