• Travel Time calculations

Reference library

• Basic Seismology
• Seismic Sensors & Calibration
• Seismic Training Manual  1960
• Seismic Vault Construction

• Theory of the Earth by Don L Anderson
• selected chapters:
• The Crust and Upper Mantle Chapter 3
• The Lower Mantle and Core Chapter 4

• Poster of the Moro Gulf, Mindanao, Philippines Earthquakes of 23 July 2010 - Magnitudes 7.3, 7.6, 7.4

• New Manual of Seismological Observatory Practice (2002)
• This is a wealth of information including exercises of earthquake magnitude determination and location, highly recommended

Articles by Edward Cranswick, one of the founding fathers of the PSN - Public Sesimic Netork

• ON THE ROAD TO THE PUBLIC SEISMIC NETWORK                              
• Edward Cranswick  27 DEC 1996

• Recording Ground Motions Where the People Live