Lesson 1:  Picking P phases with dbpick

In this first lesson you will learn to pick the first arrival P phase with the dbpick program and how to use this information to identify other teleseismic phases.  We will be using data from an array of seismic stations in southern California called Anza located in southern California.  Here is a crude map of most of the stations:

For this exercise we are going to using a set of well recorded teleseismic events that sweep across this modern broadband array of station.  Here, in fact, is a map of where the events in the data set you will work with are located.

Notice that these are all fairly large earthquakes located some distance from California.  They are "teleseisms" because they are located more than 1000 km from this group of stations.

Follow the following sequence of steps to complete this exercise.