After an Earthquake

You have recorded something, is it an earthquake?

A large, distant earthquake will be recorded across the network


After 10-15 minutes, the parameters for a large event will be available from the USGS


No, it isn’t an earthquake.

Do these signals disrupt display and are so common that they interfere with recording earthquakes? If so try to determine what the problem might be, and seek assistance. Check out the FAQ's or ask for help in our forum.

If the signal is not disruptive to the display… this is a chance for you and your students determine the source of these signals. REAL science! Does the signal recur? Is there a pattern to the time of day when the signal occurs? These are just a few of the questions you might consider as you begin your investigation.


Yes, it is an earthquake! We have time to discuss it now (or tomorrow)!

Items like magnitude, location and news reporting may contribute to this decision.


Step 1: Estimate the distance and the location.

Step 2: Determine the magnitude of the event.

Step 3: Record event into the station log.

Step 4: Share with others.


Yes, it is an earthquake! No time to discuss it.


We heard about an earthquake, but it doesn't seem like we recorded it.