A few examples of what you can ask Wolfram|Alpha about:
Earthquake Data
get data about recent earthquakes
get earthquake data for a specified time
get earthquake data for a specified location
specify location and time
get earthquake data near a specified landmark
Earthquake Magnitudes
do earthquake magnitude computations
find definitions of magnitudes
Earthquake Intensity
get information on earthquake intensity scales
Earthquake Characteristics
compute ground motion due to earthquakes
compute typical characteristics of earthquakes
Seismic Travel Times
get information about seismic wave travel times
Earthquake Visualizations
visualize earthquake moment tensors