shaking, perhaps, or the shaking will be somewhat attenuated. the problem might be a coastal tsunami like in chile. >> let's go to jacarta, indonesia. this is obviously where we saw the tsunami a little farther up north. >> this is part of what seismologists call -- >> they have a line running down -- >> they have a line running down the center of sumatra. this is the island of java. the earthquake in 2004 occurred right around up here, and this basically, this whole region has volcanos. it has earthquakes and we know there have been large earthquakes in the past. >> how can you tell that a tsunami is the bigger threat than the earthquake might be? >> that's really rough. we know from past history that earthquakes along faults such as off indonesia do cause tsunamis. we have very little evidence of