Query May 27, 2003
- Frequently, just like it happened this morning, the seismograms all over the world show frantic activity. What is the reason for that, occasional calibration? Also realized that your data seems not quite up to date, let's say comparing that with Red Puma Global Swiss. Appreciate your insights on these two important points. Thank you.
Response June 9, 2003
- Activity on instruments in a large part of the world often means a large storm is occurring which causes noise on the instruments. I'm not sure what two data sets you're looking at for comparison. You mention one URL, but not another, so I can't answer that question.
- Lisa Wald
USGS Earthquake Hazards Program