Catalogs of Earthquakes: Record of seismicity on global, regional, and local scales

Outline

What are earthquakes

Recording earthquakes

Measuring size of an earthquake

Magnitude scales

Seismic Moment, MO

Magnitude scale MW

Gutenberg-Richter relation

Global Number of Earthquakes vs. Time

Where earthquakes occur

Average annual number of magnitude 4.0 or greater earthquakes at a 11 cell (normalized to its area on equator)

How to get information on earthquakes

The US GS/NEIC Global Hypocenter Data Base

Catalog Errors

What can we learn from a catalog of earthquakes

Are earthquakes predictable?

Real-time monitoring ( http://www.mitp.ru or http://www.phys.ualberta.ca/mirrors/mitp )

19/09/1985 Mexico Earthquake

20/10/1986 Kermadek Earthquake

23/05/1989 Macquarie Earthquake

08/08/1993 Guam Earthquake

09/06/1994 Bolivia Deep Earthquake

04/10/1994 Shikotan Earthquake

07/04/1995 Samoa Earthquake

03/12/1995 Iturup Earthquake

17/02/1996 New Guinea Earthquake

25/03/1998 Balleny Sea Earthquake

04/06/2000 South Sumatera Earthquake

Seismic Roulette

Seismic Roulette

Worldwide performance of earthquake prediction algorithms M8 and M8-MSc: Magnitude 8.0 or more.

Benioff strain release in 20 years before the great shocks

Benioff strain release in 20 years before great shocks (Log-scale)

Aftershock sequences of the great shocks

Activity in 10 years before + 3 years after the great shocks

Aftershock sequences of the great shocks (summary)

Conclusions

Some References