Mathematics – Logic
Scientific paper
Jun 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974geosu...1..429d&link_type=abstract
Geophysical Surveys, Volume 1, Issue 4, pp.429-458
Mathematics
Logic
2
Scientific paper
The earthquake magnitude was introduced into seismology nearly 40 yr ago, as a purely empirical concept. After an unparalleled success in scientific and practical applications the magnitude is developing into a concept with a clearer physical meaning and a more solid theoretical foundation. The magnitude determined from the maximum particle amplitude or velocity reflects the maximum radiation power of the seismic source in the frequency band recorded on a particular seismograph. Recently developed models for seismic sources assist in classifying earthquakes according to size and spectral character. From corresponding scaling laws the relations between various magnitude scales can be established. The magnitude aims at enabling one to compare the sizes of seismic sources ranging in character from nearly aseismic events to explosions. While the former are characterized by a relatively long-peroidic radiation maximum, the latter radiate primarily short-periodic seismic energy. Tectonic earthquakes are likely to range in character between the two extreme spectral cases. A comparison of earthquake magnitude with stellar magnitude leads to analogies in spectral character between earthquakes and stars, whereby seismic sources seem to follow a distribution similar to the Hertzsprung-Russell diagram for stars. Before seismological practice can catch up with the new cognitions, improvements in the definition of the earthquake magnitude are in need.
Duda Seweryn J.
Nuttli Otto W.
No associations
LandOfFree
Earthquake magnitude scales does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Earthquake magnitude scales, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earthquake magnitude scales will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-986046