caa a22 4500 477047572 CHVBK 20180405111334.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00876494 doi (NATIONALLICENCE)springer-10.1007/BF00876494 Regional moments, energy levels, and a new discriminant [Elektronische Daten] [Lian-She Zhao, Donald Helmberger] Teleseismic observations of explosions tend to be richer in short-period energy than are earthquakes, thus the effectiveness of them b ∶M s discriminant. At regional distances the same basic separation occurs for smaller events in terms ofM L ∶M 0 (Woods et al., 1993) andm b ∶M 0 (Patton andWalter, 1993). While these studies demonstrate the basic differences in excitation, they suffer in practical application because of the detailed information required in the retrieval ofM 0 . In this paper, we introduce a new method of discrimination, based on the energy strength (M E ) from broadband regional records that appears to be effective and efficient. In this method all events are processed as earthquakes, and explosions are distinguished by their stronger energy levels relative to their long-period amplitudes. Results from 29 events recorded by TERRAscope, sampling 15 explosions from NTS and 14 earthquakes from the southwestern United States, are represented, indicating complete separation (45 data points).M L =3.6 is the smallest event examined to date but the method can probably be extended to even smaller levels in calibrated regions. Birkhäuser Verlag, 1996 Energy discriminant nationallicence magnitude nationallicence amplitude nationallicence earthquake nationallicence explosion nationallicence Zhao Lian-She Institute for Geophysics, The University of Texas at Austin, 8701 N. MoPac Expressway, 78759-8397, Austin, TX, USA aut Helmberger Donald Seismological Laboratory 252-21, California Institute of Technology, 91125, Pasadena, CA, USA aut pure and applied geophysics Birkhäuser-Verlag 146/2(1996-03-01), 281-304 0033-4553 146:2<281 1996 146 24 https://doi.org/10.1007/BF00876494 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00876494 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhao Lian-She Institute for Geophysics, The University of Texas at Austin, 8701 N. MoPac Expressway, 78759-8397, Austin, TX, USA aut NATIONALLICENCE 700 1- Helmberger Donald Seismological Laboratory 252-21, California Institute of Technology, 91125, Pasadena, CA, USA aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 146/2(1996-03-01), 281-304 0033-4553 146:2<281 1996 146 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer