HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (43) Citing Articles via Google Scholar Google Scholar Articles by Malagnini, L. Articles by Di Bona, M. Search for Related Content GeoRef GeoRef Citation

Ground-Motion Scaling in the Apennines (Italy)

Istituto Nazionale di Geofisica
Via di Vigna Murata, 605
00143 Rome, Italy
(L. M., M. D.)

Department of Earth and Atmospheric Sciences
Saint Louis University
3507 LaClede Avenue
St. Louis, Missouri 63103
(L. M., R. B. H.)

Regressions over a data set of broadband seismograms are performed to quantify the attenuation of the ground motion in the Apennines (Italy), in the 0.25–5.0 Hz frequency band. The data set used in this article consists of over 6000 horizontal-component seismograms from 446 events, with magnitude ranging from M_w 2 to M_w = 6.0. Waveforms were collected during recent field experiments along the Apennines. Data from two MedNet broadband stations, located in central and southern Apennines, were also used.

Seismograms are bandpass-filtered around a set of sampling frequencies, and the logarithms of their peak values are written as

EXC(f, r_ref) is the excitation term for the ground motion at the hypocentral distance r_ref. SITE(f) represents the distortion of the seismic spectra induced by the shallow geology at the recording site. D(r, r_ref, f) includes the effects of the geometrical spreading, g(r), and of a frequency-dependent crustal attenuation Q. It is determined as a piecewise linear function, allowing to consider complex behavior of the regional attenuation.

A first estimate of D(r, r_ref, f) is obtained using a coda normalization technique (Aki, 1980; Frankel et al., 1990) and used as a starting model in the inversion of the peak values. Then, by trial and error, the empirical D(r, r_ref, f) is fitted using a trilinear geometrical spreading, with crossover distances at 30 and 80 km, and the crustal parameter

These results suggest a low-Q crust in the entire Apennines in the 0.25–5.0 Hz range, implying that the seismic hazard in the region may be dominated by the local seismicity.

The final section is devoted to highlight the limitations of the formula proposed by Console et al. (1988) to estimate duration magnitudes M_d in Italy.

This article has been cited by other articles:

				M. Macias, G. M. Atkinson, and D. Motazedian Ground-Motion Attenuation, Source, and Site Effects for the 26 September 2003 M 8.1 Tokachi-Oki Earthquake Sequence Bulletin of the Seismological Society of America, August 1, 2008; 98(4): 1947 - 1963. [Abstract] [Full Text] [PDF]

				R. R. Castro, C. Condori, O. Romero, C. Jacques, and M. Suter Seismic Attenuation in Northeastern Sonora, Mexico Bulletin of the Seismological Society of America, April 1, 2008; 98(2): 722 - 732. [Abstract] [Full Text] [PDF]

				L. Malagnini, K. Mayeda, R. Uhrhammer, A. Akinci, and R. B. Herrmann A Regional Ground-Motion Excitation/Attenuation Model for the San Francisco Region Bulletin of the Seismological Society of America, June 1, 2007; 97(3): 843 - 862. [Abstract] [Full Text] [PDF]

				R. Ortega and M. Gonzalez Seismic-Wave Attenuation and Source Excitation in La Paz-Los Cabos, Baja California Sur, Mexico Bulletin of the Seismological Society of America, April 1, 2007; 97(2): 545 - 556. [Abstract] [Full Text] [PDF]

				B. Castello, M. Olivieri, and G. Selvaggi Local and Duration Magnitude Determination for the Italian Earthquake Catalog, 1981-2002 Bulletin of the Seismological Society of America, February 1, 2007; 97(1B): 128 - 139. [Abstract] [Full Text] [PDF]

				R. R. Castro, G. Franceschina, F. Pacor, D. Bindi, and L. Luzi Analysis of the Frequency Dependence of the S-Wave Radiation Pattern from Local Earthquakes in Central Italy Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 415 - 426. [Abstract] [Full Text] [PDF]

				L. Malagnini, P. Bodin, K. Mayeda, and A. Akinci Unbiased Moment-Rate Spectra and Absolute Site Effects in the Kachchh Basin, India, from the Analysis of the Aftershocks of the 2001 Mw 7.6 Bhuj Earthquake Bulletin of the Seismological Society of America, April 1, 2006; 96(2): 456 - 466. [Abstract] [Full Text] [PDF]

				S. Drouet, A. Souriau, and F. Cotton Attenuation, Seismic Moments, and Site Effects for Weak-Motion Events: Application to the Pyrenees Bulletin of the Seismological Society of America, October 1, 2005; 95(5): 1731 - 1748. [Abstract] [Full Text] [PDF]

				L. Scognamiglio, L. Malagnini, and A. Akinci Ground-Motion Scaling in Eastern Sicily, Italy Bulletin of the Seismological Society of America, April 1, 2005; 95(2): 568 - 578. [Abstract] [Full Text] [PDF]

				P. L. Bragato and A. Tento Local Magnitude in Northeastern Italy Bulletin of the Seismological Society of America, April 1, 2005; 95(2): 579 - 591. [Abstract] [Full Text] [PDF]

				R. Ortega and L. Quintanar A Study of the Local Magnitude Scale in the Basin of Mexico: Mutually Consistent Estimates of log A0 and Ground-Motion Scaling Bulletin of the Seismological Society of America, April 1, 2005; 95(2): 605 - 613. [Abstract] [Full Text] [PDF]

				High-Frequency Earthquake Ground-Motion Scaling in Utah and Yellowstone Bulletin of the Seismological Society of America, October 1, 2004; 94(5): 1644 - 1657.

				Ground-Motion Scaling in the Kachchh Basin, India, Deduced from Aftershocks of the 2001 Mw 7.6 Bhuj Earthquake Bulletin of the Seismological Society of America, October 1, 2004; 94(5): 1658 - 1669.

				Estimating Absolute Site Effects Bulletin of the Seismological Society of America, August 1, 2004; 94(4): 1343 - 1352.

				R. R. Castro, F. Pacor, D. Bindi, G. Franceschina, and L. Luzi Site Response of Strong Motion Stations in the Umbria, Central Italy, Region Bulletin of the Seismological Society of America, April 1, 2004; 94(2): 576 - 590. [Abstract] [Full Text] [PDF]

				A. Tertulliani, A. Rossi, and R. Di Giovambattista Reappraisal of the 22 October 1919 Central Italy Earthquake Bulletin of the Seismological Society of America, June 1, 2003; 93(3): 1298 - 1305. [Abstract] [Full Text] [PDF]

				Earthquake Ground-Motion Scaling in Central Mexico between 0.7 and 7 Hz Bulletin of the Seismological Society of America, February 1, 2003; 93(1): 397 - 413.

				Spectral Shear-Wave Ground-Motion Scaling in Switzerland Bulletin of the Seismological Society of America, February 1, 2003; 93(1): 414 - 429.

				Characteristics of the Ground Motion in Northeastern Italy Bulletin of the Seismological Society of America, August 1, 2002; 92(6): 2186 - 2204.

				High-Frequency Ground Motion in the Erzincan Region, Turkey: Inferences from Small Earthquakes Bulletin of the Seismological Society of America, December 1, 2001; 91(6): 1446 - 1455.

				Ground-Motion Scaling in the Region of the 1997 Umbria-Marche Earthquake (Italy) Bulletin of the Seismological Society of America, August 1, 2000; 90(4): 1041 - 1051.

				Regional Ground-Motion Scaling in Central Europe Bulletin of the Seismological Society of America, August 1, 2000; 90(4): 1052 - 1061.