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1

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Time reverse location of seismic long-period events recorded on Mt Etna (2012)

O’Brien, G. S. ; Lokmer, I. ; De Barros, L. ; [weitere]

Wiley

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Publikationsdatum: 2017-04-04

Beschreibung: We present the first application of a time reverse location method in a volcanic setting, for a family of long-period (LP) events recorded on Mt Etna. Results are compared with locations determined using a full moment tensor grid search inversion and cross-correlation method. From 2008 June 18 to July 3, 50 broad-band seismic stations were deployed on Mt Etna, Italy, in close proximity to the summit. Two families of LP events were detected with dominant spectral peaks around 0.9 Hz. The large number of stations close to the summit allowed us to locate all events in both families using a time reversal location method. The method involves taking the seismic signal, reversing it in time, and using it as a seismic source in a numerical seismic wave simulator where the reversed signals propagate through the numerical model, interfere constructively and destructively, and focus on the original source location. The source location is the computational cell with the largest displacement magnitude at the time of maximum energy current density inside the grid. Before we located the two LP families we first applied the method to two synthetic data sets and found a good fit between the time reverse location and true synthetic location for a known velocity model. The time reverse location results of the two families show a shallow seismic region close to the summit in agreement with the locations using a moment tensor full waveform inversion method and a cross-correlation location method.

Beschreibung: Published

Beschreibung: 452-462

Beschreibung: 1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive

Beschreibung: JCR Journal

Beschreibung: reserved

Schlagwort(e): Volcano seismology ; Computational seismology ; Wave propagation ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology ; 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis

Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)

Materialart: article

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2

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Time reverse location of seismic long-period events recorded on Mt Etna (2011)

O’Brien, G. S. ; Lokmer, I. ; De Barros, L. ; [weitere]

Wiley

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Publikationsdatum: 2017-04-04

Beschreibung: We present the first application of a time reverse location method in a volcanic setting, for a family of long-period (LP) events recorded on Mt Etna. Results are compared with locations determined using a full moment tensor grid search inversion and cross-correlation method. From 2008 June 18 to July 3, 50 broad-band seismic stations were deployed on Mt Etna, Italy, in close proximity to the summit. Two families of LP events were detected with dominant spectral peaks around 0.9 Hz. The large number of stations close to the summit allowed us to locate all events in both families using a time reversal location method. The method involves taking the seismic signal, reversing it in time, and using it as a seismic source in a numerical seismic wave simulator where the reversed signals propagate through the numerical model, interfere constructively and destructively, and focus on the original source location. The source location is the computational cell with the largest displacement magnitude at the time of maximum energy current density inside the grid. Before we located the two LP families we first applied the method to two synthetic data sets and found a good fit between the time reverse location and true synthetic location for a known velocity model. The time reverse location results of the two families show a shallow seismic region close to the summit in agreement with the locations using a moment tensor full waveform inversion method and a cross-correlation location method.

Beschreibung: In press

Beschreibung: (11)

Beschreibung: 1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive

Beschreibung: JCR Journal

Beschreibung: reserved

Schlagwort(e): Volcano seismology ; Computational seismology ; Wave propagation ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology ; 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis

Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)

Materialart: article

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3

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Temporal changes in seismic wave propagation towards the end of the 2002 Mt Etna eruption (2010)

Zaccarelli, L. ; Pandolfi, D. ; Bianco, F. ; [weitere]

Wiley

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Publikationsdatum: 2017-04-04

Beschreibung: Stress can undergo rapid temporal changes in volcanic environments, and this is particularly true during eruptions. We use two independent methods, coda wave interferometry (CWI) and shear wave splitting (SWS) analysis to track stress related wave propagation effects during the waning phase of the 2002 NE fissure eruption at Mt Etna. CWI is used to estimate temporal changes in seismic wave velocity, while SWS is employed to monitor changes in elastic anisotropy. We analyse seismic doublets, detecting temporal changes both in wave velocities and anisotropy, consistent with observed eruptive activity. In particular, syn-eruptive wave propagation changes indicate a depressurization of the system, heralding the termination of the eruption, which occurs three days later.

Beschreibung: Published

Beschreibung: 1779-1788

Beschreibung: 1.4. TTC - Sorveglianza sismologica delle aree vulcaniche attive

Beschreibung: JCR Journal

Beschreibung: reserved

Schlagwort(e): Interferometry ; Seismic anisotropy ; Volcano seismology ; Volcano monitoring ; 04. Solid Earth::04.06. Seismology::04.06.08. Volcano seismology

Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)

Materialart: article

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4

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Numerical and Analytical Methods for Scientists and Engineers Using Mathematica (2003)

D. Dubin

Wiley

In: Hoboken, NJ, 633 pp., Wiley, vol. 16B, no. 2, pp. 125-169, (ISBN 0-471-26610-8)

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Publikationsdatum: 2003

Schlagwort(e): Textbook of mathematics ; Data analysis / ~ processing ; Modelling ; software ; manual ; computer ; algebra ; symbolic ; mathematics

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BIBLIOGRAFIE SEISMOLOGIE

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5

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Simultaneous focal mechanism and stress tensor inversion using a genetic algorithm (1996)

J. Loohuis ; T. van_Eck

Pergamon

In: Physics and Chemistry of the Earth, Kunming, China, Pergamon, vol. 21, no. 4, pp. 267-271, pp. L13613, (ISSN: 1340-4202)

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Publikationsdatum: 1996

Schlagwort(e): Seismology ; Inversion ; Stress ; Fault plane solution, focal mechanism ; Moment tensor ; Data analysis / ~ processing

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6

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Geographic Information Systems for Geoscientists: Modelling with GIS, 414 pages (1994)

G. F. Bonham-Carter

Pergamon

In: Oxford, Pergamon, vol. 13, pp. 225, (ISBN: 0-08-042420-1)

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Publikationsdatum: 1994

Schlagwort(e): Data analysis / ~ processing ; mapping ; Textbook of geography ; Boolean ; Bayesian ; fuzzy ; Statistical investigations ; Filter- ; Modelling

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BIBLIOGRAFIE SEISMOLOGIE

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Überblick

7

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Seismic Coal Exploration, Part B: In-Seam Seismics (1994)

L. Dresen ; H. Rüter ; S. Treitel

Pergamon

In: Bochum, Pergamon, vol. 16B, no. 2, pp. 125-169, (ISBN: 3-7643-7143-9)

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Publikationsdatum: 1994

Schlagwort(e): Textbook of geophysics ; Seismics (controlled source seismology) ; Applied geophysics ; Channel waves ; SEModelling ; Data analysis / ~ processing ; Instruments ; Dispersion ; Rueter ; Ruter

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8

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Nuclear monitoring research at the Center for Seismic Studies (1991)

J. Carter ; J. Coyne ; H. Israelsson ; [weitere]

Phillips Laboratory Air Force Systems Command

In: scientific report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. 10, no. PL-TR-91-2127, pp. 1219-1222

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Publikationsdatum: 1991

Schlagwort(e): Data analysis / ~ processing ; Discrimination ; Detectors ; Nuclear explosion ; Seismology ; Attenuation ; Seismic arrays ; Anisotropy

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BIBLIOGRAFIE SEISMOLOGIE

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9

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Broadband studies of seismic sources at regional and teleseismic distances using advanced time series analysis methods (1991)

Z. A. Der ; M. R. Hirano ; K. A. Ziegler ; [weitere]

Phillips Laboratory Air Force Systems Command

In: final report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. 10, no. PL-TR-91-2059(I), pp. 231-243

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Publikationsdatum: 1991

Schlagwort(e): Broad-band ; Nuclear explosion ; Seismology ; Data analysis / ~ processing ; Source ; Time series analysis

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10

Unbekannt

Design and development of the intelligent event identification system: Design considerations and processing for regional event identification (1991)

D. R. Baumgardt ; G. B. Young ; K. A. Ziegler

Phillips Laboratory Air Force Systems Command

In: scientific report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. 11, no. PL-TR-91-2211, pp. 1-9

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Publikationsdatum: 1991

Schlagwort(e): Array configur. ; Seismology ; Detectors ; Nuclear explosion ; Expert systems ; Data analysis / ~ processing ; Discrimination

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11

Unbekannt

Regional studies with broadband data. Array analysis of regional Pn and Pg wavefields from Nevada Test Site (1991)

M. A. Leonard ; L. R. Johnson ; T. V. McEvilly

Phillips Laboratory Air Force Systems Command

In: final report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. C 560, 183 pp., no. PL-TR-91-2133, pp. 237-247, (ISBN 3-933346-037)

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Publikationsdatum: 1991

Schlagwort(e): Broad-band ; P-waves ; Nuclear explosion ; Seismology ; Seismic arrays ; Data analysis / ~ processing ; Wave propagation ; Spectrum

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12

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Development of comprehensive seismic yield estimation system for underground nuclear explosions (1991)

J. R. Murphy ; J. L. Stevens ; D. C. O'Neill ; [weitere]

Phillips Laboratory Air Force Systems Command

In: scientific report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. C 560, 183 pp., no. PL-TR-91-2161, pp. 1143-1146 (SL3.8), (ISBN 3-933346-037)

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Publikationsdatum: 1991

Schlagwort(e): Magnitude ; Energy (of earthquakes) ; Nuclear explosion ; Seismology ; Seismic arrays ; Data analysis / ~ processing

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BIBLIOGRAFIE SEISMOLOGIE

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13

Unbekannt

Analysis of high frequency seismic data (1991)

H. Israelsson ; J. Carter

Phillips Laboratory Air Force Systems Command

In: scientific report, Hanscom Air Force Base, Phillips Laboratory Air Force Systems Command, vol. C 560, 183 pp., no. PL-TR-91-2032, pp. G-257--G-273, (ISBN 3-933346-037)

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Publikationsdatum: 1991

Schlagwort(e): High frequency ... ; Seismology ; Spectrum ; Data analysis / ~ processing ; Slowness ; Nuclear explosion

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14

Unbekannt

SHIVA and OMNIDIP: New interpretation perspectives using the Six Arm Dipmeter (1989)

J. F. Goetz ; J. Tyson ; J. Garat

Halliburton Logging Services, Publ. No. EL-1049

In: Professional Paper, Six Arm Dipmeter, Dordrecht, Halliburton Logging Services, Publ. No. EL-1049, vol. 23, no. Subvol. b, pp. 1-15, (ISBN: 3-540-23712-7)

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Publikationsdatum: 1989

Schlagwort(e): Borehole geophys. ; Dipmeter, ~analysis ; Data analysis / ~ processing

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15

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SHIVAs-2u™ds0 processing: The integration of fundamental geological principles with dipmeter computations (1989)

M. B. Enderlin ; D. S. Epps ; M. A. Yuratich

Halliburton Logging Services, Publ. No. EL-1049

In: Professional Paper, Six Arm Dipmeter, Jülich, Halliburton Logging Services, Publ. No. EL-1049, vol. 4, no. 231, pp. 815-822, (ISBN 1-4020-1729-4)

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Publikationsdatum: 1989

Schlagwort(e): Borehole geophys. ; Dipmeter, ~analysis ; Data analysis / ~ processing

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16

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A fundamental approach to dipmeter analysis (1989)

M. B. Enderlin ; D. K. T. Hansen

Halliburton Logging Services, Publ. No. EL-1049

In: Professional Paper, Six Arm Dipmeter, Jülich, Halliburton Logging Services, Publ. No. EL-1049, vol. 4, no. 231, pp. 815-822, (ISBN 1-4020-1729-4)

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Publikationsdatum: 1989

Schlagwort(e): Borehole geophys. ; Dipmeter, ~analysis ; Data analysis / ~ processing

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BIBLIOGRAFIE SEISMOLOGIE

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17

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Remote Sensing. Methods and Applications (1986)

R. M. Hord

Wiley

In: New York, Wiley, vol. 2, no. XVI:, pp. 1-14, (ISBN 0-08-043751-6)

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Publikationsdatum: 1986

Schlagwort(e): Data analysis / ~ processing

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18

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Quantitative Stratigraphic Correlation (1982)

Cubitt, J. M., Ed.

Wiley

In: Chichester, Wiley, vol. 231, no. 3, pp. 2-203, (ISBN 0-470-02298-1)

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Publikationsdatum: 1982

Schlagwort(e): Data analysis / ~ processing ; Correlation ; Seismic stratigraphy ; Seismics (controlled source seismology)

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19

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Applied Regression Analysis (1981)

N. R. Draper ; H. Smith

Wiley

In: New York, 2nd Edition, 709 pp., Wiley, vol. 75, no. 2, pp. 2-203, (ISBN: 3-7643-7143-9)

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Publikationsdatum: 1981

Schlagwort(e): Correlation ; Data analysis / ~ processing ; fit ; Textbook of mathematics

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BIBLIOGRAFIE SEISMOLOGIE

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