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Teleseisms

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Journal Article

Seismic attenuation, time delays, and raypath bending of teleseisms beneath Uturuncu volcano, Bolivia

Alexandra K. Farrell, Stephen R. McNutt, Glenn Thompson
Journal: Geosphere
Published: 01 June 2017
Geosphere (2017) 13 (3): 699–722.
DOI: https://doi.org/10.1130/GES01354.1
...Alexandra K. Farrell; Stephen R. McNutt; Glenn Thompson Abstract A set of 14 teleseismic earthquakes was studied to determine how wave propagation was affected by a presumed magma body beneath Uturuncu volcano, Bolivia. Teleseisms are suitable for study because they are relatively long period...
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Journal Article

Teleseisms as Estimators of Experimental Long‐Period Site Amplification: Application to the Po Plain (Italy) for the 2011 M w 9.0 Tohoku‐Oki (Japan) Earthquake

Marco Massa, Paolo Augliera
Published: 01 October 2013
Bulletin of the Seismological Society of America (2013) 103 (5): 2541–2556.
DOI: https://doi.org/10.1785/0120120164
...Marco Massa; Paolo Augliera Abstract This study focuses on the evaluation of teleseisms as estimators of long‐period seismic site amplification in correspondence to large alluvial basins. Using the recordings of the 11 March 2011 M w 9.0 Tohoku‐Oki, Japan, earthquake, the site response at low...
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View PDF for article title, <span class="search-highlight">Teleseisms</span> as Estimators of Experimental Long‐Period Site Amplification: Application to the Po Plain (Italy) for the 2011 M w 9.0 Tohoku‐Oki (Japan) Earthquake
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Journal Article

Recording teleseisms on the seafloor; an example from the Juan de Fuca plate

Brian T. R. Lewis, LeRoy M. Dorman
Published: 01 February 1998
Bulletin of the Seismological Society of America (1998) 88 (1): 107–116.
DOI: https://doi.org/10.1785/BSSA0880010107
...Brian T. R. Lewis; LeRoy M. Dorman Abstract In 1991, during an experiment to compare low-frequency seismic noise on a basaltic and a sediment covered seafloor ( NOBS ), we recorded teleseisms on the Juan de Fuca ridge, the Gorda ridge, and the adjacent Cascadia Basin with the SNAG ocean-bottom...
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Journal Article

Observations of direct P -wave slowness and azimuth anomalies for teleseisms recorded in Long Valley caldera, California

Lee K. Steck, William A. Prothero, Jr.
Published: 01 October 1993
Bulletin of the Seismological Society of America (1993) 83 (5): 1391–1419.
DOI: https://doi.org/10.1785/BSSA0830051391
... R. F. Wright C. (1977) . Lateral variations in upper crustal structure below the La Malbaie area from slowness, azimuth, and traveltime measurements of teleseisms , Can. J. Earth Sci. 14 , 2284 - 2293...
View PDF for article title, Observations of direct P -wave slowness and azimuth anomalies for <span class="search-highlight">teleseisms</span> recorded in Long Valley caldera, California
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Journal Article

A teleseism-specific detection algorithm for single short-period traces

John R. Evans, Stephen S. Allen
Published: 01 August 1983
Bulletin of the Seismological Society of America (1983) 73 (4): 1173–1186.
DOI: https://doi.org/10.1785/BSSA0730041173
... 3° also are detected. The algorithm is applicable to field studies using triggered seismographs to record teleseismic P waves, to worldwide network automation, and to scanning records for teleseisms. It uses two band-pass filtered data streams evolved from a single short-period vertical-component...
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Journal Article

Beyond the Teleseism: Introducing Regional Seismic and Geodetic Data into Routine USGS Finite‐Fault Modeling

Dara E. Goldberg, Pablo Koch, Diego Melgar, Sebastian Riquelme, William L. Yeck
Published: 04 August 2022
Seismological Research Letters (2022) 93 (6): 3308–3323.
DOI: https://doi.org/10.1785/0220220047
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View PDF for article title, Beyond the <span class="search-highlight">Teleseism</span>: Introducing Regional Seismic and Geodetic Data into Routine USGS Finite‐Fault Modeling
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Journal Article

A Geochemical Survey of the Telese Hypothermal Spring, Southern Italy: Sulfate Anomalies Induced by Crustal Deformation

Paolo Harabaglia, Giovanni Mongelli, Michele Paternoster
Published: 01 September 2002
Environmental Geosciences (2002) 9 (3): 89–101.
DOI: https://doi.org/10.1046/j.1526-0984.2002.93003.x
...Paolo Harabaglia; Giovanni Mongelli; Michele Paternoster Abstract This study deals with a chemical survey (major ions and Li + , F − , Br − , and ) on water samples collected from April 1998 to April 1999, from the Telese thermal spring, southern Italy, in order to investigate possible variations...
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Image
Epicenters of teleseisms used in the analysis of receiver functions (RFs).

Epicenters of teleseisms used in the analysis of receiver functions (RFs).

Published: 25 September 2017
Figure 2. Epicenters of teleseisms used in the analysis of receiver functions (RFs).
Image
Incident rays for two teleseisms (JSZ from NW and SSSZ from SE) on a cross section from B to B′ (Fig. 2) showing steep incidence angles. Red arrows show attenuated signals, black arrows unattenuated. Wavefronts of the inferred plane waves are perpendicular to the rays shown. Horizontal black lines are for reference and are 5 km apart.

Incident rays for two teleseisms (JSZ from NW and SSSZ from SE) on a cross ...

Published: 01 June 2017
Figure 5. Incident rays for two teleseisms (JSZ from NW and SSSZ from SE) on a cross section from B to B′ ( Fig. 2 ) showing steep incidence angles. Red arrows show attenuated signals, black arrows unattenuated. Wavefronts of the inferred plane waves are perpendicular to the rays shown
Image
Onset examples of (a) two teleseisms, (b) two regional earthquakes, and (c) two local earthquakes. The red markers indicate the P‐wave onset obtained using the ObsPy automatic picker.

Onset examples of (a) two teleseisms, (b) two regional earthquakes, and (c)...

Published: 31 May 2017
Figure 3. Onset examples of (a) two teleseisms, (b) two regional earthquakes, and (c) two local earthquakes. The red markers indicate the P ‐wave onset obtained using the ObsPy automatic picker.
Image
Parameterization of 2 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.

Parameterization of 2 s of the seismic event onset. (a) Teleseisms, (b) reg...

Published: 31 May 2017
Figure 6. Parameterization of 2 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.
Image
Parameterization of 1 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.

Parameterization of 1 s of the seismic event onset. (a) Teleseisms, (b) reg...

Published: 31 May 2017
Figure 5. Parameterization of 1 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.
Image
Parameterization of 4 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.

Parameterization of 4 s of the seismic event onset. (a) Teleseisms, (b) reg...

Published: 31 May 2017
Figure 7. Parameterization of 4 s of the seismic event onset. (a) Teleseisms, (b) regional earthquakes, and (c) local earthquakes.
Image
Examples of automatic P‐ and S‐phase picking for (a,c) local earthquakes and (b) teleseisms. Spectral analyses of (d) a teleseism and (e) a local earthquake overlapped by a teleseism are also shown.The color version of this figure is available only in the electronic edition.

Examples of automatic P ‐ and S ‐phase picking for (a,c) local earthquake...

Published: 16 May 2018
Figure 2. Examples of automatic P ‐ and S ‐phase picking for (a,c) local earthquakes and (b) teleseisms. Spectral analyses of (d) a teleseism and (e) a local earthquake overlapped by a teleseism are also shown.The color version of this figure is available only in the electronic edition.
Image
Plots of spectral ratios versus ACP thickness at three frequencies, showing that the spectral ratios from regional earthquakes are consistent with those from teleseisms. Dots are spectral ratios from teleseisms, crosses are from regional earthquakes, and crosses within circles are from the 2011 Mineral, Virginia, earthquake. At all frequencies, the distribution of ratios from regional earthquakes appear to have a similar distribution to those from teleseisms, indicating that teleseisms are valid for estimating spectral ratios. Dashed lines are cosine (upper) and Gaussian (lower) curves from equations (5) and (6). The color version of this figure is available only in the electronic edition.

Plots of spectral ratios versus ACP thickness at three frequencies, showing...

Published: 29 June 2021
Figure 13. Plots of spectral ratios versus ACP thickness at three frequencies, showing that the spectral ratios from regional earthquakes are consistent with those from teleseisms. Dots are spectral ratios from teleseisms, crosses are from regional earthquakes, and crosses within circles are from
Image
Illustration of the teleseism filter criteria. The horizontal axis shows the log10 of the average value for an event. The vertical axis shows the log10 of the average Pd‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark squares) as well as our replay events (larger filled squares). Teleseisms (white squares) tend to have higher values compared with local and regional earthquakes. We altered the discriminator line from Kuyuk et al. (2014) (dashed line), teleseisms are now assumed to have a minimum log(average ) of −0.1 (solid line). Some overlap between the local event and teleseism clusters exists.The color version of this figure is available only in the electronic edition.

Illustration of the teleseism filter criteria. The horizontal axis shows th...

Published: 05 July 2016
Figure 6. Illustration of the teleseism filter criteria. The horizontal axis shows the log 10 of the average value for an event. The vertical axis shows the log 10 of the average P d ‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark
Image
Illustration of the teleseism filter criteria. The horizontal axis shows the log10 of the average value for an event. The vertical axis shows the log10 of the average Pd‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark squares) as well as our replay events (larger filled squares). Teleseisms (white squares) tend to have higher values compared with local and regional earthquakes. We altered the discriminator line from Kuyuk et al. (2014) (dashed line), teleseisms are now assumed to have a minimum log(average ) of −0.1 (solid line). Some overlap between the local event and teleseism clusters exists.The color version of this figure is available only in the electronic edition.

Illustration of the teleseism filter criteria. The horizontal axis shows th...

Published: 05 July 2016
Figure 6. Illustration of the teleseism filter criteria. The horizontal axis shows the log 10 of the average value for an event. The vertical axis shows the log 10 of the average P d ‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark
Image
Illustration of the teleseism filter criteria. The horizontal axis shows the log10 of the average value for an event. The vertical axis shows the log10 of the average Pd‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark squares) as well as our replay events (larger filled squares). Teleseisms (white squares) tend to have higher values compared with local and regional earthquakes. We altered the discriminator line from Kuyuk et al. (2014) (dashed line), teleseisms are now assumed to have a minimum log(average ) of −0.1 (solid line). Some overlap between the local event and teleseism clusters exists.The color version of this figure is available only in the electronic edition.

Illustration of the teleseism filter criteria. The horizontal axis shows th...

Published: 05 July 2016
Figure 6. Illustration of the teleseism filter criteria. The horizontal axis shows the log 10 of the average value for an event. The vertical axis shows the log 10 of the average P d ‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark
Image
Illustration of the teleseism filter criteria. The horizontal axis shows the log10 of the average value for an event. The vertical axis shows the log10 of the average Pd‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark squares) as well as our replay events (larger filled squares). Teleseisms (white squares) tend to have higher values compared with local and regional earthquakes. We altered the discriminator line from Kuyuk et al. (2014) (dashed line), teleseisms are now assumed to have a minimum log(average ) of −0.1 (solid line). Some overlap between the local event and teleseism clusters exists.The color version of this figure is available only in the electronic edition.

Illustration of the teleseism filter criteria. The horizontal axis shows th...

Published: 05 July 2016
Figure 6. Illustration of the teleseism filter criteria. The horizontal axis shows the log 10 of the average value for an event. The vertical axis shows the log 10 of the average P d ‐value. We plot measurements from earthquakes with catalog magnitude≥3.0 from our real‐time dataset (dark
Image
Figure 5. Sections across the Calore River valley. (A) Topographic cross section showing the five orders of terraces analyzed. (B–D) Geological cross sections of: Montepugliano-Telese (B), Solopaca (C), and Telese-Grassano T. (Torrent) (D) areas, and related schemes not to scale. These show the geometric relationships among the Calore River terraces and the slope deposits and debris fans in the Telese-Solopaca zone (after Massa et al., 2005, modified; for the location, see Figs. 4 and 7).

Figure 5. Sections across the Calore River valley. (A) Topographic cross se...

Published: 01 March 2006
Figure 5. Sections across the Calore River valley. (A) Topographic cross section showing the five orders of terraces analyzed. (B–D) Geological cross sections of: Montepugliano-Telese (B), Solopaca (C), and Telese-Grassano T. (Torrent) (D) areas, and related schemes not to scale. These show