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Seismograph studies

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Journal Article

An electronic long-period seismograph for surface-wave dispersion studies Available to Purchase

E. Wielandt, W. Mitronovas
Published: 01 June 1976
Bulletin of the Seismological Society of America (1976) 66 (3): 987–996.
DOI: https://doi.org/10.1785/BSSA0660030987
.... (1971) . Design active filters with less effort . Electronic Design 1 , 82 - 85 . Bulletin of the Seismological Society of America. Vol. 66, No. 3, pp. 987 996. June 1976 AN ELECTRONIC LONG-PERIOD SEISMOGRAPH FOR SURFACE-WAVE DISPERSION STUDIES BY E. WIELANDT AND W . MITRONOVAS ABSTRACT A long...
View PDF for article title, An electronic long-period <span class="search-highlight">seismograph</span> for surface-wave dispersion <span class="search-highlight">studies</span>
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Journal Article

Application of a seismograph network and electronic computer in near earthquake studies Available to Purchase

J. Cleary, H. Doyle
Published: 01 July 1962
Bulletin of the Seismological Society of America (1962) 52 (3): 673–682.
DOI: https://doi.org/10.1785/BSSA0520030673
...J. Cleary; H. Doyle Abstract A description is given of the application of a close network of seismograph stations and of an IBM 650 computer program to the study of a sequence of near earthquakes in southeastern Australia. The epicenters, depths, and origin times of a moderate sized earthquake...
View PDF for article title, Application of a <span class="search-highlight">seismograph</span> network and electronic computer in near earthquake <span class="search-highlight">studies</span>
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Journal Article

Studies in fault detection with the reflection seismograph Available to Purchase

Martin Cyrus Kelsey
Journal: Geophysics
Published: 01 January 1949
Geophysics (1949) 14 (1): 21–28.
DOI: https://doi.org/10.1190/1.1437469
View PDF for article title, <span class="search-highlight">Studies</span> in fault detection with the reflection <span class="search-highlight">seismograph</span>
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Journal Article

Study of Seismograph Characteristics Available to Purchase

Published: 01 March 1934
Seismological Research Letters (1934) 5 (4): 5.
DOI: https://doi.org/10.1785/gssrl.5.4.5a
View PDF for article title, <span class="search-highlight">Study</span> of <span class="search-highlight">Seismograph</span> Characteristics
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Journal Article

A study of a well gauge as a seismograph Available to Purchase

F. B. Blanchard, Perry Byerly
Published: 01 October 1935
Bulletin of the Seismological Society of America (1935) 25 (4): 313–321.
DOI: https://doi.org/10.1785/BSSA0250040313
... in Artesian Wells , Earthquake Notes , 6 : 16 - 17 (1934) . A STUDY OF A WELL GAUGE AS A SEISMOGRAPH* By F. B. BLANCItARDand PERaY BYERLY INTRODUCTION IT HAS BEEN KNOWNfor some time that the water surface in deep wells re- sponds to the effects of large, distant earthquakes in a way that suggests...
View PDF for article title, A <span class="search-highlight">study</span> of a well gauge as a <span class="search-highlight">seismograph</span>
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Journal Article

Preliminary results of a study of seismograph sensitivity requirements Available to Purchase

Patrick E. Haggerty, R. W. Olson
Journal: Geophysics
Published: 01 January 1948
Geophysics (1948) 13 (1): 86–91.
DOI: https://doi.org/10.1190/1.1437379
...Patrick E. Haggerty; R. W. Olson Abstract The ambient ground-noise level is one of the most important factors in determining sensitivity requirements for a seismograph system. This paper, on the basis of eighty-one measurements in three areas in Texas, concludes that for these areas minimum ambient...
View PDF for article title, Preliminary results of a <span class="search-highlight">study</span> of <span class="search-highlight">seismograph</span> sensitivity requirements
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Journal Article

Petrogenesis and geochemical characteristics of Plio-Quaternary alkali basalts from the Qorveh–Bijar volcanic belt, Kurdistan Province, NW Iran Available to Purchase

Nafiseh Salehi, Ashraf Torkian, Tanya Furman, Petrus le Roux
Published: 17 February 2023
Geological Magazine (2023) 160 (5): 888–904.
DOI: https://doi.org/10.1017/S0016756823000018
... magma of the Qorveh–Bijar. The geochemical evidence for lithospheric foundering, and hence drip magmatism, in the Qorveh–Bijar volcanic belt is supported by seismographic studies indicating thinned lithosphere beneath the study area. Alkali basaltic magmas are observed in several tectonic environments...
FIGURES | View All (12)
View PDF for article title, Petrogenesis and geochemical characteristics of Plio-Quaternary alkali basalts from the Qorveh–Bijar volcanic belt, Kurdistan Province, NW Iran
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Journal Article

Are foreshocks distinctive? Evidence from the 1966 Parkfield and the 1975 Oroville, California sequences Available to Purchase

W. H. Bakun, T. V. McEvilly
Published: 01 August 1979
Bulletin of the Seismological Society of America (1979) 69 (4): 1027–1038.
DOI: https://doi.org/10.1785/BSSA0690041027
.... (1965) . Magnetic-tape data-acquisition system: Final report to the Advanced Research Projects Agency—A study of focal mechanisms and aftershock characteristics of small earthquakes , Seismographic Station , University of California , 15 - 42 . Sadovsky...
View PDF for article title, Are foreshocks distinctive? Evidence from the 1966 Parkfield and the 1975 Oroville, California sequences
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Journal Article

THE BLIND ZONE PROBLEM IN ENGINEERING GEOPHYSICS Available to Purchase

Joshua L. Soske
Journal: Geophysics
Published: 01 April 1959
Geophysics (1959) 24 (2): 359–365.
DOI: https://doi.org/10.1190/1.1438597
...Joshua L. Soske Abstract General discussions of the so-called “blind zone” in refraction seismograph studies have beenregarded by most practical geophysicists as an academic treatment of a subject having little, if any, field application. The purpose of this paper is to illustrate...
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Journal Article

Pn velocity study using a temporary seismographic network in the Shillong Plateau, Northeast India Available to Purchase

J. R. Kayal, Reena De
Published: 01 October 1987
Bulletin of the Seismological Society of America (1987) 77 (5): 1718–1727.
DOI: https://doi.org/10.1785/BSSA0770051718
...J. R. Kayal; Reena De Abstract Seismic P -wave velocity ( Pn ) of the uppermost mantle beneath the Shillong Plateau has been studied using a temporary seismographic network. Refracted Pn arrivals of shallow distant earthquakes ( M > 3.0) recorded at pairs of stations, lying within 2° azimuthal...
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Journal Article

A comprehensive study of long-period (20 to 200 seconds) earth noise at the high-gain worldwide seismograph stations Available to Purchase

Andrew J. Murphy, John M. Savino
Published: 01 December 1975
Bulletin of the Seismological Society of America (1975) 65 (6): 1827–1862.
DOI: https://doi.org/10.1785/BSSA0650061827
... to be drawn from these data. A STUDY OF LONG-PERIOD EARTH NOISE AT HGLP SEISMOGRAPH STATIONS 1831 DATA The purpose of this section is to familiarize the reader with the H G L P data and with the characteristics of the HGLP seismographs. The response characteristics of the instru- ments are shaped to resemble...
View PDF for article title, A comprehensive <span class="search-highlight">study</span> of long-period (20 to 200 seconds) earth noise at the high-gain worldwide <span class="search-highlight">seismograph</span> stations
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Four data sets used in this study. (a) University of Utah Seismograph Station (UUSS) was used in training models to evaluate different uncertainty methods. (b) Unconstrained Utah Event Bulletin (UUEB) was used to test models trained with UUEB data. (c) Transportable Array (TA) was used to train U.S. scale classification models and has both explosion (EX) and earthquake (EQ) events. (d) National Earthquake Information Center (NEIC) has EQ and EX events and exotic events, many of which occur in Alaska (see Fig. S1 for full map including Alaska).

Four data sets used in this study. (a) University of Utah Seismograph Stati... Available to Purchase

Published: 27 January 2025
Figure 1. Four data sets used in this study. (a) University of Utah Seismograph Station (UUSS) was used in training models to evaluate different uncertainty methods. (b) Unconstrained Utah Event Bulletin (UUEB) was used to test models trained with UUEB data. (c) Transportable Array (TA) was used
Journal Article

A study of the relation between the periods of elastic waves and the distance traveled by them, based upon the seismographic records of the California earthquake, January 31, 1922 Available to Purchase

James B. Macelwane, S.J.
Published: 01 June 1923
Bulletin of the Seismological Society of America (1923) 13 (2): 13–69.
DOI: https://doi.org/10.1785/BSSA0130020013
... Redding @ °/Red Bluff O OALIFOI~NIA __ (Q Willows ° ol o Earthquake, January 31, 1922. The Bulletin of the Seismological Society of America VOL. XIII. JUNE, 1923 No. 2 A STUDY OF THE RELATION BETWEEN THE PERIODS OF ELASTIC WAVES AND THE DISTANCE TRAVELED BY THEM, BASED UPON THE SEISMOGRAPHIC RECORDS...
View PDF for article title, A <span class="search-highlight">study</span> of the relation between the periods of elastic waves and the distance traveled by them, based upon the <span class="search-highlight">seismographic</span> records of the California earthquake, January 31, 1922
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Distribution map of the seismographic stations used in this study. Stations are marked with red triangles. The color version of this figure is available only in the electronic edition.

Distribution map of the seismographic stations used in this study. Stations... Available to Purchase

Published: 31 August 2021
Figure 5. Distribution map of the seismographic stations used in this study. Stations are marked with red triangles. The color version of this figure is available only in the electronic edition.
Image
Distribution of the seismograph stations (triangles) used in this study. Dots are the earthquakes for the period 1 January 2017 to 10 December 2018 from the Natural Resources Canada (NRCan) earthquake catalog. The box marks the area shown in the inset with the location of the four events analyzed in this article depicted as stars. Moment tensor of the largest event (Table 1) is from U.S. Geological Survey (USGS). DC, Dawson Creek; FN, Fort Nelson; FSJ, Fort St. John; GP, Grand Prairie. The color version of this figure is available only in the electronic edition.

Distribution of the seismograph stations (triangles) used in this study. Do... Available to Purchase

Published: 19 June 2019
Figure 1. Distribution of the seismograph stations (triangles) used in this study. Dots are the earthquakes for the period 1 January 2017 to 10 December 2018 from the Natural Resources Canada (NRCan) earthquake catalog. The box marks the area shown in the inset with the location of the four
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Travel paths of Rayleigh wave R2, study region, and seismograph stations (black triangles) distribution. Purple triangles are sample stations with autocorrelation functions displayed in Figure 2.

Travel paths of Rayleigh wave R2, study region, and seismograph stations (b... Available to Purchase

Published: 30 January 2019
Figure 1. Travel paths of Rayleigh wave R2, study region, and seismograph stations (black triangles) distribution. Purple triangles are sample stations with autocorrelation functions displayed in Figure  2 .
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Periods of operation of the various seismograph stations in the study area between 1980 and 2016. See Figure 2a–e for the location of these stations. The 2005–2012 time period that was examined for possible induced activity is emphasized. The color version of this figure is available only in the electronic edition.

Periods of operation of the various seismograph stations in the study area ... Available to Purchase

Published: 31 October 2018
Figure 3. Periods of operation of the various seismograph stations in the study area between 1980 and 2016. See Figure  2a–e for the location of these stations. The 2005–2012 time period that was examined for possible induced activity is emphasized. The color version of this figure is available
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Location of seismographs used in this study. The light-blue squares are ocean bottom seismometers associated with the Marine Observations of Anisotropy Near Aotearoa (MOANA) array, and the purple squares are the New Zealand National Seismograph Network maintained by GeoNet. Stations CASS, CROE, KELY, and FREW were temporary stations deployed by Victoria University of Wellington. Bathymetric features including the Campbell Plateau, Challenger Plateau, Chatham Rise, the Hikurangi Trench, and the Puysegur Trench, along with the cities of Christchurch and Dunedin, and the Alpine fault, are labeled for reference. Seismicity since 2009 of mb &gt;4 and focal depth greater than 40 km highlights the seismic zones associated with each subducting slab. Red triangles mark locations of Miocene or younger volcanism. The thin black arrow shows current relative plate motion between the Pacific and Australian plates, and the two thick black arrows show absolute plate motion of each plate in a hotspot reference frame (Gripp and Gordon, 2002).

Location of seismographs used in this study. The light-blue squares are oce... Open Access

Published: 20 April 2018
Figure 1. Location of seismographs used in this study. The light-blue squares are ocean bottom seismometers associated with the Marine Observations of Anisotropy Near Aotearoa (MOANA) array, and the purple squares are the New Zealand National Seismograph Network maintained by GeoNet. Stations
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Map of the study reach. Node and broadband seismograph locations are indicated. The physical sampler transect is labeled in black. The high water line at peak discharge is contoured in blue. The red asterisk denotes the gravel injection point. Sonar-constrained bathymetry is shown for the deepest part of the channel. River flow direction is indicated by the black arrow.

Map of the study reach. Node and broadband seismograph locations are indica... Open Access

Published: 01 April 2017
Figure 1. Map of the study reach. Node and broadband seismograph locations are indicated. The physical sampler transect is labeled in black. The high water line at peak discharge is contoured in blue. The red asterisk denotes the gravel injection point. Sonar-constrained bathymetry is shown
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Wyoming earthquakes and seismograph stations evaluated in this study. Red circles are 21 September 2013 Wyoming deep earthquakes occurring at 13:16 UTC (Mw 4.8) and 15:15 UTC (M 3.0). The white circle enclosing a triangle is the 15‐station Pinedale Array. Green circles are shallow earthquakes; events labeled a–e occurred in 2009 and are located accurately using temporary USArray seismograph stations (white triangles); the event labeled f occurred 15 September 2013 at 19:22 UTC (M 1.8). The shaded area indicates the Wind River Mountains. The bold rectangle in the U.S. map inset indicates map boundaries.

Wyoming earthquakes and seismograph stations evaluated in this study. Red c... Available to Purchase

Published: 11 March 2015
Figure 2. Wyoming earthquakes and seismograph stations evaluated in this study. Red circles are 21 September 2013 Wyoming deep earthquakes occurring at 13:16 UTC ( M w  4.8) and 15:15 UTC (M 3.0). The white circle enclosing a triangle is the 15‐station Pinedale Array. Green circles are shallow