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HYPOINVERSE

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Journal Article
Published: 01 April 1984
Seismological Research Letters (1984) 55 (2): 3-6.
... of the more widely used programs (HYPOELLIPSE, FASTHYPO, HYPO71, and HYPOINVERSE). In all the programs considered, an individual confidence interval is given for the depth error. For the epicentral error, HYPO71 and HYPOINVERSE provide only individual confidence estimates, while the other programs provide...
Journal Article
Published: 01 April 1990
Bulletin of the Seismological Society of America (1990) 80 (2): 395-410.
..., using various layered and laterally varying velocity models. Locations with QUAKE3D are nearly identical to HYPOINVERSE locations when the same flat-layered velocity model is used. For the examples presented, the computation time per event is approximately 4 times slower than HYPOINVERSE...
Journal Article
Published: 01 June 1986
Bulletin of the Seismological Society of America (1986) 76 (3): 771-783.
...Barry R. Lienert; E. Berg; L. Neil Frazer Abstract We present an earthquake location method, HYPOCENTER, which combines features of the two well-known algorithms HYPO71 and HYPOINVERSE, with a new technique which we term adaptive damping. Each column of the linearized condition matrix T , which...
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(a) Comparison of Bancroft algorithm and <b>HYPOINVERSE</b> location residuals usi...
Published: 27 January 2015
Figure 2. (a) Comparison of Bancroft algorithm and HYPOINVERSE location residuals using synthetic data. Dark gray indicates Bancroft, and the black lines indicate HYPOINVERSE. Histograms are shown for latitude, longitude, depth, and origin time residuals calculated from the true and estimated
Image
Histogram of the root mean square (rms) difference between the <b>HYPOINVERSE</b> ...
Published: 27 January 2015
Figure 3. Histogram of the root mean square (rms) difference between the HYPOINVERSE and Bancroft solutions using Charlevoix seismic‐zone real data. An rms D >0 represents a solution in which Bancroft produced a better rms than HYPOINVERSE, and rms D <0 represents a solution in which
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A map view showing the 30 well‐located earthquakes with initial <b>HYPOINVERSE</b>...
Published: 15 October 2014
Figure 7. A map view showing the 30 well‐located earthquakes with initial HYPOINVERSE locations as red circles and HypoDD locations as green circles. The HypoDD locations of the 10 large earthquakes are shown as blue circles, with error ellipses from the original HYPOINVERSE location. The thickly
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Map showing the 268 earthquakes relocated by the <b>HYPOINVERSE</b>&#x2F;VELEST steps (...
Published: 01 February 2013
Figure 3. Map showing the 268 earthquakes relocated by the HYPOINVERSE/VELEST steps (white dots), and the 427 events that were relocated up through the hypoDD double‐difference algorithm (black dots). About 85% of the events locate on the Pa–NA plate boundary within the GoC . Note
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Location errors calculated with the <b>Hypoinverse</b> code ( Klein, 2002 ). Trian...
Published: 01 December 2011
Figure 2. Location errors calculated with the Hypoinverse code ( Klein, 2002 ). Triangles (left frame) are the rms of the time residuals versus horizontal errors ( ERH ) in kilometers. The right frame is the rms versus the vertical errors ( ERZ ) of the initial locations.
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(a). Map view of <b>HYPOINVERSE</b> location of 19 events; (b) cross-section A–B o...
Published: 01 June 2010
Figure 4. (a). Map view of HYPOINVERSE location of 19 events; (b) cross-section A–B of HYPOINVERSE locations; (c) cross-section C–D of HYPOINVERSE locations; (d) map view of double-difference locations using only phase data, event 13 was an outlier and not located; (e) across-strike cross-section
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Distribution of hypocenters located with the <b>Hypoinverse</b> code. The faults t...
Published: 01 June 2010
Figure 4. Distribution of hypocenters located with the Hypoinverse code. The faults that ruptured in 1887 (P, Pitáycachi; T, Teras, and O, Otates) are highlighted by bold traces. The solid circle is station NE81 of the NARS–Baja array; solid triangles show the location of RESNES stations; squares
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Focal depths obtained with <b>Hypoinverse</b> and velocity model V1 (top row) and ...
Published: 01 June 2010
Figure 5. Focal depths obtained with Hypoinverse and velocity model V1 (top row) and with the SSST method and velocity model V4 (middle and bottom rows). In the left column, the foci are projected into an east–west section and in the central column into a north–south section. The right column
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Map of actual and calculated locations using <b>HypoInverse</b> 2000 for large sho...
Published: 01 October 2003
Figure 5. Map of actual and calculated locations using HypoInverse 2000 for large shots used as part of the wide-angle refraction study ( Zhao et al., 2001 ). Large black circles are large explosions used to calibrate earthquake location program. Triangles are INDEPTH III stations. Small circles
Journal Article
Published: 11 July 2018
Seismological Research Letters (2018) 89 (5): 1660-1670.
... and recorded continuously for approximately 30 days. Using a new frequency‐domain array‐based detector and a traditional short‐term average/long‐term average (STA/LTA) detector, we identified 242 earthquakes. We were able to precisely locate 203 of these earthquakes using HYPOINVERSE. During the same time...
FIGURES | View All (5)
Journal Article
Published: 15 November 2016
Bulletin of the Seismological Society of America (2016) 106 (6): 2695-2705.
... D 1.4–3.0). Locations were obtained using HYPOINVERSE 2000, and epicenters were accurate in most cases to within 3.0 km or less. Fault‐plane solutions were obtained from the mainshock and from seven of the other events of the sequence. Analysis of the data indicates that release of the stress...
Journal Article
Published: 27 January 2015
Bulletin of the Seismological Society of America (2015) 105 (2A): 676-685.
...Figure 2. (a) Comparison of Bancroft algorithm and HYPOINVERSE location residuals using synthetic data. Dark gray indicates Bancroft, and the black lines indicate HYPOINVERSE. Histograms are shown for latitude, longitude, depth, and origin time residuals calculated from the true and estimated...
FIGURES | View All (5)
Journal Article
Published: 26 November 2013
Bulletin of the Seismological Society of America (2013) 104 (1): 551-559.
... seismicity. Such data may lead to improvements in delineating seismogenic features, understanding the earthquake source properties, and evaluating the earthquake hazards associated with infrequent occurrence of such earthquakes in stable regions. Online Material: Figures showing locations from HYPOINVERSE...
FIGURES | View All (6)
Journal Article
Published: 01 June 2010
Bulletin of the Seismological Society of America (2010) 100 (3): 1153-1164.
...Figure 4. Distribution of hypocenters located with the Hypoinverse code. The faults that ruptured in 1887 (P, Pitáycachi; T, Teras, and O, Otates) are highlighted by bold traces. The solid circle is station NE81 of the NARS–Baja array; solid triangles show the location of RESNES stations; squares...
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Journal Article
Published: 01 December 1990
Bulletin of the Seismological Society of America (1990) 80 (6A): 1605-1628.
... with hypocenter parameters are calculated assuming the data errors may be correctly described by a Gaussian distribution. We examine the influence of S -phase arrival time data on such algorithms by using the program HYPOINVERSE with synthetic datasets. Least-squares hypocenter determination algorithms have...
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Histograms of the  GDOP  classified by rms value. For hypocenters with GDOP...
Published: 27 January 2015
Figure 5. Histograms of the GDOP classified by rms value. For hypocenters with GDOP<∼4, Bancroft had fewer cases with smaller rms than did HYPOINVERSE. For hypocenters with GDOP>∼4, Bancroft had more cases with smaller rms than did HYPOINVERSE.
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North–south cross section perpendicular to strike of preferred fault plane....
Published: 15 October 2014
Figure 6. North–south cross section perpendicular to strike of preferred fault plane. Red circles represent HYPOINVERSE locations with error bars, and green circles are the same earthquakes relocated with HypoDD.