Vertical displacement measurements in Central California with a long-baseline two-fluid tiltmeter

1981 ◽  
Author(s):  
Howard C. Merchant
Keyword(s):  
Vertical Displacement ◽  
Central California ◽  
Long Baseline ◽  
Two Fluid ◽  
Displacement Measurements

scholarly journals Supplemental Material: How similar was the 1983 Mw 6.9 Borah Peak earthquake rupture to its surface-faulting predecessors along the northern Lost River fault zone (Idaho, USA)?

2022 ◽  
Author(s):  
Christopher B. DuRoss ◽  
et al.
Keyword(s):  
Fault Zone ◽  
Vertical Displacement ◽  
Probability Density Functions ◽  
Density Functions ◽  
Earthquake Rupture ◽  
Bulk Sediment ◽  
Large Format ◽  
Fault Bend ◽  
Bend Angles ◽  
Displacement Measurements

Text S1: Bayesian (OxCal) models for northern Lost River fault zone trench sites. Text S2: Bulk sediment analysis and charcoal identification; Text S3: Luminescence geochronology. Table S1: Description of stratigraphic units at the Sheep Creek trench. Table S2: Description of stratigraphic units at the Arentson Gulch trench. Figure S1: Photomosaics and large-format trench logs for the Sheep Creek trench. Figure S2: Photomosaics and large-format trench logs for the Arentson Gulch trench. Figure S3: Sheep Creek and Arentson Gulch vertical displacement measurements. Figure S4: Fault bend angles along the northern Lost River fault zone. Figure S5: Photographs of the Sheep Creek and Arentson Gulch trench sites. Figure S6: Probability density functions for Lost River fault zone ruptures.

scholarly journals Testing Polygon for Simulated Vertical Displacement Measurements based on Co-located InSAR Corner Reflector and GNSS Station

2021 ◽  
Vol 67 (4) ◽  
pp. 156-167
Author(s):  
Juraj STRUHÁR ◽  
Michal KAČMAŘÍK ◽  
Ivana HLAVÁČOVÁ ◽  
Milan LAZECKÝ ◽  
Petr RAPANT
Keyword(s):  
Vertical Displacement ◽  
Corner Reflector ◽  
Displacement Measurements

scholarly journals Aseismic strain episodes at Campi Flegrei Caldera, Italy

2021 ◽  
Vol 52 ◽  
pp. 119-129
Author(s):  
Bellina Di Lieto ◽  
Pierdomenico Romano ◽  
Roger Bilham ◽  
Roberto Scarpa
Keyword(s):  
Surface Deformation ◽  
Vertical Displacement ◽  
Campi Flegrei ◽  
Gas Emission ◽  
Campi Flegrei Caldera ◽  
Transient Strain ◽  
Long Baseline ◽  
Emission Activity ◽  
Microseismic Activity

Abstract. Since 2004 a research project has been developed to monitor subsurface deformation of Italian volcanoes using borehole strainmeters and long-baseline tiltmeters. Six Sacks-Evertson dilatometers were installed around Campi Flegrei caldera and Vesuvius during 2004–2005 (Scarpa et al., 2007), and in 2008 these instruments were supplemented by two arrays of 28–280 m long water-tube tiltmeters in underground tunnels. Relevant strainmeter and tiltmeter data have been collected and analysed from the instruments installed near Campi Flegrei caldera during the recent unrest episodes. In the period 2004–2005 strain, tilt and GPS data from Campi Flegrei indicate the onset of surface deformation that accompanied a low rate of vertical displacement that continued to 2006, corresponding to an increase of CO2 emission. This strain episode preceded caldera microseismic activity by a few months, as was observed also during a significant inflation episode in 1982. Other transient strain episodes occurred in October 2006, which were accompanied by a swarm of VT (Volcano-Tectonic) and LP (Long Period) events, in 2009, at the time of renewed gas emission activity at Solfatara, and again in March 2010, several minutes before a seismic swarm. The time scale of these transient strain events ranges from some hours to several days, putting tight constraints on the origin of ground uplifts at Campi Flegrei. Their location is compatible with a source inferred from long term deformation signals, located about 4 km beneath Pozzuoli. A proposed mechanism for these aseismic strain episodes is that they are associated with magma growth in reservoirs with occasional pressure relief associated with the leakage of gas.

scholarly journals Application of Classical Land Surveying Measurement Methods for Determining the Vertical Displacement of Railway Bridges

2017 ◽  
Vol 27 (4) ◽  
pp. 169-183 ◽  
Author(s):  
Pelagia Gawronek ◽  
Maria Makuch
Keyword(s):  
Static Load ◽  
Vertical Displacement ◽  
Measurement Methods ◽  
Railway Bridge ◽  
Railway Bridges ◽  
Land Surveying ◽  
Vertical Displacements ◽  
Load Tests ◽  
Steel Railway Bridge ◽  
Displacement Measurements

Abstract The classical measurements of stability of railway bridge, in the context of determining the vertical displacements of the object, consisted on precise leveling of girders and trigonometric leveling of controlled points (fixed into girders' surface). The construction elements, which were measured in two ways, in real terms belonged to the same vertical planes. Altitude measurements of construction were carried out during periodic structural stability tests and during static load tests of bridge by train. The specificity of displacement measurements, the type of measured object and the rail land surveying measurement conditions were determinants to define methodology of altitude measurement. The article presents compatibility of vertical displacements of steel railway bridge, which were developed in two measurement methods. In conclusion, the authors proposed the optimum concept of determining the vertical displacements of girders by using precise and trigonometric leveling (in terms of accuracy, safety and economy of measurement).

Vertical Displacement Measurements for Bridges Using Optical Fiber Sensors and CCD Cameras — A Preliminary Study

2009 ◽  
Vol 8 (3) ◽  
pp. 243-249 ◽  
Author(s):  
Tommy H. T. Chan ◽  
Demeke B. Ashebo ◽  
H.Y. Tam ◽  
Y. Yu ◽  
T.F. Chan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Vertical Displacement ◽  
Optical Fiber Sensors ◽  
Ccd Cameras ◽  
Fiber Sensors ◽  
Preliminary Study ◽  
Displacement Measurements

scholarly journals Supplemental Material: How similar was the 1983 Mw 6.9 Borah Peak earthquake rupture to its surface-faulting predecessors along the northern Lost River fault zone (Idaho, USA)?

2022 ◽  
Author(s):  
Christopher B. DuRoss ◽  
et al.
Keyword(s):  
Fault Zone ◽  
Vertical Displacement ◽  
Probability Density Functions ◽  
Density Functions ◽  
Earthquake Rupture ◽  
Bulk Sediment ◽  
Large Format ◽  
Fault Bend ◽  
Bend Angles ◽  
Displacement Measurements

Text S1: Bayesian (OxCal) models for northern Lost River fault zone trench sites. Text S2: Bulk sediment analysis and charcoal identification; Text S3: Luminescence geochronology. Table S1: Description of stratigraphic units at the Sheep Creek trench. Table S2: Description of stratigraphic units at the Arentson Gulch trench. Figure S1: Photomosaics and large-format trench logs for the Sheep Creek trench. Figure S2: Photomosaics and large-format trench logs for the Arentson Gulch trench. Figure S3: Sheep Creek and Arentson Gulch vertical displacement measurements. Figure S4: Fault bend angles along the northern Lost River fault zone. Figure S5: Photographs of the Sheep Creek and Arentson Gulch trench sites. Figure S6: Probability density functions for Lost River fault zone ruptures.

RELAXATION AND COLLECTIVE MOTION IN SUPERCONDUCTORS. A TWO-FLUID DESCRIPTION

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-488-C6-489 ◽  
Author(s):  
C. J. Pethick ◽  
H. Smith
Keyword(s):  
Collective Motion ◽  
Two Fluid
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