&lt;title&gt;3D ground penetrating radar applied to paleoseismology: examples from the Wellington Fault, New Zealand&lt;/title&gt;

Gross, Ralf; Holliger, Klaus; Green, Alan G.; Begg, John

doi:10.1117/12.383615

Cited by 13 publications

(11 citation statements)

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“…Grasmueck, 1996;Gross et al, 2000;Demanet et al, 2001;Bristow and Jol, 2003;Rashed et al, 2003;Reiss et al, 2003;Maurya et al, 2005) providing high-resolution images of the subsurface without damaging the surrounding environment. Common-offset profiles were recorded to image the radar facies of the buried normal fault and to delineate its locations, orientation and northward extension.…”

Section: Introductionmentioning

confidence: 94%

Ground penetrating radar investigations to study active faults in the Norcia Basin (central Italy)

Pauselli

Federico

Frigeri

et al. 2010

Journal of Applied Geophysics

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Section: Introductionmentioning

confidence: 94%

Ground penetrating radar investigations to study active faults in the Norcia Basin (central Italy)

Pauselli

Federico

Frigeri

et al. 2010

Journal of Applied Geophysics

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“…Gross et al 2000Gross et al , 2002Gross et al , 2003Gross et al , 2004Tronicke et al 2004;McClymont et al 2008aMcClymont et al , b, 2010, pseudo-3-D GPR (combined with a few CMP acquisitions) is an appropriate tool to investigate the subsurface and discriminate the various sedimentary and deformation features that it contains, down to a resolution of a few tens of centimetres. McCalpin 2009), it has not been applied so far on a scale larger than palaeoseismological trenches.…”

Section: O N C L U S I O N Smentioning

confidence: 99%

“…Gross et al 2000, 2002, 2004, Tronicke et al 2004McClymont et al 2008aMcClymont et al , b, 2010, it is the first time that this geophysical technique is used to explore and reveal the buried traces of coseismic offsets (exception is a previous attempt on a normal fault, McClymont et al 2009). To explore the buried record of past earthquakes, we develop a novel geophysical palaeoseismology, based on a specific use of pseudo-3-D ground penetrating radar (GPR) surveying.…”

mentioning

confidence: 99%

Finding the buried record of past earthquakes with GPR-based palaeoseismology: a case study on the Hope fault, New Zealand

Beauprêtre¹,

Garambois²,

Manighetti³

et al. 2012

Geophysical Journal International

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International audienceIn places where sedimentation and erosion compete at fast rates, part of the record of past earthquakes on faults may be buried, hence hidden, in the first few metres below the surface. We developed a novel form of palaeoseismology, of geophysical type, based on the use of a dense pseudo-3-D Ground Penetrating Radar (GPR) survey to investigate such possible buried earthquake traces, on a long, fast-slipping strike-slip fault (Hope fault, New Zealand), at a site (Terako) where marked alluvial conditions prevail. We first used LiDAR data to analyse the ground surface morphology of the 2 km2 site at the greatest resolution. Nineteen morphological markers were observed, mainly alluvial terrace risers and small stream channels that are all dextrally offset by the fault by amounts ranging between 3 and 200 m. The measurements document about 10 past earthquake slip events with a mean coseismic slip of 3.3 +/- 1 m, with the most recent earthquake event having a slip of 3 +/- 0.5 m. We then investigated a detailed area of the site (400 x 600 m2) with pseudo-3-D GPR. We measured 56, similar to 400 m long, 510 m spaced GPR profiles (250 MHz), parallel to the fault and evenly distributed on either side. The analysis revealed the existence of a palaeosurface buried at about 3 m depth, corresponding to the top of alluvial terraces of different ages. That buried surface is incised by a dense network of stream channels that are all dextrally offset by the fault. We measured 48 lateral offsets in the buried channel network, more than twice than at the surface. These offsets range between 6 and 108 m, as observed at the surface, yet provide a more continuous record of the fault slip. The similarity of the successive slip increments suggests a slip per event averaging 4.4 +/- 1 m, fairly similar to that estimated from surface data. From the total surface and buried 67 offset collection, we infer that a minimum of 30 large earthquakes have broken the Hope fault at the Terako site in the last about 67 kyr, with an average coseismic slip of 3.2 +/- 1 m, a minimum average recurrence time of about 200 yr, and a magnitude of at least Mw 7.07.4. Our study therefore confirms that part of the record of past earthquakes may indeed reside in the first few metres below the surface, where it may be explored with geophysical, GPR-based palaeoseismology. Developing such a new palaeoseismological tool should provide rich information that may complement surface observations and help to document the past earthquakes on faults

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“…Georadar methods have also been applied to crack detection, and have the advantages of being high resolution, convenient and non-destructive techniques (Sasahara et al, 1995;Gross et al, 2000). Ground penetrating radar (GPR) reflection surveys were employed to image subhorizontal fractures at or near normal incidence (Tsoflias et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Wave field features of shallow vertical discontinuity and their application in non-destructive detection

Liu

Xia

Luo

et al. 2007

Journal of Applied Geophysics

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<title>3D ground penetrating radar applied to paleoseismology: examples from the Wellington Fault, New Zealand</title>

Cited by 13 publications

References 0 publications

Ground penetrating radar investigations to study active faults in the Norcia Basin (central Italy)

Ground penetrating radar investigations to study active faults in the Norcia Basin (central Italy)

Finding the buried record of past earthquakes with GPR-based palaeoseismology: a case study on the Hope fault, New Zealand

Wave field features of shallow vertical discontinuity and their application in non-destructive detection

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