Fault Slip, Seismicity, and Deformation in Mexicali Valley, Baja California, Mexico, after the M 7.1 1999 Hector Mine Earthquake

Glowacka, Ewa; Nava, F. Alejandro; Cossio, G. Diaz de; Wong, Victor; Farfan, F.

doi:10.1785/0120000911

Cited by 34 publications

(17 citation statements)

References 27 publications

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“…3b is characterized by abrupt R increase, extension (subsidence) increase, and azimuth decrease. This is followed by the slow deformation with the same orientation, similar to the regular slip event, but with smaller magnitude, expected since the slip predictable character of deformation suggested by Glowacka et al (2002). The deformation shown on Fig.…”

Section: Discussionsupporting

confidence: 63%

“…This includes, for example, Hector Mine Earthquake (of magnitude 7.2 and at a distance 260 km away 15 on 1999), as described by Glowacka et al (2002), and, probably, by the Canal de las Ballenas earthquake (of magnitude 6.9 and a distance ∼ 400 km away 2009), as described by Glowacka et al (2015). These studies suggest that distant earthquakes can influence fault slip related to the subsidence.…”

Section: Geotechnical Instruments Monitoringmentioning

confidence: 99%

“…Since then, the REDECVAM (Red de Deformaciones de la Corteza en el Valle de Mexicali) network has included four creepmeters (wide range extensometer) and nine tiltmeters installed over different periods in different places; all instruments have sampling intervals in the 1 to 20 min range (Nava and Glowacka, 1999;Glowacka et al, 2002Glowacka et al, , 2010bSarychikhina et al, 2015). Creepmeters (Geokon model 4420) were installed mainly on vertical planes perpendicular to faults, in order to record vertical displacement.…”

Section: Geotechnical Instruments Monitoringmentioning

confidence: 99%

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Subsidence monitoring with geotechnical instruments in the Mexicali Valley, Baja California, Mexico

et al. 2015

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Abstract. The Mexicali Valley (northwestern Mexico), situated in the southern part of the San Andreas fault system, is an area with high tectonic deformation, recent volcanism, and active seismicity. Since 1973, fluid extraction, from the 1500–3000 m depth range, at the Cerro Prieto Geothermal Field (CPGF), has influenced deformation in the Mexicali Valley area, accelerating the subsidence and causing slip along the traces of tectonic faults that limit the subsidence area. Detailed field mapping done since 1989 (González et al., 1998; Glowacka et al., 2005; Suárez-Vidal et al., 2008) in the vicinity of the CPGF shows that many subsidence induced fractures, fissures, collapse features, small grabens, and fresh scarps are related to the known tectonic faults. Subsidence and fault rupture are causing damage to infrastructure, such as roads, railroad tracks, irrigation channels, and agricultural fields. Since 1996, geotechnical instruments installed by CICESE (Centro de Investigación Ciéntifica y de Educación Superior de Ensenada, B.C.) have operated in the Mexicali Valley, for continuous recording of deformation phenomena. Instruments are installed over or very close to the affected faults. To date, the network includes four crackmeters and eight tiltmeters; all instruments have sampling intervals in the 1 to 20 min range. Instrumental records typically show continuous creep, episodic slip events related mainly to the subsidence process, and coseismic slip discontinuities (Glowacka et al., 1999, 2005, 2010; Sarychikhina et al., 2015). The area has also been monitored by levelling surveys every few years and, since the 1990's by studies based on DInSAR data (Carnec and Fabriol, 1999; Hansen, 2001; Sarychikhina et al., 2011). In this work we use data from levelling, DInSAR, and geotechnical instruments records to compare the subsidence caused by anthropogenic activity and/or seismicity with slip recorded by geotechnical instruments, in an attempt to obtain more information about the process of fault slip associated with subsidence.

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Section: Discussionsupporting

confidence: 63%

Section: Geotechnical Instruments Monitoringmentioning

confidence: 99%

Section: Geotechnical Instruments Monitoringmentioning

confidence: 99%

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Subsidence monitoring with geotechnical instruments in the Mexicali Valley, Baja California, Mexico

et al. 2015

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“…However, seismicity in the Mexicali valley ranges in depth between *1 km and 15 km, with most earthquakes occurring between 4 and 6 km , near the southern part of Imperial fault (Glowacka et al 2002) seismicity occurs below the 2 km depth. Near the southern part of the Imperial fault unconsolidated sediments reach depths of *2.5 km west of the fault (Fig.…”

Section: Discussionmentioning

confidence: 99%

Anthropogenic subsidence in the Mexicali Valley, Baja California, Mexico, and slip on the Saltillo fault

et al. 2009

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“…Comparisons of observed and predicted events using Omori's law and aftershock productivity rates have been used to argue for local aftershock generation [ Brodsky , ], while aseismic slip and pore fluid diffusion mechanisms are often based on migration velocities observed in spatiotemporal event distributions. Few studies have been able to place constraints on the fluid sources involved [e.g., Parotidis et al ., ] or causative creep events [e.g., Glowacka et al ., ]. However, Parotidis et al .…”

Section: Introductionmentioning

confidence: 99%

Background and delayed-triggered swarms in the central Southern Alps, South Island, New Zealand

Boese

Jacobs

Smith

et al. 2014

Geochem. Geophys. Geosyst.

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Low-magnitude earthquake swarms (M L 2.8), consisting of up to 47 events of similar waveforms, have been observed repeatedly in the central Southern Alps, a rapidly uplifting orogen bounded by the transpressive Alpine Fault in the South Island of New Zealand. We compare nine background swarms recorded between November 2008 and April 2010 with five delayed-triggered swarms that occurred after the M W 7.8 Dusky Sound and the M W 7.1 Darfield (Canterbury) earthquakes. The two types of swarms are similar in terms of the magnitudes, depths, focal mechanisms, and interevent times of the constituent microearthquakes, and appear to both involve the rupture of steeply dipping faults in highly fractured crust in a 10 km 3 12 km area in the center of the SAMBA network. The delayed-triggered swarms occurred at similar epicentral distances (c. 4.53 the rupture length of the mainshocks) to the Dusky Sound and Darfield earthquakes, commenced shortly after the passage of the surface waves, continued for 5 and 2 days, respectively, and were followed in each case by a 2 day long quiescent period, which may suggest clockadvanced of faults in their failure-cycle. Triggering thresholds of 0.01 MPa proposed elsewhere are similar to the dynamic stress changes computed for the Southern Alps (0.09 MPa). However, as 98% of the locatable triggered events occurred several hours after the surface waves had passed, the dynamic stress changes associated with the surface waves themselves are unlikely to have triggered the earthquakes directly. Instead, we suggest that the locations and delays of the triggered swarms are more consistent with triggering by pore pressure diffusion.

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Fault Slip, Seismicity, and Deformation in Mexicali Valley, Baja California, Mexico, after the M 7.1 1999 Hector Mine Earthquake

Cited by 34 publications

References 27 publications

Subsidence monitoring with geotechnical instruments in the Mexicali Valley, Baja California, Mexico

Subsidence monitoring with geotechnical instruments in the Mexicali Valley, Baja California, Mexico

Anthropogenic subsidence in the Mexicali Valley, Baja California, Mexico, and slip on the Saltillo fault

Background and delayed-triggered swarms in the central Southern Alps, South Island, New Zealand

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