Socovos (1/2): ES728

Identification - compilation

Identification

Identification code :

ES728

Fault name :

Socovos (1/2)

Section name :

Socovos-Calasparra

Identification method :

Geological/Geomorphological field mapping

Geological and geographical set :

Betic Range (Albacete-Murcia)

Compilation

Name/s of the compiler/s :

García-Mayordomo, J.

Filiation/s :

IGME

E-mail :

julian.garcia@igme.es

Latest update :

2015-04-30

Location

Geometry and kinematics

Conventions

Variability/Error

Source

Brief comment

Average strike (º) :

295

Variability/Error:

± 5

Source:

Brief comment:

Baena et al. (1993), Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Valera et al. (2014)

Dip (º) :

Variability/Error:

± 5

Source:

Brief comment:

Subvertical. Based on Baena et al. (1993), Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Valera et al. (2014).

Rake (º) :

180

Variability/Error:

± 10

Source:

Brief comment:

Dextral since Tortonian ( Baena et al., 1993). Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Valera et al. (2014).

Sense of movement :

Variability/Error:

± 10

Source:

Brief comment:

Dextral since Tortonian (Baena et al., 1993). Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Valera et al. (2014).

Length (km) :

Variability/Error:

± 2

Source:

Brief comment:

Based on Baena et al (1993), Pérez-López et al (2010) and Sánchez-Gómez et al. (2010). These last authors consider Socovos fault divided into three distinct sectors: Molinicos (15 km), Abejuela (36 km) and Calasparra (28 km)

Min depth (km) :

Variability/Error:

± 5

Source:

Brief comment:

Outcrops at the surface. Baena et al. (1993), Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Valera et al. (2014)

Max depth (km) :

Variability/Error:

Source:

Brief comment:

Given value is seismogenic depth. Fault depth reaches lower crust. Table 4.21 in García-Mayordomo (2005).

Width (km) :

15.057

Variability/Error:

Source:

Brief comment:

Area (km²) :

798.037

Variability/Error:

Source:

Brief comment:

Quaternary activity Strength: A

Variability/Error

Source

Brief comment

Quaternary activity evidence :

Deformed Upper Pliocene and Lower Pleistocene geomorphic levels (travertines and alluvial fans). Consistent surface expression. Likely association to seismicity. Secondary faults affect Upper Pleistocene sediments.

Variability/Error:

Source:

Brief comment:

Baena et al. (1993), Pérez-López et al. (2010), Sánchez-Gómez et al. (2010), Pérez-Varela et al. (2014).

Age of the youngest deposits or landforms affected by the fault :

Upper Pleistocene

Variability/Error:

Lower Pleistocene to Upper Pleistocene

Source:

Brief comment:

Based on Baena et al. (1993) and Pérez-Varela et al. (2014). Radiometric dating is necessary.

Slip rate Accuracy: C

Variability/Error

Source

Brief comment

Vertical Slip Rate VSR (m/ky) :

Variability/Error:

Source:

Brief comment:

Pure dextral strike-slip assumed

Horizontal Slip Rate HSR (m/ky) :

0.1

Variability/Error:

0.04-0.15

Source:

Brief comment:

Based on Pérez-Valera et al. (2014) estimation at the Abejuela sector: 0.10-0.15 m/ka. Pérez et al. (2010) estimates 0.04 m/ka. Sánchez-Gómez et al. (2010) estimates 0.9-0.3 m/ka since Upper Miocene.

Net Slip Rate NSR (m/ky) :

0.1

Variability/Error:

0.04-0.15

Source:

Brief comment:

Pure dextral strike-slip assumed

Paleoearthquakes

Variability/Error

Source

Brief comment

Net slip per event at the Surface (m) :

Variability/Error:

Source:

Brief comment:

Unknown

Number of Seismic Events :

Variability/Error:

Source:

Brief comment:

Unknown

Evidence of aseismic creep? :

Variability/Error:

Source:

Brief comment:

Unknown

Seismic parameters

Variability/Error

Source

Brief comment

Maximum magnitude (Mw) :
Reliability: B

6.8

Variability/Error:

± 0.28

Source:

Brief comment:

Pérez-López et al (2010) estimated Mw 6.80 from SRL (40 km) using Wells and Coppersmith (1994) for strike-slip faults.

Recurrence interval (years) :
Reliability: C

45000

Variability/Error:

60000-30000

Source:

Brief comment:

Pérez et al. (2010) estimated 60000-30000 yrs based on Slemmons (1982).

Date of last major earthquake (years) :

Variability/Error:

Source:

Brief comment:

Unknown

Associated seismicity

Calasparra

Name of the event :

Calasparra

Date :

1941

Location :

-1.7361; 38.2348

Intensity and/or magnitude :

MSK: VI - Magnitude: 4.1

Source of seismic data :

IGN Catalogue

Basis for association :

Spatial correlation

Brief comment or references :

Additionally, close to the fault trace relatively deep earthquakes (h>25 km) well located show, which are very likely related to current activity of the fault as this is the deepest tectonic structure in the area (García-Mayordomo (2005) p.273).

Extended data and references

Explanation :

ES728-ES729.rar

References :

Baena et al. (1993) in: ITGE (1993a): Mapa Neotectónico, Sismotectónico y de Actividad de Fallas de la Región de Murcia (Escalas 1:200.000 y 1:100.000) and ITGE (1993b): Fichero de Fallas del Mapa Neotectónico, Sismotectónico y de Actividad de Fallas de la Región de Murcia (Escalas 1:200.000 y 1:100.000).

García-Mayordomo, J. (2005). Caracterización y análisis de la peligrosidad sísmica en el SE de España. Tesis Doctoral. UCM. Madrid. 379 pp.

Pérez-López, R., MA Rodríguez-Pascua, PG Silva, JL Giner-Robles and J García-Mayordomo. (2010). The Socovos Fault as seismic source for earthquake-size M>6-. Tectonic slip-rate from geomorphology and instrumental seismicity (SE Spain). In: Contribución de la Geología al análisis de la Peligrosidad Sísmica. Resúmenes de la 1ª Reunión Ibérica sobre Tectónica Activa y Paleosismología. Sigüenza. España, 27-29 de Octubre, pp 117-120.

Pérez-Varela, L.A., Sánchez-Gómez, M., Azor, A., and Pérez-Varela, F. (2014). Actividad Cuaternaria del sistema de estructuras asociado a la Falla de Socovos (Béticas Orientales). Resúmenes de la 2ª Reunión Ibérica sobre Fallas Activas y Paleosismología, Lorca, España, pp 35-38.

Sánchez-Gómez, M., L.A. Pérez-Valera, F. Pérez-Valera y A. Azor (2010) Segmentación de la falla de Socovos a partir de datos geológicos. Resúmenes de la 1ª Reunión Ibérica sobre Fallas Activas y Paleosismología, Sigüenza, España, pp. 137-140.

Slemons, J. (1982). Determination of desing earthquake magnitudes for mnicrozonation. En: Proceedings of the 3rd International Earthquake Microzonation Conference. Seatle, Washington (USA), pp. 119-130.

Stirling, M., Rhoades, D. and Berryman K. (2002): Comparison of Earthquake Scaling Relations Derived from Data of the Instrumental and Preinstrumental Era. Bulletin of the Seismological Society of America, 92 (2): 812–830.

Wells, DL and Coppersmith, KJ (1994). New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement. Bull. Sesimol. Soc. Am., 974-1002.

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