Spatial-temporal variation of the land surface temperature field and present-day tectonic activity

This study attempts to acquire information on tectonic activity in western China from land surface temperature (LST) field data. On the basis of the established relationship between heat and strain, we analyzed the LST distribution in western China using the satellite data product MODIS/Terra. Our results show that: 1. There are departures from annual changes of LST in some areas, and that these changes are associated with the activity of some active tectonic zones. 2. When annual-change background values caused by climate factors are removed, the long-period component (LSTLOW) of temperature residual (ΔT) of the LST is able to serve as an indicator for tectonic activity. We have found that a major earthquake can produce different effects on the LST fields of surrounding areas. These effects are characterized by both rises and drops in temperature. For example, there was a noteworthy temperature decline associated with the Sumatran M9 earthquake of 2004 in the Bayan Har-Songpan block of central Tibetan Plateau. 3. On the other hand, the LST field of a single area may respond differently to major shocks occurring in different areas in the regions surrounding China. For instance, the Kunlun M 8.1 event made the LST on the Longmen Mountains fault zone increase, whereas the Zaisan Lake M 7.9 quake of 2003, and the Sumatran M 9 event of 2004, caused decreases in the same area’s LST. 4. The variations of land surface temperature (LST) over time are different in different tectonic areas. These phenomena may provide clues for the study of tectonic deformation processes. On the basis of these phenomena, we use a combination of temperature data obtained at varied depths, regional seismicity and strain results obtained with GPS measurements, to test the information related to tectonic activity derived from variations of the LST field, and discuss its implications to the creation of models of regional tectonic deformation.

[1]  A. A. Emanov,et al.  Geometry of the fault zone of the 2003 Ms = 7.5 Chuya earthquake and associated stress fields, Gorny Altai , 2008 .

[2]  Masashi Hayakawa,et al.  Atmospheric and ionospheric electromagnetic phenomena associated with earthquakes , 1999 .

[3]  Peixun Liu,et al.  Theoretical and experimental study on relationship between stress-strain and temperature variation , 2009 .

[4]  Peixun Liu,et al.  Temporal‐Spatial Variations of Associated Faulting Inferred from Satellite Infrared Information: A Case Study of the N‐S Seismotectonic Zone in China , 2006 .

[5]  Zhang Guo-min.  The effects of Sumatra earthquake with Magnitude 8.7 in China′s mainland , 2005 .

[6]  Cheng Shun.  NORMAL ANNUAL VARIATION FIELD OF LAND SURFACE BRIGHTNESS TEMPERATURE IN CHINA , 2004 .

[7]  L. Pei.  HEAT PENETRABILITY INDEX (HPI) METHOD FOR DISTILLING SUBSURFACE THERMAL INFORMATION FROM SATELLITE INFRARED IMAGES , 2004 .

[8]  Peixun Liu,et al.  A Study on the Normal Annual Variation Field of Land Surface Temperature in China , 2009 .

[9]  D. Yuan,et al.  Textual research of 1219 A.D. Guyuan earthquake in Ningxia Hui autonomous region, China and discussion on its causative structure , 2008 .

[10]  W. Tao,et al.  Crustal Elasticity Contrast Across The East Kunlun Fault in Northern Tibet Inferred from InSAR Measurements of the 2001 Mw 7.8 Kokoxili Earthquake , 2007 .

[11]  F. Freund.  Charge Generation and Propagation in Igneous Rocks , 2002 .

[12]  Chen Zhang-li,et al.  Moment tensor inversion and source rupture process of the September 27, 2003 M S=7.9 earthquake occurred in the border area of China, Russia and Mongolia , 2005 .

[13]  M. Jin,et al.  An experimental study on variation of thermal fields during the deformation of a compressive en echelon fault set , 2007 .

[14]  Peixun Liu,et al.  Insights into correlation between satellite infrared information and fault activities , 2006 .

[15]  De-Fu Liu,et al.  Thermal omens before earthquakes , 1999 .

[16]  A. Ridley,et al.  Comparative Study of Subauroral Polarization Streams with DMSP Observation and RAM Simulation , 2009 .

[17]  Peixun Liu,et al.  Wavelet Analysis of Thermal Infrared Radiation of Land Surface and Its Implication in the Study of Current Tectonic Activities , 2006 .

[18]  L. Pei.  AN EXPERIMENT ON THE INFRARED RADIATION OF SURFICIAL ROCKS DURING DEFORMATION , 2004 .

[19]  Lixin Wu,et al.  Features of infrared thermal image and radiation , 1998 .

[20]  R. Athay,et al.  Indices of Solar Activity , 1961 .

[21]  Ma Jin,et al.  Thermal Precursory Pattern of Fault Unstable Slip: An Experimental Study of En Echelon Faults , 2007 .

[22]  Dimitar Ouzounov,et al.  Mid-infrared emission prior to strong earthquakes analyzed by remote sensing data , 2004 .

[23]  A. A. Tronin,et al.  Satellite thermal survey—a new tool for the study of seismoactive regions , 1996 .

[24]  Cheng Shun.  Temporal-spatial variations of associated faulting inferred from satellite infrared information:A case study of the N-S seismo-tectonic zone in China , 2006 .

[25]  Ma Jin.  THERMAL FIELD INDICATORS FOR IDENTIFYING ACTIVE FAULT AND ITS INSTABILITY FROM LABORATORY EXPERIMENTS , 2008 .