Research on the changes of the tidal force and the air temperature in the atmosphere of Lushan (China) Ms7.0 earthquake

Ma, Wei; Kong, Xiangzeng; Chen, Kang; Zhong, X. Y.; Wu, Haiyan; Zhan, Xiaoshan; Joshi, M N

doi:10.2298/tsci150403148m

Cited by 13 publications

(10 citation statements)

References 5 publications

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“…Guo WY et al (2006) concluded that a CTIB anomaly appeared in the northwestern margin of the Tarim basin before the Bachu M S 6.8 EQ in 2003. Ma WJ et al (2015), also, reported a CTIB anomaly before the Lushan M S 7.0 EQ in 2010, in which the epicenter of the Lushan EQ was located along the western edge of the Sichuan basin. They found that the spatiotemporal evolution of the air temperature anomaly increased in the Sichuan basin, owing to the air temperature anomaly of a periodic tidal force.…”

Section: Resultsmentioning

confidence: 97%

Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the North and East of the Qinghai–Tibet Plateau

Zhang¹,

Zhang

2020

Earth and Planetary Physics

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Key Points:Co-seismic brightness anomalies surrounding the North and East of the Qinghai -Tibet Plateau are reviewed q Co-seismic greenhouse gas leaking is suggested to cause brightness temperature anomalies q A new model of thermal emission based on six earthquakes occurred in four petroliferous basins is presented q Citation: Zhang, X., and Zhang, L. F. (2020). Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the North and East of the Qinghai-Tibet Plateau. Earth Planet. Phys., 4(3), 296-307. http://doi. Abstract:Co-seismic gas leakage usually occurs on the edge of seismic faults in petroliferous basins, and it may have an impact on the local environment, such as the greenhouse effect, which can cause thermal infrared brightness anomalies. Using wavelet transform and power spectrum estimation methods, we processed brightness temperature data from the Chinese geostationary meteorological satellite FY-C/E. We report similarities between the co-seismic thermal infrared brightness (CTIB) anomalies before, during and after earthquakes that occurred at the edges of the Sichuan, Tarim, Qaidam, and Junggar basins surrounding the North and East of the Qinghai-Tibet Plateau in western China. Additionally, in each petroliferous basin, the area of a single CTIB anomaly accounted for 50% to 100% of the basin area, and the spatial distribution similarities in the CTIB anomalies existed before, during and after these earthquakes. To better interpret the similarities, we developed a basin warming effect model based on geological structures and topography. The model suggests that in a petroliferous basin with a subsurface gas reservoir, gas leakage could strengthen with the increasing stress before, during, and even after an earthquake. The accumulation of these gases, such as the greenhouse gases CH 4 and CO 2 , results in the CTIB anomalies. In addition, we conclude that the CTIB anomalies are strengthened by the high mountains (altitude ~5000 m) around the basins and the basins' independent climatic conditions. This work provides a new perspective from which to understand the CTIB anomalies in petroliferous basins surrounding the North and East of the Qinghai-Tibet Plateau.

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Section: Resultsmentioning

confidence: 97%

Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the North and East of the Qinghai–Tibet Plateau

Zhang¹,

Zhang

2020

Earth and Planetary Physics

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“…The tidal force induced by celestial bodies represents one of the most important external causes of ground stress, which may accumulate to the extent of triggering an earthquake [35]- [37]. It is periodically and continuously changing and the phase of its seismic induction varies with seismic structure [22], [38], [39]. At present, the tide-generating force of celestial bodies is the only earth deformation phenomenon that can be calculated in advance, which has a certain indicative function in the time domain, but it is difficult to judge whether the stress intensity of seismogenic tectonic movement will reach the critical point.…”

Section: The Tidal Force Fluctuant Analysis Methodsmentioning

confidence: 99%

“…This method is an analytical method subtracting the normal background image from a series of temperature images according to the tidal force fluctuant cycles based on OLR data. This procedure is done in order to reduce disturbances from other factors and extract the abnormal temperature increase caused by activities in the Earth's crust [22], [23]. This algorithm does not require long-term background data and its thermal anomaly results are consistent with the law of thermal radiation change in the process of rock mechanics loading fracture, that is, increasing→strengthen→peak→fading→re-strengthen→calmness [22], [24]- [26].…”

Section: Introductionmentioning

confidence: 99%

The Outgoing Longwave Radiation Analysis of Medium and Strong Earthquakes

et al. 2021

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Two approaches are applied to outgoing longwave radiation (OLR) data to obtain abnormal changes before and after six earthquakes: the background field analysis method, which focuses on statistically processing the increment of a radiation value to the multi-year average of the data; and the tidal force fluctuant analysis method, which abandons background data for many years by using the influence of tidal fluctuations to obtain incremental changes in radiation. The results demonstrate that the increase in OLR data identified via the background field analysis method was uncertain. In the time distribution, the occurrence time of anomalies is isolated and not continuous. In the spatial distribution, many OLR enhancement areas occurred multiple times in the non-seismic and remote seismic-related fault structure areas. In contrast, through the tidal force fluctuant analysis method a clear and consecutive OLR anomaly emerged in the seismogenic cycle of the tidal force. It corresponded with the tidal force through a unique evolution: increased-earthquake-shrink around the epicentre, consistent with the change in the law of thermal radiation during the rock-breaking process under stress, and clearly related to the earthquake's seismic tectonic stress change. It is proven that the tidal force of a celestial body may trigger an earthquake when the tectonic stress reaches its critical breaking point, and when the triggering action is a continuous rather than brief one-shot process. The in-situ stress state is key. The OLR anomaly was the physical performance of underlying surface radiation from the change in seismic tectonic stress.

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“…It appears reasonable that the tectonic stress due to tidal force can contribute to reach the rock critical failure point (Heaton, 1975;McNutt and Beavan, 1981;Kilston and Knopoff, 1983) and then could be correlated with the earthquake nucleation (Weiyu et al, 2018). In this framework, it has been claimed that tidal force could generate some seismo-associated thermal anomalies Ma et al, 2015;Yan Z. et al, 2017;Weiyu et al, 2018;Zhang et al, 2018). However, even this generation mechanism does not overcome the limits due to the inefficient propagation process up to the surface.…”

Section: How Earthquakes Could Generate Thermal Anomaliesmentioning

confidence: 99%

A Critical Review of Ground Based Observations of Earthquake Precursors

2021

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We aim at giving a short review of the seismo-associated phenomena detected on ground that in recent years have been investigated as possible earthquake precursors. The paper comes together with a companion article–published on this same volume by Picozza et al., 2021–devoted to summarize the space-based observation of earthquake–precursors by satellites missions. In the present work, we give an overview of the observations carried out on ground in order to identify earthquake precursors by distinguishing them from the large background constituted by both natural non-seismic and artificial sources. We start discussing the measurements of mechanical parameters and variations of geochemical fluids detected before earthquakes; then we review thermal and atmospheric oscillations; finally, observations of electromagnetic and ionospheric parameters possibly related to the occurrence of impeding earthquakes are discussed. In order to introduce a so large field of research, we focus only on some main case studies and statistical analyses together with the main hypotheses and models proposed in literature in order to explain the observed phenomenology.

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Research on the changes of the tidal force and the air temperature in the atmosphere of Lushan (China) Ms7.0 earthquake

Cited by 13 publications

References 5 publications

Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the North and East of the Qinghai–Tibet Plateau

Modeling co-seismic thermal infrared brightness anomalies in petroliferous basins surrounding the North and East of the Qinghai–Tibet Plateau

The Outgoing Longwave Radiation Analysis of Medium and Strong Earthquakes

A Critical Review of Ground Based Observations of Earthquake Precursors

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