Analysis of ionospheric VTEC disturbances before and after the Yutian Ms7.3 earthquake in the Xinjiang Uygur Autonomous Region

Wang, Xinzhi; Junhui, Jia; Yue, Dongjie; Ke, Fuyang

doi:10.3724/sp.j.1246.2014.03008

Cited by 11 publications

(9 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of these studies (e.g., Zakharenkova et al, 2006;Zakharenkova et al, 2008;Mubarak et al, 2009;Zhu et al, 2010;Zou and Zhao, 2010;Yao et al, 2012;Zhu et al, 2013;Xinzhi et al, 2014;Guo et al, 2015;Li et al, 2015;Pundhir et al, 2015;Alcay, 2016;Sharma et al, 2017;Akhoondzadeh et al, 2018;Sotomayor-Beltran, 2019) have confirmed the presence of ionospheric variations days before the occurrence of an earthquake. On the other hand, only a few studies (e.g., Zou, 2010;Xinzhi et al, 2014) have reported ionospheric anomalies a few days after an earthquake. Evidently, ionospheric disturbances may also arise due to some other natural phenomena or even man-made causes (Afraimovich et al, 2013); for instance, due to geomagnetic storms (Buonsanto, 1999;Danilov, 2013).…”

Section: Introductionmentioning

confidence: 90%

See 1 more Smart Citation

Ionospheric disturbances before and after the January 14, 2018 eartquake in Peru

Beltran¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

An earthquake of Mw 7.1 occurred on January 14, 2018 in the southern coast of Peru. In this study, public available Global Ionospheric Maps (GIMs) provided by the Center for Orbit Determination in Europe (CODE) were used to look for ionospheric disturbances pre-and postearthquake. Twelve days before the seismic event, a positive anomaly was detected at low latitudes in the northern hemisphere in differential vertical total electron content maps. Moreover, given the low-latitude nature of this incident, changes in the shape of the Equatorial Ionization Anomaly (EIA) were analyzed as well. A significant amplification of the northern crest in the EIA of 33.3 % was also observed 12 days before the earthquake. Because the geomagnetic and solar conditions for January 2, 2018 were very quiet and also knowing that natural ground radioactivity produced by the earthquake's preparation can increase the total electron density in the EIA, it is considered that this ionospheric disturbance is product of the earthquake's preparation. Additionally, the detection of a negative ionospheric anomaly 2 days after the incident is reported. An association to the earthquake of this negative disturbance is hinted at, due to the also the rather quiet geomagnetic and solar conditions after the seismic occurrence.

show abstract

Section: Introductionmentioning

confidence: 90%

“…In this case, they noticed these variations by looking into changes of the shape of the Equatorial Ionization Anomaly (EIA). Generating global ionospheric disturbance maps, Xinzhi et al (2014) observed a strong positive disturbance 12 days before the earthquake in Yutian, China. They also detected 2 days after the seismic event a negative…”

mentioning

confidence: 99%

Ionospheric disturbances before and after the January 14, 2018 eartquake in Peru

Beltran¹

2019

Acta Geodynamica Et Geomaterialia

View full text Add to dashboard Cite

show abstract

“…The search for earthquake precursors in the ionosphere is a very active field of research (e.g. Liu et al, 2004;Zakharenkova et al, 2006Zakharenkova et al, , 2008Zhao et al, 2008;Mubarak et al, 2009;Zhu et al, 2010;Zou and Zhao, 2010;Yao et al, 2012;Zhu et al, 2013;Wang et al, 2014;Xinzhi et al, 2014;Li et al, 2015;Guo et al, 2015;Pundhir et al, 2015;Alcay, 2016). There are studies that for example concentrate on a particular earthquake and through the employment of different techniques, they are able to identify ionospheric anomalies that appear a few days before and which are associated to an earthquake.…”

Section: Introductionmentioning

confidence: 99%

Ionospheric anomalies preceding the low-latitude earthquake that occurred on April 16, 2016 in Ecuador

Sotomayor-Beltran

2019

Journal of Atmospheric and Solar-Terrestrial Physics

View full text Add to dashboard Cite

“…Earthquakes can be the cause of major devastations depending on their intensity. Hence in the past years, the detection of seismo-ionospheric signatures has been taking increasingly attention [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17]. There are different methods to detect ionospheric anomalies before a strong earthquake.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of the aforementioned studies [1], [3], [4], [6], [9], [8], [13], [14], [16], that have detected ionospheric disturbance prior to a strong earthquakes, have detected these disturbances for earthquakes that had their origin in the Earth's crust (depth ≤ 70 km). Only quite a few studies [19], [12], [15] have looked for seismo-ionospheric signatures in earthquakes that had their origin deeper than the crust.…”

Section: Introductionmentioning

confidence: 99%

Ionospheric Anomalies before the 2015 Deep Earthquake Doublet, Mw 7.5 and Mw 7.6, in Peru

Sotomayor-Beltran¹

2019

IJACSA

View full text Add to dashboard Cite

Two major earthquakes separated by ∼5 minutes occurred in the same fault in Peru at depths of 606.2 and 620.6 km on November 24, 2015. By using Global Ionospheric Maps (GIMs) from the Center for Orbit Determination in Europe (CODE) and a broadly used statistical method, differential Vertical Total Electron Content (VTEC) maps were derived. Two positive ionospheric anomalies were clearly identified in the differential VTEC maps 2 and 1 day prior to the day of the earthquakes. These anomalies were located inside the earthquakes' preparation regions defined by the Dobrovolsky equation. On the other hand, due to the low-latitude nature of the seismic events, the Equatorial Ionization Anomaly (EIA) shape was also analyzed. A third positive disturbance was revealed between November 20 and 21, 2015. For the aforementioned anomaly and the one on November 22 (2 days before the earthquakes), an enhancement of the VTEC was observe through the considerable modification of the EIA shape into a well-defined double-crest with a trough. By looking into the Dst and Kp indices, the geomagnetic conditions starting on November 20 until the 24 were very quiet; thus, it is considered that the three detected anomalies are precursors to the earthquake doublet. Moreover, it is suggested that the mechanism at work that produced the positive disturbances is the air ionization through the release of radon from the Earth's crust.

show abstract

Analysis of ionospheric VTEC disturbances before and after the Yutian Ms7.3 earthquake in the Xinjiang Uygur Autonomous Region

Cited by 11 publications

References 4 publications

Ionospheric disturbances before and after the January 14, 2018 eartquake in Peru

Ionospheric disturbances before and after the January 14, 2018 eartquake in Peru

Ionospheric anomalies preceding the low-latitude earthquake that occurred on April 16, 2016 in Ecuador

Ionospheric Anomalies before the 2015 Deep Earthquake Doublet, Mw 7.5 and Mw 7.6, in Peru

Contact Info

Product

Resources

About