Crustal deformation and strain analysis in Nepal from GPS time-series measurement and modeling by ARMA method

Ansari, Kutubuddin

doi:10.1007/s00531-018-1633-7

Cited by 16 publications

(2 citation statements)

References 35 publications

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“…(3) preliminary result from the previous studies indicates that the ARMA model is a successful tool for modeling of crustal deformation (e.g., Li et al, 2000;Ansari, 2018).…”

Section: Time-series Modelingmentioning

confidence: 99%

Geodetic Analysis inside the South Korean Peninsula and Impact of the 2011 Tohoku–Oki (TO) Earthquake

Ansari¹,

Park

2022

Acta Geologica Sinica (Eng)

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The most powerful Tohoku-Oki (TO) earthquake that occurred in Japan on 11 March 2011 affected Japan as well as South Korea. In the current study, we investigated contemporary geodetic deformation inside South Korea before and after the TO earthquake using Global Navigation Satellite System (GNSS) measurements from 01 January 2008 to 31 December 2017. Measured velocities of GNSS sites are modeled by Auto-regressive moving average (ARMA) method to analyze the long-term GNSS time-series variation and to investigate the secular tectonic crustal deformation. We found that the maximum co-seismic displacements during the TO earthquake reached up to 36.82 ± 0.21 mm in the east and 5.90 ± 0.08 mm in the north directions. The geometric model of the co-seismic thrust surface was characterized by a rectangular plane with a dip of 12.0° and strike 200°. The thrust is situated at 25 km hypocenter depth, with an area roughly ~470 km long and ~120 km wide. The seismicity pattern after the earthquake indicated that the compressional strain started to be replaced by the extensional strain during the post TO earthquake period from 2011 to 2014. Further, the strain became predominantly extensional during the period 2015 to 2017, revealing an effective rotational change that occurred inside the Korean Peninsula.

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“…(3) preliminary result from the previous studies indicates that the ARMA model is a successful tool for modeling of crustal deformation (e.g., Li et al, 2000;Ansari, 2018).…”

Section: Time-series Modelingmentioning

confidence: 99%

Geodetic Analysis inside the South Korean Peninsula and Impact of the 2011 Tohoku–Oki (TO) Earthquake

Ansari¹,

Park

2022

Acta Geologica Sinica (Eng)

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“…8,9]. Several studies have been carried out by using highprecision GNSS based on crustal deformation and Strain analysis [10][11][12][13]. The space weather plays a significant role in our day-to-day life, including in the advancement of the high-tech military systems based upon the highest strata of the Earth's atmosphere and ionosphere.…”

Section: Introductionmentioning

confidence: 99%

Total Electron Content Variation Over HALY (Al-Jouf), Saudi Arabia and Comparison with IRI-2012 and IRI-2016 Models

Sharma¹

2020

Preprint

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Ionospheric perdition studies are very few over Saudi Arabia due to less availability of data measurement. Although such kind of studies have been carried out all over the world, there still remains scope to ascertain prediction error in this country. Hence, in the current study, the ionospheric variation from April 2016 to February 2018 (almost 22 months) was studied over a GPS site HALY (29.140N; 36.10 0E), Al-Jouf, Saudi Arabia. Diurnal, monthly and seasonal ionospheric variations were investigated and compared with the existing global IRI (IRI 2012 and IRI 2016) models. Percentage deviation between observed and modeled TEC variation values indicated largescale deviation around 200% during the time of storm. Results showed that the IRI 2012 model had the lowest Root Mean Square Error (RMSE) value (2.7437) during the September Equinox while IRI-2016 showed the highest RMSE magnitudes (3.0166) during the December Solstice. In some seasons, the RMSE values were observed to be better for IRI 2012 while on other occasions, it emerged that IRI 2016 yielded more accurate results. Such variations indicate that even the most updated version of the IRI 2016 model is unable to provide perfect estimation and the requirement of further research and improvement in this field cannot be denied.

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Review of the Geometric Model Parameters of the Main Himalayan Thrust

Ansari¹

2021

Structural Geology and Tectonics Field Guidebook — Volume 1

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Crustal deformation and strain analysis in Nepal from GPS time-series measurement and modeling by ARMA method

Cited by 16 publications

References 35 publications

Geodetic Analysis inside the South Korean Peninsula and Impact of the 2011 Tohoku–Oki (TO) Earthquake

Geodetic Analysis inside the South Korean Peninsula and Impact of the 2011 Tohoku–Oki (TO) Earthquake

Total Electron Content Variation Over HALY (Al-Jouf), Saudi Arabia and Comparison with IRI-2012 and IRI-2016 Models

Review of the Geometric Model Parameters of the Main Himalayan Thrust

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