Sui Tung

University of Wisconsin–Madison | UW · Department of Geoscience

The M5 Mentone earthquake that occurred on March 26, 2020, was the largest event recorded over the last 2 decades in West Texas within the Delaware Basin, a U.S. major petroleum-producing area. Also, numerous hydrofracturing and wastewater disposal wells are spread across this region. Within a 30 km distance to mainshock, eight class-II injection w...

The 2017 Mw 6.5 Jiuzhaigou earthquake (JE) struck a rugged area of the Jiuzhaigou Valley in eastern Tibet that has experienced frequent seismic activity over the last few decades. We use finite‐element models (FEMs) and Sentinel‐1 Interferometric Synthetic Aperture Radar observations to characterize the earthquake source. The FEM domain accommodate...

Plain Language Summary A Mw7.2 earthquake took place near the city of Pinotepa Nacinoal in Oaxaca, Mexico, on 16 February 2018 and became the third most significant event striking southern Mexico since mid‐2017, after the Mw8.2 Tehuantepec and Mw7.1 Puebla‐Morelos earthquakes. A new algorithm of deformation modeling is designed to use a fault libra...

The source geometry of the 24 August 2016 Amatrice earthquake is studied with Sentinel 1-A/B and Advanced Land Observation Satellite (ALOS)-2 Interferometric Synthetic Aperture Radar (InSAR) coseismic observations. Without presetting the fault geometry and location, we allow these geodetic data to constrain a planar fault and a listric dislocation...

This study reveals how modeling configurations of forward and inverse analyses of coseismic deformation data influence the estimations of seismic and tsunami sources. We illuminate how the predictions of nearfield tsunami change when (1) a heterogeneous (HET) distribution of crustal material is introduced to the elastic dislocation model, and (2) t...

Two months after the 2016 Amatrice earthquake (AE), a strong (~M6) earthquake (Visso earthquake, VE) struck the town Visso, Italy, 20 km north of the AE epicenter. Between these two events, the aftershocks migrated gradually toward to the VE epicenter at a rate of ~0.4 km/d, indicating propagation of pore pressure front. We use finite element model...

The large M7.3 aftershock occurred 17 days after the 2015 M7.8 Gorkha earthquake. We investigate if this sequence is mechanically favored by the mainshock via time-dependent fluid migration and pore pressure recovery. This study uses finite element models of fully-coupled poroelastic coseismic and postseismic behavior to simulate the evolving stres...

The source geometry of the 24 August 2016, Amatrice earthquake is studied with Sentinel 1-A/B and ALOS-2 InSAR coseismic observations. Without presetting the fault geometry and location, we allow these geodetic data to constrain a planar fault and a listric dislocation through an innovative nonlinear approach. Finite element models (FEMs) are built...

We derive a coseismic slip model of the 2015 Mw7.8 Gorkha earthquake on the basis of GPS and line-of-sight displacements from ALOS-2 descending interferograms, using Green’s functions calculated with a 3-D finite element model (FEM). The FEM simulates a nonuniform distribution of elastic material properties and a precise geometric configuration of...

The eruption cycle of a volcano is controlled in part by the upward migration of magma. The characteristics of the magma flux produce a deformation signature at the Earth's surface. Inverse analyses use geodetic data to estimate strategic controlling parameters that describe the position and pressurization of a magma chamber at depth. The specific...

Radon and its progenies have been ranked second of being responsible for lung cancer in humans. Hong Kong has four major groups of uranium-rich plutonic and volcanic rocks and is suffering from radon emanated therefrom. However, there is a lack of radon potential maps in Hong Kong to resolve the spatial distribution of radonprone areas. A ten-point...

The devastating 2008 M=8 Sichuan Earthquake occurred in the Longmenshan (LMS) fault zone which comprises mainly the Wenchuan, Beichuan, and Pengguan Faults, between the Tibet and Yangtze Blocks of south-central China. Co-seismic fault dislocations ranging from 1m to 6m, and variations in gravity value up to 1.50 mGal were reported. We constructed f...

We completed a gravity anomaly traverse across the Longmenshan Fault Zone shortly before the 5.12.2008 M=8 Sichuan Earthquake. Gravity data were obtained at 2-3 km intervals along a 200 km traverse, extending from Longchuan City to Danba City in Sichuan. The gravity traverse happens to cut across the epicentral area of the earthquake. After the ear...

The 2008 Wenchuan Ms 8.0 earthquake resulted in big number of casualty and heavy strike to the local economy. Chengdu Plain has received highly priority on earthquake risk evaluation due to its dense population and short distance to the highly active Longmenshan fault zone. We conducted mapping of gravity anomaly of Chengdu Plain in order to locate...