News

  • May 21, 2019: The paper on Temporal change of seismic Earth’s inner core phases: inner core differential rotation or temporal change of inner core surface? has been accepted at JGR.

  • Sep. 20, 2018: The paper on source characteristics of North Korea’s 2017 nuclear test has been published online at SRL.

  • Sep. 20, 2018: The paper on triggerred seismicity after North Korea’s 2017 nuclear test has been published online at SRL.

  • Previous news

Research Projects

Nuclear test

Determination the high-precision locations, yields, and source characteristics of North Korea’s nuclear tests, and the locations and source characteristics of the following seismic events based on seismological observations.

Repeating earthquakes

Build a global repeating earthquake dataset, and use it to study internal structure of the Earth and its change with time.

Lower mantle

Study seismic structure of lower mantle using travel times of S, ScS, P and ScP phases, and PKP precursors.

Inner core boundary

Study the temporal change of the Earth’s inner core surface by analyzing the changes of PKIKP and PKiKP travel times of repeating earthquakes.

Myanmar tomography

Study seismic velocity, anistropy and attenuation structures beneath Myanmar.

Selected Publications

# co-first author

We discuss the question whether inner core (IC) differential rotation or temporal change of the IC surface provides a consistent interpretation for temporal changes of the IC‐related phases and their coda. While temporal change of the IC surface is required and provides a consistent explanation to all the seismic observations, we present three lines of seismic evidence showing that IC differential rotation cannot provide a consistent or reasonable interpretation for the observed temporal change of seismic waves from repeating earthquakes in the South Sandwich Islands (SSI) and the Middle America subduction zone.
J. Geophys. Res. Solid Earth, 2019

  1. We present high-precision locations and detailed source information of four small seismic events following North Korea’s 2017 nuclear test;
  2. The first event is an on-site collapse 440 m northwest of the test site and best explained by a near vertical single force;
  3. The later events are an earthquake swarm located 8.4 km north of the test site with a focal depth of at least 2.4 km.
Geophys. Res. Lett., 2018

Recent Publications

# co-first author

More Publications

. Triggered seismicity after North Korea’s 3 September 2017 nuclear test. Seismol. Res. Lett., 2018.

PDF Project citation(4)

. Source characteristics of North Korea’s 3 September 2017 nuclear test. Seismol. Res. Lett., 2018.

PDF Project citation(3)

. Seismic structure and dynamic process of the Earth's inner core and its boundary. Chinese J. Geophys. (in Chinese), 2018.

PDF Project

Recent & Upcoming Talks

More Talks

Location and source characteristics of North Korea’s 2017 nuclear test and its triggered seismicity
May 30, 2019 14:30
Location and source characteristics of North Korea’s 2017 nuclear test and its triggered seismicity
May 30, 2019 10:00

Teaching

  • 2019 Nov: Introduction to seismology (Under Preparation)
  • 2019 Fall: Mathematics A (PPT)
  • 2019 Spring: Calculus II

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