Geophysicist | Geodesist | Seismologist | Open-source Developer

I am currently a post-doctoral researcher at the Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan. Although I am intrigued by all sorts of data analysis projects, my primary research interests are in Geophysics (mostly seismology), and Geodesy. I work on the tools that support data-intensive research and build software tools for researchers.

“First you guess, then you compute the consequences. Compare the consequences to experience. If it disagrees with experience, the guess is wrong. It doesn’t matter how beautiful your guess is, or how smart you are. Or what your name is, if it disagrees with experiment, it’s wrong. That’s all there is to it.”
-Richard Feynman

Computing and Technical Skills

Computing Technical
Web Development [backend (preferred), frontend] Computer Operating Systems: MacOS (Mojave), Linux distributions (Ubuntu, Fedora, Opensuse), Windows (7)
Open-source programming (scientific computing,
data visualization, and
achieving automation)
Database Development/Management: SQLite, PostgreSQL and Pandas DataFrame, AWS-S3
Python (primary),
Bash/csh,
R, C, Perl,
Fortran (and Gnuplot, MATLAB,
LATEX,
HTML/CSS, Markdown, Javascript (JQuery)
Designing: Proficient in Adobe Illustrator, Adobe Photoshop, iMovie,
HTML/CSS and JS
Generic Mapping Tools,
Basemap (Python),
Bokeh (Python) for plotting high resolution maps
Writing (offline): Microsoft Office Suite (Word, Excel, Powerpoint),
Mac Pages and Keynote (for manuscript), LATEX (for extensive documents),
Jupyter Notebook (for presentation of software packages)
Seismic Analysis Code (SAC) and Obspy (Python) for analyzing and visualzing seismic waveforms Writing (online): Wordpress, Medium (for blogging), Markdown, Jekyll, Sphinx documentation

Live Apps

SLRM home SLRM home GEV Satellite imagery

Current Research

  • Crustal fluid and afterslip driven co and transient post-seismic deformation associated with the 2016 Meinong earthquake (Mw 6.4)
  • Fully-automated Focal Mechanism Determination System and it’s Application on the Events Located in Northern Philippines
  • A Study Guide for Theoretical Global Seismology by Dahlen and Tromp (1998)
  • Spatial Analysis of Anomalously Large Co-seismic Deformation in the 2016 ML6.6 Meinong, Taiwan, Earthquake using EOF method on dense continuous GPS data of Taiwan
  • Hierarchical Agglomerative Clustering based on Dynamic Time Warping to explore the Re- gional Tectonics in Taiwan using GPS data
  • Automated receiver functions and shear-wave splitting measurements beneath seismic stations in the USArray and Germany by STADIUM-Py

Finished Research

  • Crustal structure and upper mantle anisotropy of the Afar triple junction [Accepted]
  • What Causes the Common-Mode Error in Array GPS Displacement Fields: Case Study for Taiwan in Relation to Atmospheric Mass Loading [Published]
  • Anisotropic Rayleigh Wave Phase Velocity Maps of Gujarat, India
  • Understanding of Taiwan typhoon rainfall erosivity using raindrop size distribution [Published]
  • A Meteor Shockwave Event Recorded at Seismic and Infrasound Stations in Northern Taiwan [Published]
  • Precipitation and cloud structure variations between two southern Indian states [Published]
  • Surface Wave Group Velocity Dispersion study of the Eastern Himalayan Foreland Basin (MASTER'S DISSERTATION)

Conferences attended

  • 2020 中華民國測地學會學術研討會 Geodetic Society of the Republic of China, Nantou, Taiwan
    Utpal Kumar, 博士生; Crustal Motion of Active Plate Convergence in Eastern Taiwan: Agglomerative Clustering based on Dynamic Time Warping
  • 2019 American Geophysical Union (AGU), San Francisco, CA, USA

    (1) Utpal Kumar, Benjamin Fong Chao (2019), GPS crustal motions along Taiwan’s east coast: EOF analysis, Abstract [G43B-0746]
    (2) Xu C., Kumar, U.,, Crustal fluid and afterslip drive transient postseismic deformation associated with the 2016 Meinong earthquake (Mw 6.4), Abstract [G43B-0743]

  • 2019 中華民國測地學會學術研討會 Geodetic Society of the Republic of China, Taichung, Taiwan
  • 2018 American Geophysical Union (AGU), Washington D.C, USA
    Utpal Kumar, Benjamin F. Chao, Emmy T. Y. Chang (2018) Common-Mode Error in GPS Displacement Field of Taiwan in Relation to Atmospheric Mass Loading [G13B-0522]
  • Asia Oceania Geosciences Society (AOGS), Honolulu, Hawaii, USA
    Utpal Kumar, Benjamin F. Chao, Emmy T. Y. Chang (2018) Spatio-Temporal EOF Analysis of Common-Mode Error on the Dense, Continuous GPS Data of Taiwan [SE28-D4-PM1-P-012 (SE28- A029)]
  • 2018 Taiwan Geosciences Assembly (TGA)
  • 2017 Taiwan Geosciences Assembly (TGA)

Publications

  1. Kumar, U., Chao, B. F., & Chang, E. T. Y. (2020). What causes the common‐mode error in array GPS displacement fields: Case study for Taiwan in relation to atmospheric mass loading. Earth and Space Science, 7, e2020EA001159. https://doi.org/10.1029/2020EA001159 READ
  2. Kumar, U., and Chao, B. F., (2019), Crustal Motion of Active Plate Convergence in Eastern Taiwan, 2007-2018: Agglomerative Clustering based on Dynamic Time Warping, Earth and Space Science Open Archive, 1, doi: 10.1002/essoar.10501536.1.READ
  3. Janapati, J., Seela B. K., Lin, P.-L., Wang, P. K., & Kumar, U., (2019), An assessment of tropical cyclones rainfall erosivity for Taiwan, Sci Rep 9, 15862 https://doi.org/10.1038/s41598-019-52028-5 READ
  4. Kumar, U., B. F. Chao, Y. Hsieh, and E. T. Y. Chang (2017), A meteor shockwave event recorded at seismic and infrasound stations in northern Taiwan, Geoscience Letters, 4(1). READ
  5. Seela, B. K., Reddy, K. K., Janapati, J., Rao, T. N., Lin, P.-L., Liu, C.-Y., & Kumar, U., (2016), Precipitation and cloud microstructure variations between two Southern Indian stations, Proc. of SPIE Vol. 9876, 98761O. http://dx.doi.org/10.1117/12.2218458 READ

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