geodesymiami / 2021-kirishima

Notebooks for Yunjun et al. (2021) on Kirishima volcanic complex in Japan

Jupyter Notebooks for:

Yunjun, Z., Amelung, F., & Aoki, Y. (2021), Imaging the hydrothermal system of Kirishima volcanic complex with L-band InSAR time series, Geophysical Research Letters, 48(11), e2021GL092879. doi:10.1029/2021GL092879

Data

• InSAR displacement products:
  • Time-series, velocities and selected interferograms for Kirishima, Japan from ALOS-1/2: Zenodo.
  • Stacks of interferograms for southern Kyushu, Japan from ALOS-1: Zenodo.
  • Stacks of interferograms for southern Kyushu, Japan from ALOS-2: Zenodo.
  • Configurations for InSAR data processing with ISCE-2 and MintPy: Link
• Geodetic modeling:
  • Model results from GBIS: Zenodo.
  • Configurations for GBIS: Link

Figures (nbviewer)

NOTE: This notebook is based on the released version of MintPy-1.3 and NOT maintained for future development.

• Fig. 1 - Geophysical observations at Kirishima during 2008-2019.

  • Fig. 1a-c - Geological setting.
  • Fig. 2d-f - Quasi-vertical displacement maps from InSAR.
  • Fig. 2g-i - Time-series of InSAR, GPS and EQ number.

• Fig. 2 - Geodetic modeling results at Shinmoe-dake and Iwo-yama.

• Fig. 3 - Conceptual model of the Kirishima plumbing system.

  • Fig. 3a-b - Probability density distribution of source depths.
  • Fig. 3c - Conceptual model cartoon.

Notes for converting height from ellipsoid to geoid

The height of the DEHM (Digital Ellipsoidal Height Model) from GSI is relative to the ellipsoid and used in the InSAR processing. However, for geodetic modeling, the height should be relative to mean sea level from the Earth Gravity Model (i.e. EGM96). This is implemented as the save_gbis.py --ellipsoid2geoid in MintPy using geoidheight.

Run the following in the terminal to install geoidheight and download the EGM data.

cd ~/tools/utils
git clone https://github.com/vandry/geoidheight.git
cd ~/tools/utils/geoidheight
wget http://sf.net/projects/geographiclib/files/geoids-distrib/egm96-5.tar.bz2; tar xvjf egm96-5.tar.bz2
wget http://sf.net/projects/geographiclib/files/geoids-distrib/egm2008-1.tar.bz2; tar xvjf egm2008-1.tar.bz2

Add the following to .bash_profile file to setup geoidheight.

export PYTHONPATH=${PYTHONPATH}:~/tools/utils/geoidheight