InSAR time-series for Galápagos volcanoes, Ecuador from ALOS and Sentinel-1

This repository contains the data used by Yunjun et al. (2019) and Gregg et al. (2022). It includes two InSAR time-series datasets from ALOS and Sentinel-1 satellite acquired over the Galápagos volcanoes, Ecuador.

• Yunjun, Z., H. Fattahi, F. Amelung (2019), Small baseline InSAR time series analysis: Unwrapping error correction and noise reduction, Computers & Geosciences, 133, 104331, doi:10.1016/j.cageo.2019.104331, arXiv.
• Gregg, P. M., Zhan, Y., Amelung, F., Geist, D., Mothes, P., Koric, S., & Yunjun, Z. (2022), Forecasting mechanical failure and the 26 June 2018 eruption of Sierra Negra Volcano, Galápagos, Ecuador, Science Advances, 8(22), doi:10.1126/sciadv.abm4261. 

Dataset 1: ALOS ascending track 133 frame 7160-7180

• Date: 15 Jan 2007 - 13 Mar 2011 (22 acquisitions)
• Processor: ROI_PAC + MintPy
• Configuration: GalapagosAlosAT133.template
• Interferogram stack (in HDF5/MintPy format): GalapagosAlosAT133.tar.xz
• Displacement time-series (in HDF-EOS5 format): ALOS_SM_131_7160_7180_20070115_20110313.he5
• Volcanic events covered and relevant literature:
  • Alcedo: 2010 non-eruptive unrest (Galetto et al., 2019, JGR)
  • Fernandina: April 2009 eruption (Bagnardi et al., 2013, EPSL)
  • Cerro Azul: 2008 eruption (Galetto et al., 2020, JGR)

Dataset 2: Sentinel-1 descending track 128 frame 593-597

• Date: 13 Dec 2014 - 19 Jun 2018 (98 acquisitions)
• Processor: ISCE/topsStack + MintPy
• Configuration: GalapagosSenDT128.template
• Interferogram stack (in HDF5/MintPy format): GalapagosSenDT128.tar.xz
• Interferogram stack (in HDF5/MintPy format) with 30 sequential connections: SierraNegraSenDT128.zip
  • Area extent: Sierra Negra caldera rim
  • Dimension: 2475 * 150 * 150
  • Related to Fig. 14
• Displacement time-series (in HDF-EOS5 format): S1_IW12_128_0593_0597_20141213_20180619.he5
• Volcanic events covered and relevant literature:
  • Wolf: May 2015 eruption (Xu et al., 2016, GRL)
  • Fernandina: September 2017 eruption (GVP, 2018) and June 2018 eruption (GVP, 2018)
  • Sierra Negra: inflation prior to the 26 June 2018 eruption (Gregg et al., 2022, SciAd)
  • Cerro Azul: March 2017 dike intrusion (Bagnardi et al., 2018, G3)

Useful links:

• HDF-EOS5 file (*.he5) structure is described in https://mintpy.readthedocs.io/en/latest/hdfeos5.
• HDF5/MintPy file (*.h5 after uncompressing *.tar.xz file) structure is described in https://mintpy.readthedocs.io/en/latest/api/data_structure/.
• KMZ file for displacement time-series is described in https://mintpy.readthedocs.io/en/latest/google_earth/.
• Related Jupyter Notebooks at https://github.com/geodesymiami/Yunjun_et_al-2019-MintPy.