2018_Kilauea_eruption_InSAR.zip (236.69 MB)
2018_Kilauea_eruption_InSAR
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posted on 2018-05-15, 19:13 authored by Bridget Smith-KonterBridget Smith-Konter, Lauren WardLauren Ward, Liliane Burkhard, Xiaohua Xu, David SandwellOn April 30, 2018, along the East Rift Zone of Kilauea Volcano, Pu'u 'O'o crater began to collapse, followed by increased seismicity and deformation down-rift. Observations of deflationary tilt at the summit began and small ground cracks opened near Leilani Estates on May 1-2. On May 3, eruptive surface fissures began inundating the community of Leilani Estates, marking the official onset of eruption by HVO. On May 4, 2018, a Mw6.9 earthquake struck the south flank of Kilauea, manifested as slip along a shallow dipping thrust fault with a hypocenter at ~2km depth. Increased seismicity began at the summit and has been followed by continued deflation. Along the rift zone, seismicity and deformation continue, with 18 fissure eruptions as of May 13.
The C-band Sentinel-1A satellite, operated by the European Space Agency (ESA), provides a 3-day coverage (ascending and descending tracks) of the 2018 Kilauea eruption. The data are available on the Sentinel Datahub.
This dataset provides near-real time line-of-sight deformation data from Sentinel-1. We'll keep updating data for each repeat pass and update the line-of-sight data once they are available. We also include KMZ files for Google Earth. The InSAR data are processed with open source software GMTSAR and mapped using Generic Mapping Tools (GMT). The InSAR phase are filtered with a 120m Gaussian filter. The line-of-sight data are acquired by merging different swaths' phase and then unwrapped using snaphu (there is no deramping).
Displacement due to both the ongoing eruption and the earthquake on May 4, 2018, are observed. In the line-of-sight (LOS) figures, LOS displacement with respect to the Sentinel-1A radar is provided. For ascending maps, red colors (positive) indicate motion toward the satellite (up or west) and blue colors (negative) indicate motion away from the satellite (down or east). For descending maps, red colors (positive) indicate motion again toward the satellite but now up or east, and blue colors (negative) indicate motion down or west. Atmospheric artifacts are the likely cause of anomalous displacements associated with Mauna Loa and Mauna Kea. The phase figures display wrapped interferograms, where each fringe represents 2.8 cm of ground displacement toward (or away) from the satellite.
The C-band Sentinel-1A satellite, operated by the European Space Agency (ESA), provides a 3-day coverage (ascending and descending tracks) of the 2018 Kilauea eruption. The data are available on the Sentinel Datahub.
This dataset provides near-real time line-of-sight deformation data from Sentinel-1. We'll keep updating data for each repeat pass and update the line-of-sight data once they are available. We also include KMZ files for Google Earth. The InSAR data are processed with open source software GMTSAR and mapped using Generic Mapping Tools (GMT). The InSAR phase are filtered with a 120m Gaussian filter. The line-of-sight data are acquired by merging different swaths' phase and then unwrapped using snaphu (there is no deramping).
Displacement due to both the ongoing eruption and the earthquake on May 4, 2018, are observed. In the line-of-sight (LOS) figures, LOS displacement with respect to the Sentinel-1A radar is provided. For ascending maps, red colors (positive) indicate motion toward the satellite (up or west) and blue colors (negative) indicate motion away from the satellite (down or east). For descending maps, red colors (positive) indicate motion again toward the satellite but now up or east, and blue colors (negative) indicate motion down or west. Atmospheric artifacts are the likely cause of anomalous displacements associated with Mauna Loa and Mauna Kea. The phase figures display wrapped interferograms, where each fringe represents 2.8 cm of ground displacement toward (or away) from the satellite.
