Mapping three-dimensional surface deformation by combining multiple-aperture interferometry and conventional interferometry: Application to the June 2007 eruption of kilauea volcano, Hawaii

H. S. Jung, Z. Lu, J. S. Won, M. P. Poland, A. Miklius

Research output: Contribution to journalArticlepeer-review

152 Scopus citations

Abstract

Surface deformation caused by an intrusion and small eruption during June 1719, 2007, along the East Rift Zone of Kilauea Volcano, Hawaii, was three-dimensionally reconstructed from radar interferograms acquired by the Advanced Land Observing Satellite (ALOS) phased-array type L-band synthetic aperture radar (SAR) (PALSAR) instrument. To retrieve the 3-D surface deformation, a method that combines multiple-aperture interferometry (MAI) and conventional interferometric SAR (InSAR) techniques was applied to one ascending and one descending ALOS PALSAR interferometric pair. The maximum displacements as a result of the intrusion and eruption are about 0.8, 2, and 0.7 m in the east, north, and up components, respectively. The radar-measured 3-D surface deformation agrees with GPS data from 24 sites on the volcano, and the root-mean-square errors in the east, north, and up components of the displacement are 1.6, 3.6, and 2.1 cm, respectively. Since a horizontal deformation of more than 1 m was dominantly in the north-northwestsouth- southeast direction, a significant improvement of the northsouth component measurement was achieved by the inclusion of MAI measurements that can reach a standard deviation of 3.6 cm. A 3-D deformation reconstruction through the combination of conventional InSAR and MAI will allow for better modeling, and hence, a more comprehensive understanding, of the source geometry associated with volcanic, seismic, and other processes that are manifested by surface deformation.

Original languageEnglish
Article number5503996
Pages (from-to)34-38
Number of pages5
JournalIEEE Geoscience and Remote Sensing Letters
Volume8
Issue number1
DOIs
StatePublished - Jan 2011

Keywords

  • Interferometric synthetic aperture radar (SAR) (InSAR)
  • SAR, 3-D surface deformation measurement
  • multiple-aperture interferometry (MAI)

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