Ionospheric Anomaly associated with Xiaolin Mudslide following Typhoon Morakot in Taiwan: Two-Dimensional Principal Component Analysis (2DPCA)

Abstract

This paper reports on the application of two-dimensional Principal Component Analysis (2DPCA) to characterize the two dimensional total electron content (TEC) in the ionosphere associated with the Xiaolin mudslide at 10:09 August, 8, 2009 (UTC) in the aftermath of Typhoon Morakot. Our results revealed a five minute TEC anomaly over the location of the Xiaolin mudslide (23.162°N and 120.644°E) from 10:15 to 10:20 (UTC). This paper tries to address the cause of the TEC anomaly, in particular considering high-speed shock waves in the form of an impulse wave produced by mudslide, more dense TEC data are still necessary to confirm this hypothesis.

Keywords:

• Two-Dimensional Principal Component Analysis (2DPCA)
• Total Electron Content (TEC)
• Xiaolin mudslide
• typhoon Morakot
• shock wave
• impulse wave