Publication Date:
2014-06-26
Description:
Su et al . [2013] publish “Temporal and spatial precursors in ionospheric total electron content of the 16 October 1999 Mw 7.1 Hector Mine earthquake”, which shows that the temporal anomalies in the regional GPS TEC (total electron content) and GIM (Global Ionosphere Map) TEC experience both storm and earthquake effects. Masci and Thomas [2014] highlight the storm effect but disregard the earthquake one. In this paper, the northward gradients of GIM TEC over the Hector Mine, Japan and Europe region are computed, and the most prominent anomaly appearing over Hector Mine on 10 October 1999 suggests earthquake related anomaly or seismo-ionospheric precursor (SIP) being possibly observed. A logistic regression is further employed to estimate the SIP area, which reveals that the radius of observing the SIP with 95.27% probability is 5000 km.
Print ISSN:
0148-0227
Topics:
Geosciences
,
Physics