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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 2 | Geoscience Letters

Fig. 2

From: The source detection of 28 September 2018 Sulawesi tsunami by using ionospheric GNSS total electron content disturbance

Fig. 2

Contour of STD of a travel times and b speeds estimated by the ray-tracing and beamforming technique, separately. The blue open triangles indicate the TTID locations. The white star indicates the epicenter reported by the USGS, and red crosses represent the estimated tsunami sources. The bootstrap tsunami sources by using ray-tracing (c) and beamforming (d). The yellow dots indicate the bootstrap locations of tsunami source. The white ellipses represent the 90% confidence interval for the possible tsunami source locations

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