Figure 5
From: Tsunami detection by GPS-derived ionospheric total electron content
(A) Hodochrone map shows variations in VTEC for PRNs 01, 11, 20, and 23 for GPS sites for two hours duration from 23 to 1 h next day of the Pisagua earthquake on April 1, 2014. (B) Hodochrone plot shows residual VTEC at various GPS sites as a function of time and epicentral distance, as obtained from PRNs 2, 12, 24, and 25 for GPS sites for two hours duration from 22 to 24 h of the Illapel earthquake on September 16, 2016. The positive and negative epicentral distances indicate the northern and southern directions regarding the Illapel earthquake epicenter, respectively. (C) The signature of AWRayleigh is shown in TEC data of PRN12 in the hodochrone.
