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Here is another quake to study for usefulness of solar electron flux: It is a 6.1M quake at 04:30 UTC on 11 Jan. in the South Indian Ocean at 37S, 53E. This location is beyond the horizon of the GOES satellites covering the Americas.

The red and blue electron graphs show a sudden decline ABOVE the median about 21:00 UTC 10 Jan., followed by a very gradual decline in both to below the line, with the red line reaching the first has mark shortly after the quake. The line continues until there is again a dip about 07:00 UTC. Thus there is 7 hours from the above the line dip to the position of the line below the median at the time of the quake, but no dip in 2-4 hours interval seen with the Loyalty Island quakes.

This would support the necessity for a satellite monitor over India. It could equally argue for a longer time after a dip for earthquakes near or over the horizon for the satellite. If the electron phenomenon is fairly global, a longer interval might be available for study and giving warning using electron flux...although Pacific Rim quakes might overwhelm both American and Indian data analysis until directional analysis was more accurate.

Donald