Recent TEC anomalies/Chile/Argentina M5+ events

[Karma: 37 pts]

HookEcho

August 2, 2017 at 4:58 am #2350

In the paper: A statistical investigation of pre-earthquake ionospheric TEC anomalies: it states:
“among the 50 earthquakes, 47 were proceeded by apparent anomalous increases and/or decreases within 10 days before the earthquakes”
Also stating ionospheric TEC anomalies can appear before earthquakes of magnitude greater than 5.0.

A persistent Total Electron content [TEC] anomaly appeared on South America’s TEC map 07/23/2017 beginning at approx. 0:00 UTC.
Within a 10 day window, two seismic events M5+ occurred:
M5.1 – 98km ESE of Antofagasta, Chile 2017-07-26 10:11:02 UTC at a depth of 75.7 km.
M5.6 – 53km WNW of Vinchina, Argentina 2017-08-01 06:13:53 UTC at a depth of 85.1 km.

If we compare the anomalies to the epicenters: https://drive.google.com/file/d/0B83EkoitOiKQV05YOHRjWlBxOWc/view?usp=sharing

Take in account sometimes the anomaly does not appear directly over the epicenter, possibly due to vertical range errors in Vtec data. Also these types of anomalies can appear further along a fault away from the actual epicenter, for example, this TEC anomaly occurred 04-27-2017 and the next day, *M5.9 – 37km WSW of Valparaiso, Chile 2017-04-28 15:30:06 UTC:* https://drive.google.com/file/d/0B83EkoitOiKQbXRLVU1vM0NaNDA/view?usp=sharing

Score: 0