In the interval of 4‐10 September 2017, the Sun presented multiple solar ares from active region AR 2673. There were also coronal mass ejections that interacted with the Earth’s magnetosphere. This solar activity produced several space weather events. These events were observed with ground‐based instruments of the Mexican Space Weather Service (SCiESMEX). The MEXART radiotelescope detected highly perturbed solar transits associated with Type I radio emissions from active regions. The CALLISTO‐MEXART station detected several radio bursts including a type III associated with the X8.2 are on 10 September. The magnetometer detected variations reaching a regional K index of 8.3 during the geomagnetic storm. The ionosphere over Mexico was disturbed by different space weather phenomena with the dominant effects of the geomagnetic storm. We used TEC data to study latitudinal and longitudinal ionospheric effects in this interval. The cosmic rays monitor detected a Forbush decrease associated also with the geomagnetic storm. This low latitude instrumental network in Mexico allowed estimating the regional response to space weather events. Coincidentally with the space weather events referred above, there were also two other types of natural hazards affecting the country at that moment, the hurricane Katia category 2 in the Gulf of Mexico, and two major earthquakes (7 and 19 September 2018). The conjunction of these natural phenomena were close to creating a `worst case scenario’ in terms of civil protection reaction.
posted Oct 21, 2018, 6:53 AM by Shifu RC