Abstract The ionospheric D-region (~ 60 km up to~ 95 km) and the corresponding neutral
atmosphere, often referred to as the mesosphere–lower thermosphere (MLT), are …

There have been reports for many years that the ionosphere is very sensitive to seismic
effects, and the detection of ionospheric perturbations associated with earthquakes (EQs) …

The effects of solar flares on the propagation of subionospheric VLF signals from NWC and
NLK transmitter stations monitored at a low-latitude station, Suva (18.2° S, 178.4° E), Fiji …

We investigate the relation between sudden phase anomaly (SPA) amplitudes (Δφ) and
solar X‐ray flares importance and study if it has a solar activity cycle dependence. We find a …

We present recent observations of Sudden Phase Anomalies due to subionospheric
propagation anomalies produced by solar X‐ray flares. We use the new South America VLF …

The present work is the second of a three-part review of space weather in Latin America,
specifically observing its evolution in three countries (Argentina, Brazil and Mexico). This …

Using soft X‐ray measurements from detectors onboard the Geostationary Operational
Environmental Satellite (GOES) and simultaneous high‐cadence Lyman‐α observations …

Pronounced amplitude minima are observed during the subionospheric propagation of VLF
waves at times (Terminator Times) when the Terminator Line crosses given locations along …

A decade of NOAA-15 particle flux data offers an opportunity to test claims of correlations
between seismic activity and effects on the ionosphere. Over the last two decades …

Increases in the X-ray radiation that is emitted during a solar X-ray flare induce significant
changes in the ionospheric D region. Because of the numerous complex processes in the …