Amateur Extra › E3 Radio Wave Propagation › E3C02
E3C02
What is indicated by a rising A-index or K-index?
Pick an answer to check it.
Answer: A. Increasing disturbance of the geomagnetic field
The A-index and K-index measure geomagnetic activity. A rising value means the geomagnetic field is becoming more disturbed, which usually hurts HF propagation.
Tip: Rising A or K = stormier field.