List of magnetic storms in August 1999
Days with magnetic storms — 8
16 August 1999 — Magnetic storm of level G1
17 August 1999 — Magnetic storm of level G1
18 August 1999 — Magnetic storm of level G1
19 August 1999 — Magnetic storm of level G1
20 August 1999 — Magnetic storm of level G1
23 August 1999 — Magnetic storm of level G2
24 August 1999 — Magnetic storm of level G1
30 August 1999 — Magnetic storm of level G1
Days with geomagnetic disturbances — 10
01 August 1999 — geomagnetic disturbances
04 August 1999 — geomagnetic disturbances
06 August 1999 — geomagnetic disturbances
09 August 1999 — geomagnetic disturbances
13 August 1999 — geomagnetic disturbances
15 August 1999 — geomagnetic disturbances
25 August 1999 — geomagnetic disturbances
26 August 1999 — geomagnetic disturbances
27 August 1999 — geomagnetic disturbances
31 August 1999 — geomagnetic disturbances