Geomagnetic activity level

Quiet

Agitated

Active

Minor storm

Moderate storm

Intense storm

Severe storm

Extreme storm

Kp

Kp < 27

27 ≤ Kp < 37

37 ≤ Kp < 47

47 ≤ Kp < 57

57 ≤ Kp < 67

67 ≤ Kp < 77

77 ≤ Kp < 87

87 ≤ Kp ≤ 90