Earth, Planets and Space

Table 1 The signal characteristic and D-region parameters for three daytime NPM signal anomaly events

From: Lightning evolution and VLF perturbations associated with category 5 TC Yasa in the South Pacific Region

No. of events	Date (dd/mm/yy)	Time (hh:mm UT)	ΔAmplitude (dB)	Δϕ (deg)	ΔH′ (km)	Δβ (km⁻¹)
1	13/12/20	00:46	− 2.278	+ 12	+ 10.6	− 0.143
2	14/12/20	22:23	− 3.081	− 90	+ 9.7	+ 0.010
3	16/12/20	02:36	− 5.669	− 100	+ 10.6	+ 0.005

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