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Table 1 General occurrence of VLF bursty-patches from 2016 to 2021

From: A review of unusual VLF bursty-patches observed in Northern Finland for Earth, Planets and Space

 

2016

2017

2018

2019

2020

2021(*)

Total campaign observation days

113

216

241

206

223

120

VLF bursty-patches observation days

80

93

23

39

59

58

Percentage of campaign days with detection of VLF bursty-patches

70.8%

43.1%

9.5%

18.9%

26.5%

48.3%

  1. Summary of the observation of VLF bursty-patches compared to observation day at KAN for 2016–2021. (*) Only takes into account the data up to end of April 2021