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% |