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Table 5
Observed, predicted and expected weak SPEs of solar cycle 24.
| Event No. | Date of event | Intensity I max (≥10 MeV), pfu | Source location | Flare class | CME speed (km/s) | Comments references |
|---|---|---|---|---|---|---|
| 1 | 7 Mar 2011 | 50 | N24W59 | M3.7/S | NW2000 | NOAA, (2018), Makhmutov et al. (2013) |
| 2 | 23 Jan 2012 | 6310 | N28W36 | M8.7 | 2175 | Belov et al. (2015a,b), Makhmutov et al. (2013) |
| 3 | 27 Jan 2012 | 796 | N27W71 | X1.7 | 2508 | Belov et al. (2015a,b), http://gle.oulu.fi |
| 4 | 07 Mar 2012 | 6530 | N17E15 | X5.4 | 1825 | Belov et al. (2015a,b), http://gle.oulu.fi |
| 5 | 13 Mar 2012 | 469 | N18W62 | M7.9 | 1884 | Belov et al. (2015a,b) |
| 6 | 17 May 2012: Rather weak GLE | 255 | N12W83 | M5.1 | 1582 | Li et al. (2013), four polar NMs, maximum ~16% by 5-minute data |
| 7 | 22 May 2012 | 1660 | N15W70 | M5.0 | 1466 | Li et al. (2015) |
| 8 | 23 July 2012 | 5000 | Backside | Backside | Partial halo | Gopalswamy et al. (2016) |
| 10 | 19 Nov 2013 | – | S70W14 | – | – | Makhmutov et al. (2015) |
| 11 | 06 Jan 2014: Weak GLE? Sub-GLE? Observed by several NMs (South Pole, Barentsburg, Tixie, McMurdo and others) | I max (≥1.0 GV) = 1.11 × 10−4, pfu | S18W102 | N.O. | 2095 | Thakur et al. (2014), Balabin et al. (2015), Li et al., (2016), Miroshnichenko & Yanke, 2016, http://gle.oulu.fi |
| 12 | 06 Jan 2014 Standard SPE (GOES) | 1033 | S15W11 | X1.2 | NOAA (2018) – observed | |
| 13 | 07 June 2015 Pérez-Peraza & Juárez-Zuñiga (2015): Predicted GLE? | N.O. | N.O. | N.O. | N.O. | Unusual increase of unknown nature; Sub-GLE? http://gle.oulu.fi |
| 14 | 22 Jun 2015 | 1070 | N13W00 | M2.0 | Full halo | NOAA (2018) – observed |
| 15 | 29 Oct 2015: Weak GLE? Sub-GLE? | 23 (NOAA, 2018) | Far-sided on W limb S11/29 02:36 | Far-sided on W limb S11/29 02:36 | N.O. | Predicted GLE: Pérez-Peraza & Juárez-Zuñiga (2015); Sub-GLE observed by two NMs (South Pole and Dome C) ((Augusto et al., 2016; Mishev et al., 2017); http://gle.oulu.fi |
| 16 | 10 September 2017: Rather weak GLE | 1490 (NOAA, 2018) | S08W83 | X8 (8.9?) | Asymmetric full halo/10 16:00 UT | GLE, maximum 6% on 2-minute NM data (Kurt et al., 2018) |
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