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Table 2 Related information for the CME15, Shock and ICME17 during 15–17 March 2015

From: The first super geomagnetic storm of solar cycle 24: “The St. Patrick’s day event (17 March 2015)”

  Start timea r b Ending timec Δr d Δt e (h) V fshock/CME (km/s) Vg (km/s) Δt hpred (h) Δt iERR (h) ( %)
UT (Mar. 15) Rs UT (Mar. 17) Rs
ShockC3 2:30 6.95–18.82 03:57 204.05 49.45 796.6 668 58.97 16
ICMEC3 2:30 6.95–18.82 10:38 204.05 56.13j 701.8 668 58.96 k 5 l
ShockC2 2:00 4.15–6.61 03:57 206.85 49.95 799.5 606 65.00 30
ICMEC2 2:00 4.15–6.61 10:38 206.85 56.63 705.0 606 65.00 15
  1. aCME/shock was observed by SOHO/LASCO
  2. bLocation of leading edge of CME measured by C3 or C2 (units in Rs)
  3. cStarting point at 1 AU (Wind)
  4. dDistance between the initial point observed by C3 and Wind (units in Rs), and 1 Rs = 6.95 × 105 km
  5. eΔt: traveling time of shock/CME between 6.95 Rs and 1 AU (units in hours), and 1 AU equals to 215 Rs
  6. f V shock/CME = Δr/Δt (units in km/s)
  7. g V′: V CME/shock measured near the Sun between 6.95 and 18.82 Rs (units in km/s)
  8. hΔt prediction: predicted traveling time for shock/CME propagating from 6.95 Rs to Wind (units in hours)
  9. iΔt ERR: error on the Δt pred = (Δt pred − Δt)/Δt × 100 (%)
  10. jTraveling time of ICME17 from 6.95 Rs to Wind spacecraft, ICME was seen by C3 at 2:30 UT on 15 March and recorded by Wind at 10:38 UT on 17 March [Δt = 2 × 24 + (10–2) + (38–30)/60 = 56.13 h]. Wind orbited at 258.7 R E (GSE). Earth was at 213.938 Rs. Wind was at ~211 Rs (GSE). Therefore V CME = Δrt = (204.05 Rs/56.13 h) = 701.8 km/s
  11. k204.05 × 6.95 × 105/(668 × 3600) = 58.96 h
  12. l(58.96−56.13)/56.13 ≡ 5 %