J/A+A/440/373 Earthbound interplanetary shocks (Howard+, 2005)
Statistical survey of earthbound interplanetary shocks, associated coronal mass
ejections and their space weather consequences.
Howard T.A., Tappin S.J.
<Astron. Astrophys. 440, 373 (2005)>
=2005A&A...440..373H 2005A&A...440..373H
ADC_Keywords: Solar system ; Magnetic fields
Keywords: Sun: coronal mass ejections (CMEs) -
Sun: solar-terrestrial relations - Sun: flares - Sun: solar wind -
interplanetary medium - shock waves
Description:
This table contains space weather data based on 360 interplanetary
shocks (forward and reverse) observed by ACE during the 80 month time
period from January 1998 to August 2004. Data from ACE, WIND, LASCO
and GOES are included, as well as Dst, Ap, SC information and SEC
prediction times.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 331 508 Shock list (End at 31 Aug (day 244))
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Event number
4 A1 --- m_Seq [abcdef] Multiplicity index on Seq
5 A1 --- n_Seq [N] N: No shock
6- 9 I4 yr Date.Y ? Date (year)
11- 13 I3 d Date.D ? Date (number of the day)
15- 22 A8 "YY/MM/DD" Date Date (yy/mm/dd)
24- 25 I2 h Time.h ? Time of event, based on the measurement
of the jump in B field. (hours)
26 A1 --- --- [:]
27- 28 I2 min Time.m ? Time of event, based on the measurement
of the jump in B field (minutes)_
30- 33 F4.1 nT Bini ? Initial B field before shock
36- 40 F5.1 nT Bfin ? Final B field after shock
42- 47 F6.2 cm-3 Dini ? Initial density before shock
49- 53 F5.1 cm-3 Dfin ? Final density after shock
56- 58 I3 km/s SWini ? Initial solar wind speed before shock
60- 62 I3 km/s SWfin ? Final solar wind speed after shock
65- 71 F7.2 km/s Speed ? Shock speed, calculated using the
conservation of mass across the shock front
73- 80 A8 --- Type Type of shock (1)
81- 88 A8 --- SpCraft Spacecraft from which the shock
measurements have been made
(ACE and/or WIND)
90- 97 A8 ---- Type2 Type of shock (F: forward, R: reverse) (2)
98-106 A9 "DD-MM-YY" SCDate Date of sudden commencement (SC)
(if one occurred)
109-113 A5 --- SCTime Time of SC (if one occurred, NN-NN)
114 A1 --- --- [,]
115-117 I3 --- Ap0 ? Ap index on day of shock (3)
119-121 I3 --- Ap1 ? Ap index on day after shock (3)
123-125 I3 --- Ap2 ? Ap index two days after shock (3)
127-131 I5 --- Dstm ? Minimum Dst on day of shock (3)
133-140 A8 --- DstmTime ? Time of Minimum Dst on day of shock (3)
142-145 I4 --- Dstm1 ? Minimum Dst on day after shock (3)
147-155 A9 --- Dstm1Time ? Time of Minimum Dst on day after
shock (3) (4)
156-159 I4 --- Dstm2 ? Minimum Dst two days after shock
161-170 A10 --- Dstm2Time ? Time of Minimum Dst two days after shock
172-177 A6 --- Storm Storm type (small, medium, large), based on
the storm table outlined in the manuscript
180 A1 --- n_HCMEDate [MN] M: Missing; N: NO HALO
182-186 A5 --- HCMEDate Date and time of associated HCME(s)
188-192 A5 --- HCMETime Date and time of associated HCME(s)
194 A1 --- l_Width Limit flag on Width
195-198 I4 --- Width ? Width of CME as measured by LASCO
200-206 F7.1 --- SpeedPj ? Projected speed as measured from LASCO
height-time plots
208-211 A4 --- Cat Catalogue in which the event is noted (5)
213-217 F5.2 d TOFSpeedPj ? Estimated time of flight to Earth
(in days) given the projected speed
220-223 A4 --- f_TOFSpeedPj Does the time of flight for the HCME
correspond to the time between HCME and
shock? (yes, no)
224 A1 --- n_TOFSpeedPj [AD] A: accelerating - speed is highest
D: decelerating - speed is lowest
227-232 F6.1 km/s Speedn ? if n_TOF=no, the shock speed is listed
in this column
234-237 F4.2 d TOFSpeedS ? Estimated time of flight to Earth
(in days) given the shock speed.
239-242 A4 --- f_TOFSpeedS Does the time of flight for the HCME
correspond to the time between HCME and
shock? (yes, no)
244-248 A5 --- FlareDate Date of associated flare (if it's a C class
or greater)
250-254 A5 --- FlareTime Time of associated flare (if it's a C class
or greater)
255 A1 --- n_FlareDate [*] *: Lots of M's
257-262 A6 --- Class Class of associated flare (if it's a C
class or greater)
264 I1 d ATime.D ? Actual time of flight (day) (6)
265 A1 --- --- [d]
267-268 I2 h ATime.h ? Actual time of flight (hour) (6)
269 A1 --- --- [h]
271-272 I2 min ATime.m ? Actual time of flight (minute) (6)
273 A1 --- --- [m]
276-279 F4.2 d TFlight ? Time of flight as a fraction of the day
281-287 F7.2 km/s <Speed> ? Average speed, determined from the
distance (0.99AU) over the time of flight
289-295 F7.2 km/s SpeedIni ? Estimated initial speed given the average
speed and final shock speed
298-303 F6.2 --- HCMEWidth ? Estimated HCME width assuming the
difference between the estimated and
projected initial speed is due to
projection effects
305-311 F7.2 m/s2 Acc ? Estimated acceleration using the linear
equations of motion, assuming constant
acceleration
313-332 A20 ---- TimePred Predicted time of storm onset determined by
the SEC prediction service
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Note (1): Forward, reverse, no shock or a change to a southward-directed b
field (flip)
Note (2): Type of shock as listed in the ACE Shock List
(http://www-ssg.sr.unh.edu/mag/ace/ACElists/obs_list.html)
Note (3): Ap is the classic index of geomagnetic activity
Dst is the ring current index that measures the effects of ring
current in the magnetic field.
Note (4): For No 60 & 61, "12, - 16" modified into "12,16"
Note (5): Catalogues have the following abbreviations:
CDAW = The CDAW Data Center CME catalogue,
http://cdaw.gsfc.nasa.gov/CME_list
NRL = The NRL CME list, http://lasco-www.nrl.navy.mil/cmelist.html
H&T = the event is in neither catalogue but direct measurement by
the authors has revealed a faint HCME.
Note (6): Actual time of flight based on the difference between the first
appearance of the HCME in LASCO and the measurement of the shock
at ACE.
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Acknowledgements: Tim Howard, tim(at)star.sr.bham.ac.uk
(End) Patricia Vannier [CDS] 30-May-2005