First near-relativistic solar electron events observed by EPD onboard Solar Orbiter

Solar Orbiter First Results (Cruise Phase)

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Table 1.

Electron events observed by EPD during July 2020.

Event	1	2	3	4	5
Date	July 11	July 19	July 20	July 21	July 22
Onset (UT) ^(a)	02:33 ± 5 min	11:00 ± 1 h	20:40 ± 10 min	01:25 ± 10 min	23:40 UT ± 10 min
Type III (UT) ^(b)	02:21	10:27	20:13	01:01 ^(c)	23:32
EUV jet (UT)	02:21	no	20:20–20:56 ^(d)	01:16–01:36 ^(d)	23:33
EUV jet observer	SDO/AIA	N/A	STA/EUVI	STA/EUVI	STA/EUVI
EUV jet PA (°) ^(e)	∼302	N/A	∼70	∼70	∼70
V_sw (km/s)	No data	264	284	275	320
ϕ_Parker (CL)	204 ^(f)	121	100	100	69
Remarks				Multiple injections	Multiple injections

Notes.

^(a)

Determined at 58 keV using the telescope showing earliest onset. For multiple injections, the first onset is listed.

^(b)

Onset at 2 MHz on SolO/RPW data for events 1, 3, 4, and 5 and Wind/Waves for event 2.

^(c)

Series of type III bursts along the day.

^(d)

Series of jets.

^(e)

Position angle of the jet(s) observed over the solar limb, counter-clockwise from the solar north pole.

^(f)

No SWA data are available, footpoint was obtained assuming V_sw = 350 km s⁻¹.

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