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ACROSS
1 Magnetic field surrounding our planet
5 A brief disturbance in the Earth's magnetosphere caused by the release of energy from the "tail" of the magnetosphere
10 An Earth-directed coronal mass ejection shows up as a ... on SOHO LASCO
11 The Kp-index goes from zero to...
13 Strong aurora below an altitude of 100km can have this color
15 The most dominant aurora color
16 A filament near the solar limb with the blackness of space as background
17 Type of overhead aurora radiating from a distant and apparent central location, which results from perspective
18 The southern lights are also known as the aurora...
19 NASA launches rockets to study aurora from this
US state
21 Solar cycles have an average duration of about ...
years
24 This NASA mission consists of two spacecraft that watch the far side of the Sun
25 The direction of the interplanetary magnetic field
(Bz) has to be ... for increased geomagnetic activity
27 The most recent X-class solar flare took place in this month
28 Short for coronal mass ejection
30 This mission will replace ACE at L1
32 A sudden eruption of energy on the solar disk, from which radiation and particles are emitted
33 Instrument used to observe coronal mass ejections
DOWN
1 Instrument used to measure geomagnetic activity
2 A unit of measurement used in space weather of the strength of the interplanetary magnetic field
3 The lowest layer of the solar atmosphere
4 Finnish name for the Aurora Borealis
6 The northern lights are also known as the aurora...
7 An average solar cycle features about ... solar radiation storms that reach the severe S4 threshold
8 This celestial object can make weak aurora harder to spot
9 The Swedish Institute of Space Physics has a magnetometer located in this city
12 Star in the center of our solar system
14 This country features the northern lights in their passports
16 Solar eruptions can launch these particles at incredibly high speeds
17 Our worst enemy
20 Polar region located at the northernmost part of the Earth where the Aurora Borealis often fills the night skies
22 An average solar cycle features about ... solar flares that reach X10 or higher
23 This ACE instrument measures the low energy electrons and protons carried with the solar wind
25 This NASA mission celebrated it's 5th year in space last February
26 Name for the innermost darkest part of a sunspot
29 Aurora is best viewed around local...
31 A sunspot group having both positive and negative magnetic polarities, with a distinct division between the polarities