Complex sentence: According to NASA, the intensity of geomagnetic storms during Solar Cycle 24 may be elevated by a large breach in Earth's magnetic field which was discovered by the THEMIS spacecraft in 2008.
Split into simpler sentences: According to NASA, the intensity of geomagnetic storms during Solar Cycle 24 may be elevated in some areas where the Earth's magnetic field is weaker than expected. This fact was discovered by the THEMIS spacecraft in 2008.