A distortion in Earth's magnetic field could trigger the aurora borealis, or northern lights, to appear farther south than usual this weekend, but cloudy…
A distortion in Earth's magnetic field could trigger the aurora borealis, or northern lights, to appear farther south than usual this weekend, but cloudy weather could affect visibility in New EnglandSeveral bursts of magnetic energy, commonly referred to as coronal mass ejections , were launched from the Sun's surface and are now hurtling toward Earth. Some are moving slower than others and will be overtaken in route.
The culmination of energy is expected to arrive by Saturday night and distort Earth's magnetic field. It's this distortion that could trigger the aurora borealis, or northern lights, deep into the Lower 48. Auroras are caused by energized particles from the Sun traveling at up to 45 million miles per hour. When they plow into Earth's atmosphere, they are directed toward the poles, where they interact with our atmosphere , causing it to fluoresce.As these CMEs travel through space, we can often get a sense of how they travel, warp and sometimes separate. It's for this reason that these forecasts change with time.
Initially, we have found there is a robust outlook with a direct hit to Earth and corresponding northern lights deep into the mid-latitudes. What we often end up with is a muted outcome that can sometimes disappoint. This is the nature of forecasting dynamic bundles of energy in space.Our other challenge is the weather forecast. We're struggling to keep the clouds away all weekend, and Saturday night is no exception.
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