August 27: Activity should be rather quiet tonight. Keep an eye for negative Bz under real time space weather data. When negative, aurora can become bright even if activity is low, especially this time of year. Clear skies expected in south, west and north Iceland. Likeliest viewing time from around 11 pm. Follow us on Instagram for latest updates. Learn more: Guide on chasing the northern lights in Iceland
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When the Bz value points south, aurora is active. Faster solar wind expands the auroral oval. Higher density leads to more colourful displays.
Record of measurements at Leirvogur for the past 6 hours.
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The chart shows 3 day forecast of the Kp-index with hourly interval
The chart shows the largest daily Kp-index value