On the morning of December 14th, MozCast registered the largest 24-hour Google ranking flux on record since we started tracking data in early April. The temperature for Thursday, December 13th was 102.2° F (for reference, the original Penguin update was 93.1°): This was especially striking since I had just rolled out a small fix in our computations for a problem that was slightly overestimating temperatures on some days since the rollout of 7-result SERPs.

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