At the same time, satellite observations showed a big increase in infrared emissions from above the epicentre, which peaked in the hours before the quake. In other words, the atmosphere was heating up.
Technology ReviewThursday, May 19, 2011
Atmosphere Above Japan Heated Rapidly Before M9 Earthquake
Before the M9 earthquake, the total electron content of the ionosphere increased dramatically over the epicentre, reaching a maximum three days before the quake struck.
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