SFUvNZEQER

Emission from the Sun at centimetric (radio) wavelength is due primarily to coronal plasma trapped in the magnetic fields overlying active regions.[20] The F10.7 index is a measure of the solar radio flux per unit frequency at a wavelength of 10.7 cm, near the peak of the observed solar radio emission. F10.7 is often expressed in SFU or solar flux units (1 SFU = 10−22 W m−2 Hz−1). It represents a measure of diffuse, nonradiative heating of the coronal plasma trapped by magnetic fields over active regions. It is an excellent indicator of overall solar activity levels and correlates well with solar UV emissions.

The solar F10.7 index is measured three times daily at (17:00:00, 20:00:00 and 23:00:00) or (18:00:00. 20:00:00 and 22:00:00)in a bandwidth of 100 MHz centered on 2800 MHz at the Penticton site of the Dominion Radio Astrophysical Observatory (DRAO), Canada.

The graphs below show the SFU readings for each month, with the radiated energy released in units of Tonnes of TNT per 24 hour period by earthquakes in New Zealand and the Kermadec Islands recorded by GNS (Geonet). Where an earthquake above M5 occurred this is marked by an orange rectangle around the TTNT number.

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January 2014

NZ Timeline Graph v SFU January 2014
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February 2014

NZ Timeline Graph v SFU February 2014
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March 2014

NZ Timeline Graph v SFU March 2014
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April 2014

NZ Timeline Graph v SFU April 2014
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May 2014

NZ Timeline Graph v SFU May 2014
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June 2014

NZ Timeline Graph v SFU June 2014
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January – June 2014

NZ Timeline Graph v SFU January-June 2014

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