(HERALD SUN) Solar flares from a massive sunspot could reach Earth, space weather observers say.

A pair of solar eruptions on Monday sent so-called coronal mass ejections towards earth that could arrive tomorrow, causing moderate geomagnetic storms and auroras in northern latitudes, spaceweather.com said.

A group of sunspots some 100,000km across emerged at the weekend, signaling the possibility of further solar storms.

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