Though sunspots have been rare this year, Sunspot AR2738 has been producing bursts which have been heard as radio static – that sounds like “ocean surf” – on shortwave.
This was posted early this morning at spaceweather.com – along with a recording:
If you have a shortwave radio, you might have heard some unusual sounds this week. Big sunspot AR2738 is producing strong bursts of radio static. “They sound like ocean surf,” says Thomas Ashcraft, who recorded this specimen on April 13th using an amateur radio telescope in New Mexico:
Credit: Observation of Thomas Ashcroft via Spaceweather.com
Please refer to the Spaceweather.com Archive for more info.
Guest Post by Troy Riedel