The particulate matter, PM10, was quite high on 4 March 2013 due to dry northerly winds. The highest 30 min concentration was 372 µg/m3 at 20:00. The 24-hour average was 80 µg/m3, above the health limit of 50 µg/m3.
There were also dust storms as clearly seen on the satellite images below. Fun to follow the plume between 11:25 to13:40 (images courtesy of NASA/Rapidfire and IMO).
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