Propagation Forecast Bulletin #12 de K7RA:

At 2332 UTC on March 22 the Australian Space Forecast Centre issued
a geomagnetic disturbance warning for this weekend, March 24 and 25.
“Expect the geomagnetic activity to increase to mostly Active levels
with isolated periods of Minor to Major Storm levels due to a high
speed solar wind stream associated with a negative polarity coronal
hole becoming geo-effective”. In last week’s report, ARLP011, there were no sunspots over the
reporting week. On March 15 one new sunspot appeared for a sunspot
number of 11, which is the minimum non-zero sunspot number. The
next day it was gone, then a new sunspot appeared March 17. Sunspot
numbers on March 17 and 18 were 15 and 13, then none for the rest of
our reporting week, March 19 to 21. So the average daily sunspot
number increased from 0 over the previous week to 5.6 over the most
recent 7 days, ending Wednesday March 21.

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