AAVSO Sudden Ionospheric Disturbance Report
April 2021

Observers:
A119	A120	A122	A131	A138	A143	A146	
A147	A148	A149	A150	A152	A96	A97	

YYMMDD		Event Peak		Importance
210413		0153			1-	A122  - XRA
210417		1717			3
210419		0739			1-	A149  - XRA
210419		1235			1
210419		1756			2	A147  - XRA
210419		1756			2	A147  - XRA
210419		2326			2	A148  - FLA
210420		1215			2
210420		1726			1-	A146  - XRA
210421		0500			1-	A122  - QUAL
210422		0234			2	A122  - XRA
210422		0555			1-	A152  - XRA
210422		0723			1-
210422		0923			1+
210422		1052			2
210422		1059			2	A152  - XRA
210422		1229			1+
210422		1432			1+
210422		1549			1-	A152  - XRA
210422		2010			2+	A150  - XRA
210422		2013			2
210423		0626			1
210423		2237			1-	A148  - QUAL
210423		2237			1-	A148  - QUAL
210425		0130			2	A122  - XRA
210425		1601			1-	A146  - XRA
210426		0210			1-	A122  - FLA
210429		1411			1-	A146  - XRA
210429		1758			1-	A146  - XRA



**************************************************
Importance Summary - Apr 2021
	1- events: 13
	1  events:  2
	1+ events:  3
	2  events:  9
	2+ events:  1
	3  events:  1
	3+ events:  0
 ------------------
   Total events: 29