AAVSO Sudden Ionospheric Disturbance Report
April 2017

Observers:
A118	A119	A120	A122	A131	A134	A136	A138	
A141	A142	A143	A146	A147	A149	A96	A97	

YYMMDD		Event Peak		Importance
170401		0356			2+	A122  - XRA
170401		1037			1-
170401		1956			2
170401		2145			2
170401		2155			2+
170401		2159			1
170401		2304			2+	A134  - XRA
170401		2310			1-	A138  - XRA
170402		0247			2+
170402		0758			3
170402		0807			3
170402		1044			2	A141  - QUAL
170402		1058			2
170402		1259			2+
170402		1309			3
170402		1452			1+	A141  - QUAL
170402		1508			2
170402		1627			1+
170402		1647			2	A147  - QUAL
170402		1831			2
170402		1905			3	A147  - FLA
170402		2030			1+
170402		2031			1+
170402		2049			2+	A147  - QUAL
170402		2110			1+
170403		0107			1+	A141  - XRA
170403		0504			1-
170403		0514			1-
170403		0623			1-
170403		0642			2
170403		0652			2
170403		0817			2
170403		0859			1-	A131  - QUAL
170403		0919			1+
170403		1034			2+
170403		1056			1-	A131  - QUAL
170403		1114			1+
170403		1144			1
170403		1218			1-
170403		1307			1-
170403		1324			1+
170403		1333			1-	A149  - XRA
170403		1342			1	A97   - QUAL
170403		1426			2+
170403		1435			2
170403		1701			1	A97   - FLA
170403		1912			1-	A141  - XRA
170403		1913			1	A141  - XRA
170403		1925			1-	A97   - XRA
170403		2017			1+
170403		2136			1-	A97   - QUAL
170404		0710			1
170404		0952			1+
170404		1148			1+	A119  - XRA
170404		1217			1+
170404		1342			2
170404		1702			1-	A146  - XRA
170404		1957			2	A147  - XRA
170404		2343			1
170405		0936			1
170406		0013			1-	A134  - QUAL
170406		1027			1
170406		1209			1+
170406		1715			1	A147  - XRA
170407		0026			2+
170407		0857			1+
170407		1951			1
170408		0310			3	A134  - XRA
170408		0906			2
170417		0247			2+	A122  - XRA
170417		0721			2	A122  - XRA
170418		0939			2+
170418		0947			2
170418		2005			2+
170421		0800			3+	A142  - QUAL
170423		1645			2	A141  - QUAL
170423		1645			2	A141  - QUAL
170425		2033			1+	A147  - XRA
170425		2033			1+	A147  - XRA
170426		1725			3	A141  - QUAL
170428		1808			3	A141  - QUAL



**************************************************
Importance Summary - Apr 2017
	1- events: 15
	1  events: 11
	1+ events: 17
	2  events: 18
	2+ events: 12
	3  events:  7
	3+ events:  1
 ------------------
   Total events: 81