AAVSO Sudden Ionospheric Disturbance Report
April 2011

Observers:
A102	A118	A119	A120	A121	A122	A124	A125	
A126	A127	A128	A80	A91	A96	A97	

YYMMDD		Event Peak		Importance
110401		0201			2+
110406		1801			2+
110407		1410			1-
110407		1637			2+
110409		1545			2+
110411		0919			2+
110411		1602			2
110411		1606			1-
110412		0608			2
110412		1228			2
110412		1230			1
110413		0629			1-
110413		0800			3+
110413		0833			1-
110413		1041			1+
110413		1321			2
110413		1344			2
110413		1607			1-
110414		0258			2+
110414		0528			2
110414		0701			1
110414		0945			1
110414		1009			1-
110414		1009			1-
110414		1025			1+
110414		1025			1
110414		1528			1
110415		0918			2+
110415		0934			2
110415		1136			1+
110415		1351			1
110415		1448			1
110415		1613			1-
110415		1713			2
110416		0056			2
110416		0359			1-
110416		0538			1+
110416		0614			1
110416		0630			2+
110416		0906			1+
110416		1401			2
110416		1411			2
110416		1653			2
110416		1950			1
110416		2315			2
110417		1415			1
110418		1245			1
110418		1602			2+
110419		1120			1-
110420		0928			1-
110420		1835			3
110420		1940			3
110421		0836			2+
110421		0947			2
110421		1451			2
110421		2210			3
110422		0444			1+
110422		0458			2
110422		0808			1+
110422		0946			2
110422		1125			2+
110422		1237			1
110422		1356			1+
110422		1449			1-
110422		1555			2
110422		1708			1
110422		1752			2+
110422		1934			1
110423		0219			1-
110423		0344			2
110423		0735			2
110424		1929			2
110425		0353			1+
110427		2330			1+
110428		1159			1+
110428		1728			1+
110430		0819			1+
110430		0904			1
110430		1150			2+
110430		1322			2



**************************************************
Importance Summary - Apr 2011
	1- events: 13
	1  events: 15
	1+ events: 13
	2  events: 22
	2+ events: 13
	3  events:  3
	3+ events:  1
 ------------------
   Total events: 80