AAVSO Sudden Ionospheric Disturbance Report
September 2025

Observers:
A118	A119	A131	A136	A138	A141	
A148	A152	A153	A154	A96	

YYMMDD		Event Peak		Importance
250901		1923			1
250901		2102			2	A153  - QUAL
250902		1423			1-	A118  - QUAL
250902		1451			2
250902		1452			2	A141  - FLA
250902		2103			1
250903		1525			1
250903		1911			1	A153  - FLA
250903		1925			2	A148  - FLA
250903		2208			1+	A148  - QUAL
250904		0035			1+	A153  - FLA
250904		1344			2
250904		1346			1+	A141  - FLA
250905		1800			1-	A153  - QUAL
250906		1041			1+
250906		1050			2+	A152  - QUAL
250906		1856			2
250906		2217			2
250907		0050			1-	A153  - FLA
250907		0654			1+
250907		0701			2+	A152  - QUAL
250907		0759			2
250907		0939			2
250907		1013			1
250907		1050			2
250907		1058			2+	A96   - QUAL
250907		1245			1+
250907		1251			3+	A154  - FLA
250907		1557			2
250907		1814			2
250911		1521			2
250914		0939			2	A131  - QUAL
250914		1524			1+
250915		1832			2
250916		1201			1+	A131  - FLA
250918		1542			1-	A131  - FLA
250919		2115			1
250919		2138			2
250919		2141			2+
250919		2213			2	A141  - QUAL
250920		2011			2
250921		1742			1+	A148  - QUAL
250921		2115			1+
250922		1613			1	A148  - QUAL
250923		1035			2
250924		0928			2
250924		1250			1
250924		1702			1-	A118  - QUAL
250924		1909			2
250925		1402			1
250926		1719			1	A148  - QUAL
250926		1905			2
250926		1959			1+
250926		2006			2+
250926		2053			1-
250926		2235			3+	A153  - QUAL
250927		0715			1+
250927		0938			2	A131  - QUAL
250927		1316			1+
250927		1628			1	A148  - QUAL
250927		1753			1+
250927		1811			2	A148  - QUAL
250927		1953			1+
250928		0844			2+
250928		1015			3+	A154  - QUAL
250928		1100			1+
250928		1141			1+
250928		1256			1-
250928		1326			2+
250928		1333			2+
250928		1647			1-	A148  - QUAL
250928		1745			1-	A148  - FLA
250928		1954			1+
250928		2034			2
250928		2151			1-
250929		0722			2	A136  - QUAL
250929		0801			2	A136  - QUAL
250929		0915			1
250929		1115			1-
250929		1137			1
250929		1200			1-
250929		1220			1+
250929		1425			1	A96   - FLA
250929		2013			1-	A148  - QUAL
250929		2013			1-	A148  - QUAL
250930		0454			1-	A96   - QUAL
250930		0940			2
250930		1225			2+
250930		1227			2+
250930		2141			2+	A148  - FLA
250930		2141			2+	A148  - FLA



**************************************************
Importance Summary - Sep 2025
	1- events: 15
	1  events: 14
	1+ events: 19
	2  events: 28
	2+ events: 12
	3  events:  0
	3+ events:  3
 ------------------
   Total events: 91