HEL-GEO I.D.C.E.

Catalogue of disturbances

Station Country LAT LON Station Country LAT LON Station Country LAT LON
Athens Greece N38 E24 Moscow Russia N55 E37 Slough UK N51 W1
Dourbes Belgium N50 E05 Novosibirsk Russia N55 E82 Sodankyla Finland N67 E27
El Arenosillo Spain N37 W7 St Petersburg Russia N55 E32 Sofia Bulgaria N43 E23
Fairford UK N52 W2 Podkamennaya Russia N60 E90 Sverdlovsk Russia N56 E59
Juliusruh Germany N55 E13 Poitiers France N47 E0 Tashkent Uzbekistan N41 E70
Khabarovsk Russia N48 E135 Pruhonice Czech Rep. N50 E15 Tortosa Spain N41 E0
Kiruna Sweden N68 E20 Rome Italy N42 E12 Tromso Norway N70 E19
Lannion France N49 W3 Rostov Russia N47 E40 Uppsala Sweden N60 E18
Lycksele Sweden N65 E19 San Vito Italy N41 E18 Warsaw Poland N52 E21
Magadan Russia N60 E151 Salekhard Russia N66 E66 XXXXXXXX XXXXXXXX XXX XXX

Example: WARSAW
(1) "1997 09 10 67 643" - Year 1997, Month Sep., 10% disturbed hours with reduced percentage deviations (r.p.d.) of NmF2
regarding their monthly mean exceeding +-40% (equivalent to deviations of foF2 greater than +-20%).
Counts: 67 observed hourly values of NmF2 disturbed as above for the month; 643 - number of numerical observed foF2 (NmF2) values per month.
(2) "-60 1419 1501 1502 08" - negative disturbance with mean value (r.p.d.) less than threshold -40% during 8 consequtive hours:
start at 1419 - 14 Sep. 19 h UT, end at 1502 - 15 Sep. 02 h, minimum -60% at 1501 - 15 Sep. 01 h UT.
(3) "+69 1004 1007 1014 11"
- positive disturbance during 11 hours: start at 1004 - 10 Sep. 04 h UT, end at 1014 - 10 Sep. 14 h, maximum +69% at 1007 - 10 Sep. 07 h UT

Algorithm prepared byTamara Gulyaeva (IZMIRAN Russia - tamara@izmiran.troitsk.ru) on the base of:
S.S.Kouris, D.N.Fotiadis and T.D.Xenos, On the day-to-day variation on foF2 and M(3000)F2, Adv. Space Res., Vol 22, No. 6, pp 873-876, 1998
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