This page provides a list of currently known flaring Quasi-Periodic Pulsation (QPP) events, with links to relevant articles. Although we have tried to make this list as complete as possible, there will inevitably be gaps. This list will be regularly updated, and feedback is welcome.

Also available is a seperate list of doppler shift oscillations observed with the BCS on Yohkoh, compiled by John T. Mariska. Additionally a study of X-class flares using RHESSI data by Philip Crockett yielded this list of suspected QPP events.

Theoretically, QPP in solar flares can be either linked to MHD oscillations in the flaring region or in an external coronal plasma structure, or be connected with periodic regimes of magnetic reconnection, or perhaps with some combination of these mechanisms. In both cases, the oscillations provide us with a powerful tool for the diagnostics of the physical parameters in and about the flare sites, and of the physical processes operating in them. A recent review of physical mechanisms for the generation of flaring QPP can be found in Nakariakov 2007.

Event Date	Time Start	Time End	Flare Class	Observed Periods	Bands Observed	Related Publications
22 August 2005	00:44:00 UT	02:18:00 UT	M2.6	240s	X-rays (RHESSI)	Y. P. Li and W. Q. Gan, 2008
19 January 2005	08:05:00 UT	08:30:00 UT	X1.3	2-4 min	X-rays (RHESSI)	Ofman and Sui 2006 Nakariakov et al. 2006
03 November 2003	09:45:00 UT	10:00:00 UT	X3.9	?	X-rays (RHESSI), Radio (Nancay Radioheliograph, Radio Solar Telescope Network)	Dauphin et al. 2005
29 May 2003	01:01:00 UT	01:05:00 UT	X1.2	1 min	X-rays (RHESSI)	Ning 2007 ; Minoshima et al. 2008 (QPP not analysed)
5-6 February 2003	21:00:00 UT	03:00:00 UT	C2.1, C2.2, C3.4	8-12 min	X-rays (RHESSI)	Foullon et al. 2006
03 July 2002	02:09:00 UT	02:15:00 UT	X	11s, 18s, 28s	Microwave (Nobeyama), Hard X-ray (RHESSI)	Inglis and Nakariakov, 2009
11 December 2001	08:01:00 UT	08:06:00 UT	X2.8	12s	Radio (Guaribidanur Radioheliograph, Mauritius Radio Telescope)	Ramesh et al. 2005
25 October 2001	14:42:20 UT	14:50:50	X1.3	43s, 47s	Hard X-ray (MTI)	Farnik, Karlicky and Svestka 2003
22 October 2001	17:47:40 UT	17:55:07 UT	X1.2	25s	Hard X-ray (MTI)	Farnik, Karlicky and Svestka 2003
25 August 2001	22:10:00 UT	23:00:00 UT	C9.6	40 - 80s	White light (Big Bear Solar Observatory)	McAteer et al. 2005
15 April 2001	13:19:00 UT	22:00:00 UT	X14.4	Including 64s, 77s, 90s, 98s, 111s, 170s, 300s	Radio (Ondrejov), Hard X-ray (Yohkoh)	Meszarosova et al. 2006
12 April 2001	09:39:00 UT	10:49:00 UT	X2	Including 64s, 93s, 140s, 160s, 293s, 320s	Radio (Ondrejov), Hard X-ray (Yohkoh), Soft X-ray (Yohkoh/SXT)	Meszarosova et al. 2006
29 March 2001	09:57:00 UT	10:04:00 UT	X1.7	48s	Hard X-ray (MTI)	Farnik, Karlicky and Svestka 2003
23 November 2000	05:35:00 UT	05:45:00 UT	C5.4	15s	Radio (Guaribidanur Radioheliograph)	Ramesh, Kathiravan and Narayanan 2004
14 July 2000	10:03:00 UT	10:43:00 UT	X5.7	Including 61s, 79s, 116s, 147s, 315s, 330s	Radio (Ondrejov), Hard X-ray (Yohkoh)	Meszarosova et al. 2006
12 January 2000	01:32:00 UT	01:40:00 UT	-	8-11s, 14-17s	Microwave (Nobeyama), Hard X-ray (Yohkoh)	Melnikov et al. 2005, Nakariakov et al. 2003
28 August 1999	00:55:00 UT	00:58:00 UT	M2.8	2.4s, 7s, 14s	Microwave (Nobeyama)	Stepanov et al. 2004
10 November 1998	00:12:00 UT	00:17:00 UT	C7.9	40s	Microwave (Nobeyama), Hard X-ray (Yohkoh)	Grechnev, White & Kundu 2003, Asai et al. 2001
8 May 1998	01:55:00 UT	02:00:00 UT	M3.1	16s	Microwave (Nobeyama), Hard X-ray (Yohkoh)	Stepanov et al. 2004, Inglis, Nakariakov & Melnikov 2008
5 October 1992	09:24:00 UT	09:27:00 UT	M2	4s, 28s	Radio (Ondrejov, Zurich), Hard X-ray	Kliem, Karlicky and Benz 2000
17 February 1992	08:00:00 UT	12:00:00 UT	-	180s	Radio	Chernov et al., 1998
11 July 1991	09:30:00 UT	12:00:00 UT	-	Including 35s, 30s, 24s, 19s	Radio (Crimean Astrophysical Observatory)	Baranov and Tsvetkov, 1994
20 April 1991	08:30:00 UT	10:15:00 UT	X1.0	3min, 5min	White light	Jain and Tripathy, 1998
10 June 1990	?	?	-	143s	X-ray (Granat Observatory)	Terekhov et al. 2002
15 November 1989	06:40:00 UT	07:28:00 UT	X3.2	3min, 5min	White light	Jain and Tripathy, 1998
14 November 1988	14:30:00 UT	15:13:00 UT	-	12s	Radio (Trieste Astronomical Observatory)	Zlobec et al. 1992
6 September 1981	23:53:00 UT	23:54:00 UT	-	2.5s	Hard X-ray (Solar Maximum Mission)	Desai et al. 1987
7 June 1980	03:12:00 UT	03:13:30 UT	-	8s	Microwave (Nobeyama and Toyokawa Observatories), X-rays (ISEE-3 and P78-1)	Kane et al. 1983, Kiplinger et al. 1983
6 November 1979	08:38:00 UT	08:39:00 UT	-	2s, 6s	Hard X-ray (Venera 12)	Desai et al. 1987
3 December 1978	20:30:00 UT	20:32:00 UT	-	1.7s, 0.8s	Hard X-ray (Venera 12, Prognoz 7)	Bogovalov et al. 1983, Desai et al. 1987
22 September 1978	11:56:00 UT	13:30:00 UT	-	2.1s - 2.4s	Radio	Urpo et al. 1981
12 April 1977	09:50:00 UT	10:30:00 UT	-	60s	Radio	Trottet, Pick and Heyvaerts, 1979
29 September 1968	09:30:00 UT	09:39:00 UT	-	1.7s	Radio	Abrami, 1970
8 August 1968	18:15:20 UT	18:18:00 UT	-	16s	Microwave (Sigamore Hill Radio Obs.), X-rays	Parks and Winckler 1969