Hα Flare Observation

Hα flare observations were made with the Hα Monochromatic Heliograph in 1964-1991 and the Automatic Flare Patrol Telescope since 1992.

For more details of Hα-flare observations at Mitaka, see a report below;
“A History of Routine Observations of Solar Hα Flares at the Tokyo Astronomical Observatory” (in Japanese).

Flare List

Explanatory Note (pdf)

2000	2001	2002
		1992	1993	1994	1995	1996	1997	1998	1999

The files are named "mtflYYMM.txt", where 'YYMM' is the year and month of observation.

Flare Patrol Hours

2000	2001	2002
		1992	1993	1994	1995	1996	1997	1998	1999

The files are named "mtphYYMM.txt", where 'YYMM' is the year and month of observation.

Monochromatic Heliograph: Flare Images, Low Resolution (jpg file, 850x525 pixels)

1990	1991	1992
1980	1981	1982	1983	1984	1985	1986	1987	1988	1989
1970	1971	1972	1973	1974	1975	1976	1977	1978	1979
				1964	1965	1966	1967	1968	1969

The image orientation is celestial north at the top and west to the right.

The files are named "haYYMMDDhhmm-nnn.jpg", where 'YYMMDD' is the date of observation, 'hhmm' is the JST(=UT+9) time of the flare, and 'nnn' is the serial number of frames.

Monochromatic Heliograph: Flare Images, High Resolution (jpg file, 1700x1050 pixels)

1990	1991	1992
1980	1981	1982	1983	1984	1985	1986	1987	1988	1989
1970	1971	1972	1973	1974	1975	1976	1977	1978	1979
				1964	1965	1966	1967	1968	1969

The image orientation is celestial north at the top and west to the right.

The files are named "haYYMMDDhhmm-nnn.jpg", where 'YYMMDD' is the date of observation, 'hhmm' is the JST(=UT+9) time of the flare, and 'nnn' is the serial number of frames.

Flare Event Log (jpg file, 2803x1984 pixels)

1980	1981	1982	1983	1984
1970	1971	1972	1973	1974	1975	1976	1977	1978	1979
1960	1961	1962			1965	1966	1967	1968	1969
								1958	1959

The files are named "fcYYMMDDhhmm.jpg", where 'YYMMDD' is the date of observation and 'hhmm' is the time (UT) of the flare.