THE CATALOGUE OF GEOMAGNETIC PULSATIONS OF A TYPE IPDP (intervals of pulsations with diminishing period) on the observation data at geophysical observatory "Borok" E.T.Matveyeva, R.V.Shchepetnov Geophysical observatory “Borok” of UIPE of RAS Data Time, UT Period,s Notes y m d begin. end begin. end h m h m 1957 07 25 no record 1957 07 29 no record 1957 09 13 17 00 17 16 4.5 1.3 1957 09 13 17 16 18 24 2.0 1.1 1957 09 14 06 41 08 18 2.8 1.6 1957 09 14 10 54 11 21 2.7 1.5 1957 09 21 13 15 13 42 4.0 2.6 1957 09 21 16 45 16 51 3.5 3.0 1957 09 22 20 07 20 15 2.0 1.2 1957 09 23 08 19 08 37 8.0 2.4 1958 02 11 20 37 21 06 2.5 1.4 1958 07 08 16 42 17 47 6.3 1.9 1958 09 25 10 13 11 24 4.0 2.8 1958 09 25 13 05 14 03 3.0 1.9 1958 09 25 15 38 16 08 1.5 1.1 1958 10 24 14 02 14 47 11.0 4.0 1958 12 05 17 26 18 05 1.4 1.0 1959 02 25 13 54 14 38 3.3 1.5 1959 02 25 17 05 18 00 1.3 1.0 1959 07 15 17 27 18 35 4.0 0.9 1959 10 01 14 12 15 28 3.0 1.0 1959 10 26 14 40 15 10 3.7 1.2 1959 11 01 12 27 13 05 4.0 1.4 1960 02 16 15 13 15 49 4.5 1.0 1960 03 04 14 51 15 16 2.8 1.0 1960 05 06 17 15 17 56 3.0 2.0 1960 05 16 23 38 23 45 2.0 1.4 1960 05 23 21 20 21 43 2.3 2.0 1960 08 16 15 50 16 33 2.2 0.6 1960 09 29 14 40 15 45 4.7 1.7 1960 10 04 15 47 16 23 2.0 0.7 1960 10 09 14 46 15 33 2.3 0.7 1960 10 24 16 10 16 30 3.5 1.0 1960 10 24 17 10 17 31 3.3 0.6 1960 10 29 13 15 13 32 1.3 0.8 1960 11 12 17 51 18 10 2.8 0.5 1960 11 21 15 39 16 02 1.5 0.6 1960 12 06 11 59 12 52 4.0 1.1 1960 12 15 14 07 14 32 1.7 0.6 1961 01 18 13 09 13 55 3.2 1.1 1961 01 25 12 44 13 31 4.0 1.3 1961 02 03 13 27 14 31 3.5 1.2 1961 02 04 14 37 15 29 3.0 1.3 1961 02 04 18 33 19 26 2.5 0.4 1961 02 13 15 07 15 29 2.7 1.2 1961 02 16 05 25 06 02 2.7 1.0 1961 02 20 15 28 16 19 3.0 0.8 1961 02 28 11 44 12 20 2.0 1.0 1961 03 05 20 15 20 49 1.8 0.8 1961 03 19 16 52 17 03 2.3 1.0 1961 03 19 17 05 17 32 4.0 0.7 1961 03 27 15 40 16 26 4.0 1.0 1961 03 27 16 42 16 58 2.6 0.9 1961 03 27 17 00 17 33 2.0 0.7 1961 04 11 17 17 17 27 3.5 0.6 1961 04 13 15 25 15 56 2.5 1.3 1961 05 11 18 09 19 12 3.5 1.3 1961 05 28 17 34 18 28 4.0 1.1 1961 06 01 16 50 17 08 3.5 2.5 1961 07 15 14 03 14 37 4.0 1.8 1961 07 15 17 26 18 28 2.6 0.7 1961 08 29 18 16 19 21 3.6 1.3 1961 08 29 19 21 20 27 1.7 1.0 1961 08 30 12 09 12 33 3.0 1.5 1961 08 30 16 11 16 38 3.0 1.8 1961 09 05 20 37 21 20 4.0 1.5 1961 09 30 20 33 21 09 3.2 0.5 1961 10 11 20 21 21 19 2.6 1.5 1961 11 07 10 53 11 09 3.6 1.1 1961 11 18 11 45 12 24 3.0 0.5 1961 12 01 13 21 13 47 3.0 0.5 1961 12 03 12 01 12 25 3.6 1.2 1962 01 10 14 19 14 42 2.0 0.4 1962 01 19 15 44 15 54 4.5 1.2 1962 02 11 19 02 19 25 2.7 1.7 1962 02 11 19 29 19 55 2.0 1.2 1962 02 26 18 30 19 24 2.2 0.9 1962 03 12 16 40 17 01 1.7 1.3 1962 04 06 18 37 18 46 3.2 1.0 1962 04 07 14 49 15 02 4.0 1.3 1962 04 08 15 54 16 13 4.0 1.4 1962 04 11 14 11 14 24 3.6 2.0 1962 04 21 17 42 18 22 3.5 1.0 1962 04 25 19 37 19 57 3.2 2.0 1962 07 24 18 18 18 34 3.5 2.0 1962 08 24 13 09 13 17 4.0 2.0 1962 09 01 17 00 18 05 1.6 0.6 1962 10 02 07 10 07 24 4.2 2.0 1962 10 08 17 45 18 04 2.2 1.0 1962 11 15 13 20 13 35 1.8 0.9 1962 11 21 12 18 12 54 2.6 1.0 1962 12 17 16 58 17 24 1.5 0.8 1963 01 30 12 23 13 07 4.0 0.7 1963 02 13 15 24 15 44 2.5 1.0 1963 03 10 14 37 14 58 3.5 0.8 1963 04 04 18 49 19 41 2.7 1.0 1963 04 18 18 09 18 43 3.0 1.5 1963 04 27 18 54 20 04 1.7 0.8 1963 04 30 17 28 18 05 3.0 0.7 1963 05 10 16 58 17 21 4.0 1.2 1963 06 07 13 33 14 10 5.0 2.0 1963 10 19 15 28 15 46 1.8 1.2 1963 10 29 16 24 16 49 1.4 0.8 1963 11 17 17 08 17 47 1.2 0.7 1963 11 24 13 21 13 35 2.6 1.1 1963 12 29 12 50 13 07 2.0 1.0 1964 01 02 10 05 10 38 2.0 0.9 1964 01 02 11 39 12 07 1.8 0.6 1964 02 12 13 59 14 45 6.0 1.6 1964 02 17 17 57 18 17 2.3 1.8 1964 01 31 12 05 12 35 4.5 2.7 1964 02 12 14 10 14 45 3.5 1.6 1964 02 13 16 00 16 13 2.8 0.7 1964 02 20 16 09 16 26 2.4 1.5 1964 02 20 18 09 19 22 2.0 0.7 1964 02 25 17 37 18 45 3.0 0.9 1964 02 25 18 45 19 25 3.0 0.6 1964 03 04 12 09 12 27 5.0 3.0 1964 03 30 15 36 16 03 3.5 1.3 1964 03 30 16 03 17 22 3.3 0.6 1964 04 01 16 45 18 00 2.8 0.6 1964 04 18 15 55 16 17 3.3 1.0 1964 04 27 15 07 15 45 4.7 2.3 1964 05 02 14 41 15 30 2.5 1.2 1964 05 14 15 18 15 30 3.0 1.0 1964 07 17 17 26 18 23 4.0 0.7 1964 09 28 15 22 15 52 3.0 0.6 1964 10 19 15 29 16 44 2.4 1.0 1964 12 16 13 33 14 21 2.2 1.1 1965 03 03 17 11 17 53 2.3 0.6 1965 03 13 14 46 15 08 3.0 1.3 1965 05 22 19 30 20 01 4.0 2.2 1965 07 15 15 53 16 18 4.0 1.4 1965 08 02 15 48 16 36 5.7 1.7 1965 08 02 16 36 17 00 4.0 2.0 1965 08 18 19 40 20 49 2.0 0.6 1965 09 15 17 35 18 12 2.3 1.0 1965 10 02 15 06 15 41 3.5 1.2 1965 10 13 18 08 18 53 2.1 1.0 1965 10 22 18 18 18 48 2.5 1.3 1965 11 30 18 38 19 21 2.5 0.8 1965 12 04 16 21 16 55 1.4 0.9 1965 12 18 16 48 17 00 1.8 0.8 1965 12 18 17 04 17 23 2.6 1.3 1966 01 20 13 47 14 00 3.0 1.5 1966 01 22 14 02 14 18 3.2 1.1 1966 02 11 14 27 14 52 3.0 1.7 1966 02 19 16 30 17 18 2.3 0.8 1966 02 19 17 18 17 42 3.5 1.6 1966 02 19 18 42 19 38 3.6 1.0 1966 03 14 10 26 11 28 2.8 1.8 1966 03 23 12 44 13 14 4.8 1.0 1966 03 28 15 01 15 32 3.3 0.7 1966 04 01 17 42 18 14 1.9 1.0 1966 04 22 16 23 17 14 4.8 1.3 1966 07 12 09 06 10 00 6.4 3.0 1966 08 18 18 11 18 51 4.5 1.5 1966 09 06 14 44 15 01 4.8 2.6 1966 09 23 16 47 17 13 5.0 2.2 1966 09 23 17 13 17 47 3.0 1.8 1966 10 04 19 44 20 55 1.9 0.8 1966 10 30 16 43 17 21 2.7 1.1 1966 12 13 16 17 16 34 3.6 1.5 1967 01 07 13 09 13 31 3.0 1.2 1967 01 13 13 58 14 41 4.0 1.2 1967 09 13 16 16 17 05 3.0 0.8 1967 11 22 12 28 13 27 5.4 2.0 1967 11 28 17 12 17 35 4.0 1.6 1967 12 18 14 57 15 30 2.3 1.1 1968 03 10 15 19 15 31 3.5 1.7 1968 04 05 15 30 15 48 3.7 1.9 1968 04 05 18 14 19 11 2.0 1.2 1968 05 18 18 14 18 28 4.0 0.9 1968 06 11 no record 1968 06 12 no record 1968 09 12 14 49 15 03 2.2 1.0 1968 10 19 20 07 20 35 2.6 1.0 1968 12 03 13 57 14 16 1.7 1.2 1968 12 08 14 01 14 30 2.4 1.7 1969 03 16 09 46 10 27 5.8 1.7 1969 05 02 13 27 14 07 2.9 2.1 1969 08 19 17 00 17 36 2.3 1.3 1970 01 16 15 53 16 09 3.6 1.5 1971 01 28 15 31 15 59 2.5 0.7 1971 02 15 15 30 16 45 4.0 1.0 1971 02 15 17 48 18 07 4.0 1.5 1971 03 30 18 21 19 43 3.5 1.8 1971 09 04 19 31 21 04 3.5 1.3 4.0 1.3 1971 09 09 15 51 16 36 3.8 1.3 1972 01 15 17 01 18 24 1.9 0.9 2.2 0.5 1972 02 17 17 46 18 30 2.7 0.6 1972 06 17 17 12 18 00 2.7 1.0 1972 08 10 14 00 15 00 2.7 1.3 1972 08 11 17 53 18 28 1.8 0.9 1972 08 11 18 28 19 52 2.3 1.3 1972 08 11 19 52 22 05 2.0 0.8 1972 09 13 15 15 16 04 5.3 0.8 1972 09 29 16 00 17 23 3.6 1.0 1972 10 20 18 05 18 17 1.6 0.9 1972 11 16 12 40 12 58 3.0 1.6 1972 11 16 13 15 14 00 4.0 1.7 1972 11 22 14 50 15 39 5.0 1.0 1972 11 28 14 55 15 32 2.7 1.0 1972 12 13 17 22 17 37 2.3 0.5 1973 02 18 17 12 17 53 2.7 1.0 1973 02 21 17 09 19 11 2.0 0.7 1973 02 26 13 45 15 21 2.3 1.0 1973 03 05 11 52 13 03 2.1 0.6 1973 03 31 16 54 17 37 4.0 0.7 1973 06 18 18 55 19 02 2.0 1.0 1973 08 13 17 35 18 45 3.6 1.5 1973 08 13 18 58 19 55 2.3 0.9 1973 08 22 18 51 19 20 1.5 1.0 1973 08 27 17 43 17 53 4.0 1.7 1973 11 13 15 28 16 01 1.8 1.0 1973 11 24 15 56 16 16 2.0 0.6 1973 12 04 18 00 18 26 1.4 0.6 1973 12 20 16 45 17 16 2.0 1.0 1974 01 18 16 54 17 17 2.0 0.7 1974 01 25 15 30 16 17 1.6 0.5 1974 03 16 15 10 15 53 1.7 0.7 1974 03 16 16 27 17 44 1.9 0.5 1974 03 23 12 12 12 43 3.6 1.9 1974 03 23 14 55 15 12 1.4 0.7 1974 03 25 18 02 18 40 1.2 0.7 1974 03 26 18 03 18 42 1.5 1.0 1974 03 31 20 11 20 50 1.1 0.7 1974 04 23 15 12 15 48 3.5 1.0 1974 05 02 15 20 15 57 4.5 2.9 1974 06 15 12 48 13 20 4.7 2.0 1974 07 04 14 54 17 44 3.0 1.1 1974 07 05 14 29 15 32 3.0 0.6 1974 08 22 11 06 11 57 3.9 2.3 1974 09 20 15 08 15 28 4.5 0.6 1974 09 25 12 40 13 02 4.9 2.4 1974 09 25 13 15 13 41 5.9 2.6 1974 09 26 14 43 15 20 2.5 0.8 1974 11 11 15 12 15 43 1.7 0.4 1974 11 11 16 11 16 26 0.9 0.4 1974 12 09 15 55 16 15 1.7 0.4 1975 01 27 16 39 17 10 3.0 0.9 1975 01 31 17 10 18 02 3.0 0.8 1975 04 20 17 03 18 27 2.2 0.8 1975 05 05 09 30 10 07 5.0 2.2 1976 02 07 14 31 14 57 2.4 1.3 1976 03 23 18 10 18 54 2.5 1.4 1976 04 05 15 11 16 46 2.2 1.2 1976 05 06 19 00 19 37 2.5 1.3 1976 06 28 no record 1976 09 18 10 34 11 12 3.7 2.0 1976 10 18 12 47 13 52 2.7 1.8 1976 10 30 13 50 14 33 2.1 1.0 1976 10 30 17 05 17 30 2.2 1.0 1976 12 08 12 37 13 05 2.0 1.2 1977 05 11 16 35 17 48 2.0 0.9 1977 08 25 16 06 16 37 3.7 0.7 1977 09 28 15 11 15 58 2.2 0.9 1977 10 18 18 56 19 46 1.6 0.8 1977 10 20 16 59 18 03 1.6 1.0 1977 10 21 13 41 14 45 3.6 2.0 1978 01 16 17 12 18 06 4.3 1.3 1978 02 22 16 34 17 48 3.4 0.7 1978 03 16 17 10 17 31 2.5 0.8 1978 06 30 12 32 13 24 6.7 2.5 1978 08 31 08 51 09 08 3.7 1.9 1978 06 31 12 02 12 30 6.0 2.3 1978 09 25 16 05 16 17 5.0 0.8 1978 09 25 16 17 16 24 2.3 0.8 1978 10 29 14 13 14 32 2.0 1.3 1978 12 04 16 40 17 21 5.6 2.0 1978 12 24 11 27 12 00 4.5 1.5 1978 12 25 13 57 14 12 4.3 1.7 1978 12 25 14 20 14 34 2.7 0.8 1979 01 07 15 45 15 58 4.3 1.1 1979 02 04 15 41 16 01 5.0 1.7 1979 05 22 11 00 12 03 5.0 3.0 1979 08 10 17 39 18 52 5.4 1.7 1979 03 11 no record 1979 03 12 no record 1979 03 13 no record 1979 03 14 no record 1979 03 15 no record 1979 03 16 no record 1979 03 17 no record 1979 03 18 no record 1979 03 19 no record 1979 03 20 no record 1979 03 21 no record 1979 03 22 no record 1979 03 23 no record 1979 03 24 no record 1979 03 25 no record 1979 03 26 no record 1979 03 27 no record 1979 03 28 no record 1979 03 29 no record 1979 03 30 no record 1979 03 31 no record 1979 04 01 no record 1979 04 02 no record 1979 04 03 no record 1979 04 04 no record 1979 04 05 no record 1979 04 06 no record 1979 04 07 no record 1979 04 08 no record 1979 04 09 no record 1979 04 10 no record 1979 04 11 no record 1979 04 12 no record 1979 04 13 no record 1980 01 01 15 29 16 15 2.5 1.0 1980 02 19 no record 1980 09 12 15 14 15 52 4.0 1.3 1980 10 31 14 15 14 59 6.0 1.0 1980 12 11 15 56 16 18 5.2 3.0 1981 03 05 11 24 11 49 9.4 1.9 1981 03 05 15 05 16 53 7.8 4.0 1982 03 01 14 33 15 49 6.0 2.0 1982 03 31 17 36 18 11 4.7 2.6 1982 08 22 12 50 13 24 5.7 3.3 1982 10 07 11 02 12 00 5.0 3.0 1982 10 07 13 01 13 55 4.0 1.8 1982 10 25 13 34 14 03 4.0 1.0 1982 11 23 16 33 17 00 2.8 0.6 1982 11 24 18 03 18 58 8.0 2.0 1983 01 09 16 39 17 08 2.1 0.8 1983 03 15 13 41 14 03 6.0 1.9 1983 03 24 no record 1983 03 25 no record 1983 03 26 no record 1983 03 27 no record 1983 03 28 no record 1983 03 29 no record 1983 04 04 16 45 17 30 2.0 0.9 1983 05 11 17 31 18 04 2.5 0.4 1983 09 23 11 15 12 34 5.0 3.0 1983 09 23 13 29 14 23 4.0 2.3 1983 09 23 14 43 15 26 4.0 1.9 1983 09 15 17 10 18 39 4.5 0.6 1983 09 17 17 02 18 11 4.0 1.4 1983 09 20 16 32 17 05 3.3 1.0 1983 09 28 13 14 14 03 5.5 1.6 1983 10 02 15 51 17 06 3.5 1.2 1983 10 04 14 49 15 37 4.5 0.5 1983 10 29 13 37 14 02 3.4 2.0 1983 10 30 15 06 15 28 2.7 0.8 1983 11 11 11 33 12 53 3.0 1.9 4.5 1.3 1983 11 28 16 32 17 06 2.5 1.1 1983 11 28 17 39 18 38 2.5 0.8 1983 12 11 12 12 12 49 4.0 2.7 1983 12 30 10 06 10 59 4.0 1.6 1983 12 30 16 14 16 38 3.3 0.8 1983 12 30 16 38 17 04 4.0 0.7 1984 02 10 17 47 18 13 1.7 0.7 1984 03 16 14 55 15 46 2.4 0.5 1984 03 25 16 02 16 28 2.3 0.6 1984 06 24 19 33 20 47 4.0 1.3 1984 06 25 no record 1984 06 26 no record 1984 06 27 no record 1984 06 28 no record 1984 06 29 no record 1984 07 11 16 37 17 02 5.4 2.3 1984 08 11 15 32 17 11 4.5 1.0 1984 08 27 12 02 12 58 5.0 1.3 1984 08 27 16 02 17 41 3.5 0.6 1984 09 04 14 56 15 35 1.3 0.3 1984 09 21 11 45 11 56 3.7 2.3 1984 09 22 19 46 20 11 2.3 0.8 1984 09 25 13 28 14 05 1.4 0.7 1984 10 19 13 43 14 23 2.9 0.9 1984 10 19 16 26 16 43 1.4 0.5 1984 10 23 11 11 14 58 2.9 0.8 1985 01 22 16 35 17 23 5.0 3.2 5.0 2.8 1985 02 01 09 10 09 42 2.6 1.3 1985 02 05 14 25 15 23 4.5 0.9 1985 02 06 12 00 12 44 2.6 1.5 1985 05 15 15 32 16 35 3.8 1.8 1985 06 26 no record 1985 06 27 no record 1985 06 28 no record 1985 06 29 no record 1985 06 30 no record 1985 09 06 15 56 17 00 3.0 1.2 1985 09 06 17 21 18 12 3.0 1.3 1985 10 21 16 10 16 58 3.0 0.7 1985 11 01 14 34 15 06 2.2 1.2 1985 11 01 15 12 15 36 3.0 1.0 1985 11 02 15 33 16 12 2.4 0.7 1985 11 13 13 41 13 55 3.5 1.5 1985 11 27 13 47 14 24 3.4 1.0 1986 03 07 16 16 16 58 2.3 0.9 1986 03 13 15 59 16 51 2.4 0.8 1986 03 24 14 23 14 45 3.0 0.8 1986 04 10 15 40 16 08 3.0 1.8 1986 06 29 17 06 17 37 2.9 1.3 1986 08 19 no record 1986 08 20 no record 1986 08 21 no record 1986 09 13 15 25 16 34 5.0 0.9 1986 10 27 14 08 15 47 2.5 0.7 1986 10 27 16 13 17 10 2.5 0.8 1986 11 30 15 37 16 36 3.0 1.0 1987 01 20 15 38 17 03 1.7 1.1 2.3 0.7 1987 03 18 17 09 17 41 3.4 1.8 1987 03 28 12 33 13 14 6.0 2.3 1987 04 04 14 40 15 44 3.6 0.8 1987 04 08 19 48 20 48 2.4 0.9 1987 04 09 18 42 19 34 2.5 1.5 1987 08 23 16 25 17 24 3.3 1.0 1987 08 30 16 59 17 12 3.0 1.3 1987 08 31 13 12 13 55 4.0 2.2 1987 08 31 15 03 15 36 2.4 1.3 1987 09 01 12 08 12 31 4.4 1.8 1987 09 22 17 18 18 37 2.5 0.6 1987 10 11 15 30 16 09 2.3 0.6 1987 10 14 15 26 15 49 2.5 1.3 1987 10 26 11 14 12 13 3.5 2.0 1987 10 27 11 55 12 42 4.4 1.2 1987 10 31 19 11 19 28 2.0 1.0 1987 11 02 15 26 15 42 3.1 1.5 1987 11 13 16 33 16 44 4.0 1.0 1987 11 19 16 05 16 36 2.6 1.0 1987 11 23 11 48 13 00 4.0 2.3 3.7 1.8 1987 12 10 14 41 16 21 2.3 0.9 1.8 0.7 1988 02 16 16 45 17 06 5.0 0.9 1988 03 06 14 55 15 27 4.5 0.8 1988 03 25 15 45 16 26 3.0 1.0 1988 05 17 13 28 14 26 6.0 0.5 1988 11 05 13 07 13 50 4.2 1.7 1988 11 06 14 58 15 24 4.5 2.0 1988 11 07 16 37 16 47 2.3 1.0 1988 11 26 12 19 12 48 3.3 1.4 1988 12 11 14 57 15 23 2.6 1.3 1989 01 31 14 37 14 44 3.5 2.0 1989 01 31 15 17 15 38 2.8 1.7 1989 03 13 22 03 22 41 2.3 1.0 1990 10 20 14 48 15 55 1.5 0.8 1991 no ipdp 1992 08 03 no record 1992 08 04 no record 1992 08 27 13 01 13 39 5.0 2.5 1992 10 12 11 59 12 47 3.0 0.7 1992 12 17 17 00 17 49 3.0 1.2 2.3 0.7