Tropical Cyclone Ivan
● Data reliability: Generally reliable——Aircraft entered typhoons for in situ measurements, but satellites were not yet widespread: tracks are generally accurate, while intensities may be biased, with weaker cyclones potentially going unrecorded from 1950 until the advent of satellite coverage.
Ivan at 1979-03-16 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Severe Tropical Storm, max wind 约 30.9 m/s (1 分钟平均) , minimum central pressure 988 hPa, at 1979-03-21 14:00:00前后结束, total 记录 22 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1979-03-16 08:00 | -13.0°S, 92.0°E | Tropical Depression | 15.4 | 998 |
| 1979-03-16 14:00 | -13.3°S, 91.7°E | Tropical Depression | 15.4 | 997 |
| 1979-03-16 20:00 | -13.6°S, 91.6°E | Tropical Depression | 18 | 996 |
| 1979-03-17 02:00 | -14.1°S, 91.5°E | Tropical Depression | 18 | 995 |
| 1979-03-17 08:00 | -14.6°S, 91.3°E | Category 1 Tropical Cyclone | 20.6 | 994 |
| 1979-03-17 14:00 | -15.3°S, 90.8°E | Category 1 Tropical Cyclone | 23.1 | 993 |
| 1979-03-17 20:00 | -16.0°S, 90.1°E | Category 1 Tropical Cyclone | 25.7 | 992 |
| 1979-03-18 02:00 | -16.5°S, 89.5°E | Moderate Tropical Storm | 23.1 | 991 |
| 1979-03-18 08:00 | -16.9°S, 88.9°E | Moderate Tropical Storm | 20.6 | 990 |
| 1979-03-18 14:00 | -17.4°S, 88.0°E | Moderate Tropical Storm | 20.6 | 989 |
| 1979-03-18 20:00 | -18.0°S, 87.2°E | Moderate Tropical Storm | 20.6 | 988 |
| 1979-03-19 02:00 | -18.9°S, 87.1°E | Moderate Tropical Storm | 20.6 | 988 |
| 1979-03-19 08:00 | -19.7°S, 86.7°E | Moderate Tropical Storm | 20.6 | 989 |
| 1979-03-19 14:00 | -20.3°S, 86.3°E | Moderate Tropical Storm | 25.7 | 990 |
| 1979-03-19 20:00 | -20.7°S, 85.8°E | Severe Tropical Storm | 30.9 | 991 |
| 1979-03-20 02:00 | -21.2°S, 85.3°E | Severe Tropical Storm | 28.3 | 991 |
| 1979-03-20 08:00 | -21.6°S, 84.5°E | Moderate Tropical Storm | 25.7 | 992 |
| 1979-03-20 14:00 | -22.0°S, 83.4°E | Moderate Tropical Storm | 23.1 | 993 |
| 1979-03-20 20:00 | -22.7°S, 82.3°E | Tropical Depression | 18 | 994 |
| 1979-03-21 02:00 | -23.4°S, 81.6°E | Moderate Tropical Storm | 19.5 | 995 |
| 1979-03-21 08:00 | -23.9°S, 80.9°E | Tropical Depression | 16.5 | 996 |
| 1979-03-21 14:00 | -24.4°S, 80.4°E | Tropical Cyclone | - | - |
Data source: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1979075S13092 / SH201979. There is no official Chinese name for this system, so the original English name is used. Intensity is classified by the local agency for the region, converted from 1-minute sustained winds using the WMO coefficient, and is provided for reference only. Data notes · Incorrect translation?
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