Tropical Cyclone Selma
● 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.
Selma at 1974-11-29 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为2级Tropical Cyclone , max wind 约 27.8 m/s (1 分钟平均) , minimum central pressure 980 hPa, at 1974-12-09 08:00:00前后结束, total 记录 41 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1974-11-29 08:00 | -9.0°S, 127.0°E | Tropical Depression | 13.9 | 1002 |
| 1974-11-29 20:00 | -9.8°S, 127.0°E | Tropical Cyclone | - | - |
| 1974-11-30 08:00 | -10.0°S, 127.0°E | Category 1 Tropical Cyclone | 19.5 | 994 |
| 1974-11-30 20:00 | -10.6°S, 127.0°E | Category 1 Tropical Cyclone | 24.7 | 992 |
| 1974-12-01 08:00 | -11.0°S, 126.3°E | Tropical Depression | 12.9 | 990 |
| 1974-12-01 20:00 | -11.5°S, 126.8°E | Tropical Depression | 12.9 | 985 |
| 1974-12-02 08:00 | -12.0°S, 127.3°E | Tropical Depression | 12.9 | 985 |
| 1974-12-02 20:00 | -12.0°S, 128.5°E | Tropical Depression | 12.9 | 980 |
| 1974-12-03 08:00 | -12.1°S, 130.2°E | Category 1 Tropical Cyclone | 23.1 | 980 |
| 1974-12-03 20:00 | -11.3°S, 129.8°E | Tropical Depression | 12.9 | 990 |
| 1974-12-04 08:00 | -11.6°S, 129.1°E | Tropical Depression | 10.3 | 995 |
| 1974-12-04 20:00 | -12.1°S, 127.9°E | Tropical Depression | 10.3 | 998 |
| 1974-12-05 08:00 | -12.4°S, 127.0°E | Tropical Depression | 10.3 | 998 |
| 1974-12-05 20:00 | -11.6°S, 124.5°E | Tropical Depression | 10.3 | 998 |
| 1974-12-06 08:00 | -11.4°S, 122.1°E | Tropical Depression | 7.7 | 994 |
| 1974-12-06 20:00 | -11.0°S, 119.8°E | Tropical Depression | 7.7 | 999 |
| 1974-12-07 08:00 | -11.4°S, 117.5°E | Tropical Depression | 7.7 | 1002 |
| 1974-12-07 20:00 | -12.0°S, 115.2°E | Tropical Depression | 7.7 | 1004 |
| 1974-12-08 08:00 | -12.2°S, 113.3°E | Tropical Depression | 7.7 | 1006 |
| 1974-12-08 20:00 | -12.0°S, 112.1°E | Tropical Depression | 5.1 | 1006 |
| 1974-12-09 08:00 | -11.5°S, 111.1°E | Tropical Depression | 5.1 | 1006 |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1974333S09127 / SH031975. There is no official Chinese name for this system, so the original English name is used. Intensity categories follow the local agency classification for the region, converted from 1-minute sustained winds using the WMO factor, and are for reference only. Data notes · Incorrect translation?
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