Tropical Cyclone Betty
● 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.
Betty at 1975-03-30 08:00:00 (BeijingTime) 在South Pacific首次被记录, peak intensity 为Category 3 tropical cyclone , max wind 约 38.6 m/s (1 分钟平均) , minimum central pressure 965 hPa, at 1975-04-12 20:00:00前后结束, total 记录 55 track points (6 h一个) .
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1975-03-30 08:00 | -17.1°S, 163.0°E | Tropical Cyclone | - | - |
| 1975-03-31 02:00 | -16.8°S, 165.7°E | Tropical Cyclone | - | - |
| 1975-03-31 20:00 | -15.9°S, 165.6°E | Tropical Depression | 16.5 | 997 |
| 1975-04-01 14:00 | -14.8°S, 166.8°E | Tropical Cyclone | - | - |
| 1975-04-02 08:00 | -13.9°S, 168.7°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1975-04-03 02:00 | -14.0°S, 169.9°E | Tropical Cyclone | - | - |
| 1975-04-03 20:00 | -14.7°S, 171.0°E | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1975-04-04 14:00 | -16.0°S, 171.8°E | Tropical Cyclone | - | - |
| 1975-04-05 08:00 | -18.2°S, 174.8°E | Category 3 tropical cyclone | 38.6 | 965 |
| 1975-04-06 02:00 | -19.8°S, 178.7°E | Tropical Cyclone | - | - |
| 1975-04-06 20:00 | -21.5°S, 179.0°W | Category 2 Tropical Cyclone | 30.4 | 980 |
| 1975-04-07 14:00 | -21.0°S, 177.3°W | Tropical Cyclone | - | - |
| 1975-04-08 08:00 | -20.0°S, 179.3°W | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1975-04-09 02:00 | -21.6°S, 177.3°E | Tropical Cyclone | - | - |
| 1975-04-09 20:00 | -24.1°S, 175.5°E | Category 1 Tropical Cyclone | 22.1 | 990 |
| 1975-04-10 14:00 | -27.0°S, 175.6°E | Tropical Cyclone | - | - |
| 1975-04-11 08:00 | -29.1°S, 175.9°E | Tropical Depression | 16.5 | 997 |
| 1975-04-12 02:00 | -31.6°S, 179.2°E | Tropical Cyclone | - | - |
| 1975-04-12 20:00 | -32.9°S, 178.1°W | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1975089S17163 / SH291975. There is no official Chinese name for this system; 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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