Tropical Cyclone Bertha/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.
Bertha/Betty at 1968-01-19 08:00:00 (BeijingTime) 在South Indian Ocean首次被记录, peak intensity 为Tropical Depression, max wind 约 18 m/s (1 分钟平均) , minimum central pressure 995 hPa, at 1968-01-26 08:00:00前后结束, total 记录 29 track points (6 h一个) . 曾Landfall或贴近land.
| Time (BeijingTime) | Position | Category (local) | wind speed m/s | Pressure hPa |
|---|
| 1968-01-19 08:00 | -12.2°S, 131.8°E | Tropical Cyclone | - | 1000 |
| 1968-01-19 20:00 | -12.2°S, 131.2°E | Tropical Cyclone | - | 999 |
| 1968-01-20 08:00 | -13.1°S, 130.0°E | Tropical Cyclone | - | - |
| 1968-01-20 20:00 | -14.2°S, 129.0°E | Tropical Depression | 12.9 | - |
| 1968-01-21 08:00 | -14.8°S, 127.3°E | Tropical Depression | 15.4 | - |
| 1968-01-21 20:00 | -15.2°S, 124.9°E | Tropical Depression | 18 | - |
| 1968-01-22 08:00 | -15.9°S, 122.3°E | Tropical Depression | 10.3 | - |
| 1968-01-22 20:00 | -16.8°S, 120.2°E | Tropical Depression | 15.4 | - |
| 1968-01-23 08:00 | -17.6°S, 118.4°E | Tropical Depression | 18 | - |
| 1968-01-23 20:00 | -17.7°S, 116.9°E | Tropical Depression | 12.9 | - |
| 1968-01-24 08:00 | -17.8°S, 115.5°E | Tropical Depression | 10.3 | - |
| 1968-01-24 20:00 | -18.7°S, 113.9°E | Tropical Depression | 10.3 | - |
| 1968-01-25 08:00 | -19.9°S, 112.3°E | Tropical Depression | 12.9 | - |
| 1968-01-25 20:00 | -21.6°S, 111.6°E | Tropical Depression | 12.9 | - |
| 1968-01-26 08:00 | -24.3°S, 111.1°E | Tropical Cyclone | - | - |
Data sources: NOAA National Centers for Environmental Information IBTrACS v04r01 (Knapp et al., 2010), code 1968019S12132 / SH181968. This basin has no official Chinese translation, so the original English name is displayed. Intensity is classified according to the local agency of the basin (converted from 1-minute sustained wind using WMO coefficients), for reference only. Data notes · Incorrect translation?
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