Journal of the Meteorological Society of Japan. Ser. II

On the earthquake in the Bay of Chijiwa

Saemontaro Nakamura

1923 Volume 1 Issue 1 Pages 1-12_1
Published: January 10, 1923
Released on J-STAGE: February 05, 2009

DOIhttps://doi.org/10.2151/jmsj1923.1.1_1

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27 persons were killed, 11 were injured and 182 houses were ruined by the earthquake occurred near Nagasaki on the 8th, of December 1922. Microseismic observations at several stations, directions and durations of the earth-sound in the epicentral region and direction and intensity of shocks, are all explained by locating the epicenter in the Bay of Chijiwa. It had the typical tectonic charactors regarding to the time distribution of after-shocks, to the distribution of the direction of the first movement at stations about the epicentre. The axis of the dislocation deduced by the first movement just coinsides with a geographical (probablly geological) feature of the locality. It caused no changes on Mt. Unzen, which is an active volcano quite near the epicentre of this earthquake. It may be supposed that this earthquake has no direct relation with the volcanic eruption of Mt. Unzen.

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Summary of Pilot Balloon Observations at Tokorozawa

Y. Sekine

1923 Volume 1 Issue 1 Pages 13-17
Published: January 10, 1923
Released on J-STAGE: February 05, 2009

DOIhttps://doi.org/10.2151/jmsj1923.1.1_13

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At Aerodrome of Military Aviation School Tokorozawa Japan, (N35°48' E130°28') pilot balloon observation with single theodlite and with 40 gr balloons were made from January 1921 to Sept. 1922. The author used the results of 81 reliable ascentions and obtaind average wind velocity-as shown in Fig 1-and wind directions-Fig. 2 at this place. The result affirms the prevailance of great westerlies at heights above 1500.m. According to the author's opinion, the height of monsoon in this region is limitted under 1500m. and above which the return current prevailes until 4000m. and thence upward antitrade still has it slight notherly compornent.

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Ice Column on the Frozen Surface of Water in China Basin Observed at Suwa

K. Misawa

1923 Volume 1 Issue 1 Pages 18-19
Published: January 10, 1923
Released on J-STAGE: February 05, 2009

DOIhttps://doi.org/10.2151/jmsj1923.1.1_18

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An ice column was observed on the frozen surface of water on the morning of the 9th December. Its length was about 4cm. and its cross section was an irregular isoceles triangle, the base of which was 2.0cm. and two other sides were 1.5cm. The night was very clear and calm thoughout. The air temperature on the morning was-2.5°c at 7h am. and-4.7°c at 8h am. Total weight of ice in the Basin was about 0.8kg.

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Ice Column on the Frozen Surface of Water Observed at Utsunomiya

H. Sakamoto

1923 Volume 1 Issue 1 Pages 19-21
Published: January 10, 1923
Released on J-STAGE: February 05, 2009

DOIhttps://doi.org/10.2151/jmsj1923.1.1_19

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The author succeeded to make an ice column on the frozen surface of water in the evaporimeter of 20cm, in diameter. He gave a shock to the frozen surface of water in the evaporimeter by tilting it at 10h pm. when the surface of water was covered by thin ice and found ice columns on the frozen surface at 2 o'clock on the next morning, Another ice column were found in a water reservoir of wet bulb thermometer. It was a square column. Its height was 2 bu at 2^h am, and 5 bu at 6^h am. It grew up 0.7 bu per hour (3.3bu=1cm)

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