| Budget Amount *help |
¥42,380,000 (Direct Cost: ¥32,600,000、Indirect Cost: ¥9,780,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Fiscal Year 2015: ¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
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| Outline of Final Research Achievements |
For breakthrough of the broadband ocean bottom seismology, which has been established in these 20 years by us, we have performed to develop an autonomous type self-burial sensor ocean bottom broadband seismometer (BBOBS) named "NX-2G". It is a mixture of the self-popup type BBOBS and the self-burial sensor type, "BBOBS-NX", operated with a submersible. The BBOBS has been used in several observations with many kinds of vessels. But the data quality is better with the BBOBS-NX, which limits chance of observation due to use of a submersible.
The NX-2G has been almost realized during test observations in its autonomous functions planed. But the noise reduction was not as expected in results by BBOBS-NXs. We have modified the NX-2G for the next test, but the cruise in 2019 was canceled due to typhoons. The next chance will be in 2021.
Results of this research have been presented in several meetings (IUGG, AGU, JpGU, and SSJ), and a review paper including this research has been accepted.
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