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DONET1

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Journal Article
Published: 16 April 2019
Bulletin of the Seismological Society of America (2019) 109 (3): 976-986.
... and Tsunamis (DONET1) seafloor observation network in the Nankai subduction zone. The observed values in peak ground velocity and acceleration response spectra (SA) at periods of 0.5–8 s at seafloor stations were much larger than those predicted by the empirical attenuation relationship. The observed values...
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Journal Article
Published: 27 March 2018
Bulletin of the Seismological Society of America (2018) 108 (3A): 1210-1218.
...Hisahiko Kubo; Takeshi Nakamura; Wataru Suzuki; Takeshi Kimura; Takashi Kunugi; Narumi Takahashi; Shin Aoi Abstract We investigate the site amplification characteristics in the 0.2–10 Hz frequency band at the DONET1 seafloor observation network, which is installed in the Nankai subduction zone...
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Acceleration waveforms observed at <b>DONET1</b> stations during the 2016 southeas...
Published: 16 April 2019
Figure 2. Acceleration waveforms observed at DONET1 stations during the 2016 southeast off‐Mie earthquake. The maximum value for each waveform is shown at the upper right of the waveform. (a) Waveforms normalized by the maximum amplitude of three components for each station and (b) waveforms
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Horizontal‐to‐vertical (H&#x2F;V) spectral ratios of  S  waves for <b>DONET1</b> observ...
Published: 16 April 2019
Figure 6. Horizontal‐to‐vertical (H/V) spectral ratios of S waves for DONET1 observations. Gray dashed lines with gray shadows denote the mean of the H/V spectral ratios of weak motions with the standard deviation of 1 σ . Black lines denote the H/V spectral ratios for the 2016 southeast
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Relationship between horizontal PGA and DNL at <b>DONET1</b> stations. Black and g...
Published: 16 April 2019
Figure 7. Relationship between horizontal PGA and DNL at DONET1 stations. Black and gray circles denote observations during the 2016 southeast off‐Mie earthquake and other earthquakes, respectively. The information on event–station pairs plotted here is listed in Ⓔ Table S2 (available
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Estimated site amplification factors for <b>DONET1</b> and F‐net stations (open ci...
Published: 27 March 2018
Figure 3. Estimated site amplification factors for DONET1 and F‐net stations (open circles). Gray broken lines with shadows denote the geometric means of site amplification factors for DONET1 stations, except KMC10 and KMC11, with the standard deviation of one sigma. Gray solid lines denote
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(a) Comparison of geometric means of site amplification factors for each DO...
Published: 27 March 2018
Figure 4. (a) Comparison of geometric means of site amplification factors for each DONET1 station group. Red, cyan, green, yellow, and violet lines denote the means for groups KMA, KMB, KMC, KMD, and KME, respectively. Note that the site amplification factors at KMC10 and KMC11 are not included
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(a) Distributions of stations and earthquakes used in this study. Dark cyan...
Published: 27 March 2018
Figure 1. (a) Distributions of stations and earthquakes used in this study. Dark cyan triangles denote DONET1 stations installed before 2011, which are used in this study. Green triangles denote F‐net stations, also used in this study. Small light‐cyan triangles denote DONET1 stations installed
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Residuals (    log  10     [observation/prediction]) of (a) horizontal PGA ...
Published: 16 April 2019
denote observations at DONET1, DONET2, and K‐NET/KiK‐net stations, respectively. The predicted values are based on the empirical relations proposed by Morikawa and Fujiwara (2013) for a subduction plate‐boundary earthquake with M w  5.6. The gray zone indicates that the distance is longer than
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Relationship of distance from the trench axis and peak frequency of site am...
Published: 27 March 2018
Figure 5. Relationship of distance from the trench axis and peak frequency of site amplification factors for DONET1 stations. Red, cyan, green, yellow, and violet lines denote the means for groups KMA, KMB, KMC, KMD, and KME, respectively. The distance from the trench axis is calculated along
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(a) Distribution of horizontal peak ground acceleration (PGA) during the 20...
Published: 16 April 2019
Figure 1. (a) Distribution of horizontal peak ground acceleration (PGA) during the 2016 southeast off‐Mie earthquake and (b) an enlarged view of (a) the eastern Dense Oceanfloor Network system for Earthquakes and Tsunamis (DONET1) stations. Circles, reverse triangles, and squares denote DONET1
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Schematic image of underground structure offshore of the Kii Peninsula that...
Published: 27 March 2018
of Okuda et al. (1977 , 1979) and Iwabuchi (1995) . This image corresponds to the cross section of the orange line in Figure  1a,b , in which an ocean‐bottom seismograph survey was conducted in 2004 (NT0405). Broken lines indicate the approximate location of each DONET1 station group. A generalized
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Attenuation relationships of (a) horizontal PGA and (b) horizontal peak gro...
Published: 16 April 2019
earthquake. Circles, reverse triangles, and squares denote observations at DONET1, DONET2, and K‐NET/KiK‐net stations, respectively. The shortest distance from the source fault of the 2016 southeast off‐Mie earthquake to a station is calculated using the fault‐plane model proposed by Wallace et al. (2016
Journal Article
Published: 03 April 2018
Bulletin of the Seismological Society of America (2018) 108 (3A): 1231-1239.
... (NIED) and the Japan Agency for Marine‐Earth Science and Technology (JAMSTEC; Kaneda et al. , 2015 ). DONET1 consists of 20 ocean‐floor stations; each station has three‐component strong‐motion accelerometers, three‐component broadband velocity sensors, pressure gauges, differential pressure gauges...
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