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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Sequence of deep-focus earthquakes beneath the Bonin Islands identified by the NIED nationwide dense seismic networks Hi-net and F-net

Fig. 4

MS envelopes for frequencies of 1–32 Hz at N.OSWF for earthquakes with Mw larger than or equal to 6. The Mw 6.5 earthquake used in this study and the deeper (~680 km) Mw 7.9 earthquake are indicated in red and green, respectively. Station N.OSWF has been operated since March 2, 2002 (http://www.fnet.bosai.go.jp/st_info/?_c=OSW&LANG=en)

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