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The 2018 Hokkaido Eastern Iburi Earthquake and Hidaka arc-arc collision system

The 2018 Mw 6.6 Hokkaido Eastern Iburi Earthquake generated strong ground shaking of JMA maximum intensity 7 and induced fatal landslides. The earthquake occurred beneath inland Hokkaido with an unusual deep hypocenter depth of 35km, possibly reflecting complex crustal and mantle structure of Hidaka arc-arc collision system. Connection of the earthquake with its nearby major active faults is still not very clear so far. Strong ground motion evaluation strategy of deep crustal earthquake is future challenge. This special issue will focus on multidisciplinary geoscientific researches by seismology, geodesy, electromagnetic and landslide study regarding this earthquake and associated phenomena.

Edited by Hiroaki Takahashi, Nobuo Takai, Masahiro Chigira, Guojie Meng, Saeko Kita and Takuji Yamada

  1. Content type: Full paper

    This study examined the frequency-size distribution of 6117 landslides spread over 440 km2 in Iburi Subprefecture, Hokkaido, Japan, induced by the Hokkaido Eastern Iburi Earthquake (Mw 6.6) on September 6, 2018. ...

    Authors: Mio Kasai and Takashi Yamada

    Citation: Earth, Planets and Space 2019 71:89

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  2. Content type: Express Letter

    The present location of the tectonic boundary and the convergence rate between the Amur and Okhotsk plates in northern Hokkaido, Japan, were herein estimated from the velocity field using data from a continuou...

    Authors: Chihiro Ito, Hiroaki Takahashi and Mako Ohzono

    Citation: Earth, Planets and Space 2019 71:86

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  3. Content type: Full paper

    Autocorrelation analysis using ambient noise is a useful method to detect temporal changes in wave velocity and scattering property. In this study, we investigated the temporal changes in seismic wave velocity...

    Authors: Hiroki Ikeda and Ryota Takagi

    Citation: Earth, Planets and Space 2019 71:72

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  4. Content type: Full paper

    We investigated the cause of destructive ground motion during the 2018 Hokkaido eastern Iburi earthquake. We conducted strong motion observations of aftershocks and microtremors and the surface wave method in ...

    Authors: Nobuo Takai, Michiko Shigefuji, Jun Horita, Shingo Nomoto, Takahiro Maeda, Masayoshi Ichiyanagi, Hiroaki Takahashi, Hiroaki Yamanaka, Kosuke Chimoto, Seiji Tsuno, Masahiro Korenaga and Nobuyuki Yamada

    Citation: Earth, Planets and Space 2019 71:67

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  5. Content type: Express Letter

    The 2018 Hokkaido Iburi-Tobu earthquake occurred on September 6. In this earthquake, seismic intensity 7 was measured at Shikanuma, Atsuma Town, and severe damage occurred in Hokkaido. The strong motions were ...

    Authors: Kenichi Nakano and Hiroshi Kawase

    Citation: Earth, Planets and Space 2019 71:66

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  6. Content type: Full paper

    We identified and analyzed surface displacements associated with the 2018 Hokkaido Eastern Iburi Earthquake in northern Japan using satellite radar interferograms from the Advanced Land Observing Satellite 2. ...

    Authors: Satoshi Fujiwara, Takayuki Nakano, Yu Morishita, Tomokazu Kobayashi, Hiroshi Yarai, Hiroshi Une and Kyonosuke Hayashi

    Citation: Earth, Planets and Space 2019 71:64

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  7. Content type: Full paper

    The source rupture process of the 2018 Hokkaido Eastern Iburi earthquake was investigated by performing a joint inversion analysis using the strong motion and geodetic data. A fault model that consists of two ...

    Authors: Hiroaki Kobayashi, Kazuki Koketsu and Hiroe Miyake

    Citation: Earth, Planets and Space 2019 71:63

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  8. Content type: Express Letter

    By applying the InSAR method to ALOS-2 SAR data acquired before and after the 2018 Hokkaido Eastern Iburi earthquake, the ground displacement fields were successfully mapped. Ground deformation is distributed ...

    Authors: Tomokazu Kobayashi, Kyonosuke Hayashi and Hiroshi Yarai

    Citation: Earth, Planets and Space 2019 71:62

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  9. Content type: Full paper

    The 2018 Mj 6.7 Hokkaido Eastern Iburi earthquake (Iburi earthquake) occurred near the eastern boundary fault zone of the Ishikari lowlands, which is composed of a northern and southern fault. Aftershock distribu...

    Authors: Makiko Ohtani and Kazutoshi Imanishi

    Citation: Earth, Planets and Space 2019 71:57

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  10. Content type: Full paper

    The observed peak ground accelerations and peak ground velocities (PGVs) of the 2018 Mw 6.6 Hokkaido eastern Iburi earthquake generally followed the median values from ground motion prediction equations with r...

    Authors: Yadab P. Dhakal, Takashi Kunugi, Takeshi Kimura, Wataru Suzuki and Shin Aoi

    Citation: Earth, Planets and Space 2019 71:56

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  11. Content type: Express Letter

    The Hokkaido Eastern Iburi earthquake (MJMA = 6.7) occurred on September 6, 2018, in the Hokkaido corner region where the Kurile and northeastern Japan island arcs meet. We relocated aftershocks of this intraplat...

    Authors: Kei Katsumata, Masayoshi Ichiyanagi, Mako Ohzono, Hiroshi Aoyama, Ryo Tanaka, Masamitsu Takada, Teruhiro Yamaguchi, Kazumi Okada, Hiroaki Takahashi, Shin’ichi Sakai, Satoshi Matsumoto, Tomomi Okada, Toru Matsuzawa, Shuichiro Hirano, Toshiko Terakawa, Shinichiro Horikawa…

    Citation: Earth, Planets and Space 2019 71:53

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  12. Content type: Express Letter

    Based on analyses of global navigation satellite system data since 1996, we investigate the spatiotemporal strain field around the Ishikari-Teichi-Toen fault zone, which is a major active fault zone close to t...

    Authors: Mako Ohzono, Hiroaki Takahashi and Chihiro Ito

    Citation: Earth, Planets and Space 2019 71:50

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