The hypocenter list of repeating earthquakes and other numerical data on small earthquake and slow earthquakes around Tohoku, Japan.
Please cite the reference papers correctly when you use these data.
-> Plate model etc. are here / Rupture areas of large earthquakes etc. are here.

* List of repeating earthquakes (Tohoku)


Repeating earthquake catalogue 1984-2011 EPSL2013.txt [386 KB]

(Repeating earthqukuakes selected based on the similarity of their waveforms.)

Reference: Uchida, N., and T. Matsuzawa, Pre- and post-seismic slow slip surrounding the 2011 Tohoku-oki earthquake rupture, Earth Planet. Sci. Lett., 374, 81-91, doi:10.1016/j.epsl.2013.05.021, 2013

* List of repeating earthquakes (SW Japan)


Repeating earthquake catalogue 2002-2015 EPSL2020.txt [33 KB]

(Other slow earthquake data can be found at Slow earthquake database

Reference: Uchida, N., R. Takagi, Y. Asano, and K. Obara, Migration of shallow and deep slow earthquakes toward the locked segment of the Nankai megathrust, Earth and Planetary Science Letters, 531, 115986, 10.1016/j.epsl.2019.115986, 2020.

* Mechanism type of earthquakes classfied by using waveform similarity


Earthquake list for each machanism type (1984-2013) hypo-mecha.tar.gz [341 KB]

Relocated hypocenter with the information of mechanism type (2005-2012) Nakamura-reloc.txt [700 KB]

Reference: Nakamura, W., N. Uchida, and T. Matsuzawa, Spatial distribution of the faulting types of small earthquakes around the 2011 Tohoku-oki earthquake: A comprehensive search using template events, J. Geophys. Res., 121, doi:10.1002/2015JB012584, 2016.

* List of tremors, earthquake swarms, vely low frequency earthquakes and repeating earthquakes


Catalogue [508 KB] (Courtesy of Tomoaki Nishikawa)

(Other earthquake swarm data can be found at Tomoaki Nishikawa's Home Page.)

Reference: Nishikawa, T., T. Matsuzawa, K. Ohta, N. Uchida, T. Nishimura, and S. Ide, The slow earthquake spectrum in the Japan Trench illuminated by the S-net seafloor observatories, Science, 365, 808-813, doi:doi:10.1126/science.aax5618, 2019.

* List of very low frequency earthquakes


catalogue Baba2020_jgr-sup.txt [1.2 MB] (Courtesy of Satoru Baba)

Reference: Baba, S., A. Takeo, K. Obara, T. Matsuzawa, and T. Maeda, Comprehensive detection of very low frequency earthquakes off the Hokkaido and Tohoku Pacific coasts, Northeastern Japan. Journal of Geophysical Research: Solid Earth, 125, e2019JB017988. doi:10.1029/2019JB017988, 2020.

* Conversion table of S-net instruments from X, Y, Z to EW, NS, UD


Conversion Table SRL_Table_S2.csv [11 KB] (Courtesy of Ryota Takagi)

(The E, N, U compornents can be calcurated by E = R11 X + R12 Y + R13 Z, N = R21 X + R22 Y + R23 Z, U = R31 X + R32 Y + R33 Z)

Reference: Takagi, R., N. Uchida, T. Nakayama, R. Azuma, A. Ishigami, T. Okada, T. Nakamura, and K. Shiomi, Estimation of the Orientations of the S‐net Cabled Ocean‐Bottom Sensors, Seismological Research Letters, 90(6), 2175-2187, doi:10.1785/0220190093, 2019.