07/09/0869 | 869 Jogan Earthquake


THe 869 Jogan earthquake which was located offshore Eastern Honshu is considered the historic predecessor of the 2011 Tohoku earthquake. Many deposits along the Miyagi coast associated with the tsunami following this earthquake have been considered very similar to those from 2011. However, this does not hold up for potential deposits on the Sanriku coast which limits is size to be slightly smaller than 2011 and its effects similar to but more focus around the Sendai plain.

There is still discussion around its exact moment magnitude.

Events in the same region
Date Title Region Preferred Magnitude Quality*
0869 Jul 09th 869 Jogan Earthquake Honshu 8.8 C
1454 1454 Honshu Earthquake Honshu 8.4 C
1677 Nov 04th 1677 Kanto Earthquake Honshu 8.4 C
1793 Feb 17th, 14:53 1793 Miyagi Earthquake Honshu 8.2 B
2011 Mar 11th, 06:46 2011 Tohoku Earthquake Honshu 9.1 A
  • Satake (2015) -Satake, Kenji. "Geological and historical evidence of irregular recurrent earthquakes in Japan." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373.2053 (2015): 20140375. - Link
  • Namegaya & Satake (2014) -Namegaya, Y., & Satake, K. (2014). Reexamination of the AD 869 Jogan earthquake size from tsunami deposit distribution, simulated flow depth, and velocity. Geophysical Research Letters, 41(7), 2297-2303. - Link
  • Satake et al. (2013) -Satake, K., Fujii, Y., Harada, T., & Namegaya, Y. (2013). Time and space distribution of coseismic slip of the 2011 Tohoku earthquake as inferred from tsunami waveform data. Bulletin of the seismological society of America, 103(2B), 1473-1492. - Link
  • Sugawara et al. (2012) -Sugawara, D., Goto, K., Imamura, F., Matsumoto, H., & Minoura, K. (2012). Assessing the magnitude of the 869 Jogan tsunami using sedimentary deposits: Prediction and consequence of the 2011 Tohoku-oki tsunami. Sedimentary Geology, 282, 14-26. - Link
  • NGDC - - Link
  • Utsu (2002) -Utsu, T., 2002, A list of deadly earthquakes in the World: 1500-2000, in International Handbook of Earthquake and Engineering Seismology Part A, edited by Lee, W.K., Kanamori, H., Jennings, P.C., and Kisslinger, C., pp. 691-717, Academic Press, San Diego. - Link
Event Characteristics
Preferred Magnitude 8.80 (8.30-9.00)
Epicenter 38.500°N, 143.800°E
Depth unknown
Tsunami yes
Paleo-Event no
Quality of Evidence C

Magnitude Range
Year Reference Magnitude
2015 Satake (2015) 8.4
2014 Namegaya & Satake (2014) 8.8 (8.6-9)
2013 Satake et al. (2013) 8.9 (8.8-9)
2012 Sugawara et al. (2012) 8.4
2010 NGDC 8.6
2002 Utsu (2002) 8.3

This table lists some of the most relevant publications in estimating the moment magnitude of this earthquake. If you think there are other important or new publications, please get in contact.