Potential Volcanic Origin of the 2023 Short-period Tsunami in the Izu Islands, Japan

Authors

DOI:

https://doi.org/10.26443/seismica.v2i2.1160

Keywords:

Tsunami

Abstract

On October 8, 2023, at 21:40 UTC (6:40 on October 9 local time), a tsunami warning was issued for the Izu Islands and southwest Japan. This tsunami was initially considered to be associated with the Mw 4.7 earthquake at 20:25 UTC (5:25 JST). However, we know events of this magnitude are far too small to generate observed tsunamis from coseismic deformation alone. In this study, we analyzed the ocean-bottom pressure records of DONET and S-net, real-time cabled observation networks on the Pacific coast of Japan. We find that the dominant period of this tsunami was relatively short, 250 sec, and that the largest tsunami occurred at 21:13 (6:13 JST) near Sofu-gan volcano. In addition, T waves, or the ocean-acoustic waves, were clearly observed by DONET – we posit these correspond to a vigorous swarm-like seismic event at the same region of the tsunami source. We formally invert for the tsunami source and find that several tsunami sources with an interval of about 4 min are necessary to reproduce the observed records. These most likely correspond to volcanic eruptions.

References

Amante, C., & Eakins, B. W. (2009). ETOPO1 Global Relief Model converted to PanMap layer format. PANGAEA. https://doi.org/10.1594/PANGAEA.769615

Aoi, S., Asano, Y., Kunugi, T., Kimura, T., Uehira, K., Takahashi, N., Ueda, H., Shiomi, K., Matsumoto, T., & Fujiwara, H. (2020). MOWLAS: NIED observation network for earthquake, tsunami and volcano. Earth, Planets and Space, 72(1). https://doi.org/10.1186/s40623-020-01250-x DOI: https://doi.org/10.1186/s40623-020-01250-x

Baba, T., Takahashi, N., Kaneda, Y., Ando, K., Matsuoka, D., & Kato, T. (2015). Parallel Implementation of Dispersive Tsunami Wave Modeling with a Nesting Algorithm for the 2011 Tohoku Tsunami. Pure and Applied Geophysics, 172(12), 3455–3472. https://doi.org/10.1007/s00024-015-1049-2 DOI: https://doi.org/10.1007/s00024-015-1049-2

Chernick, M. R. (2007). Bootstrap Methods: A Guide for Practitioners and Researchers. In Wiley Series in Probability and Statistics. Wiley. https://doi.org/10.1002/9780470192573 DOI: https://doi.org/10.1002/9780470192573

Geological Survey of Japan. (2013). Sofugan, Volcano of Japan. https://gbank.gsj.jp/volcano/Quat_Vol/volcano_data/G19.html

Heidarzadeh, M., & Satake, K. (2014). The El Salvador and Philippines Tsunamis of August 2012: Insights from Sea Level Data Analysis and Numerical Modeling. Pure and Applied Geophysics, 171(12), 3437–3455. https://doi.org/10.1007/s00024-014-0790-2 DOI: https://doi.org/10.1007/s00024-014-0790-2

Hossen, M. J., Cummins, P. R., Dettmer, J., & Baba, T. (2015). Tsunami waveform inversion for sea surface displacement following the 2011 Tohoku earthquake: Importance of dispersion and source kinematics. Journal of Geophysical Research: Solid Earth, 120(9), 6452–6473. https://doi.org/10.1002/2015jb011942 DOI: https://doi.org/10.1002/2015JB011942

Japan Coast Gard. (2023). Press release about suspended solids in the sea around Torishima Island. https://www.kaiho.mlit.go.jp/info/kouhou/r5/k231020_1/k231020_1.pdf

Japan Meteorological Agency (JMA). (2023). Press release about the earthquake near Tori-shima Island at 05:25 on October 9, 2023. https://www.jma.go.jp/jma/press/2310/09b/kaisetsu202310091100.pdf

Kubota, T., Saito, T., Chikasada, N. Y., & Suzuki, W. (2020). Ultrabroadband Seismic and Tsunami Wave Observation of High‐Sampling Ocean‐Bottom Pressure Gauge Covering Periods From Seconds to Hours. Earth and Space Science, 7(10). https://doi.org/10.1029/2020ea001197 DOI: https://doi.org/10.1029/2020EA001197

Mizutani, A., Yomogida, K., & Tanioka, Y. (2020). Early Tsunami Detection With Near‐Fault Ocean‐Bottom Pressure Gauge Records Based on the Comparison With Seismic Data. Journal of Geophysical Research: Oceans, 125(9). https://doi.org/10.1029/2020jc016275 DOI: https://doi.org/10.1029/2020JC016275

National Research Institute for Earth Science and Disaster Resilience (NIED). (2019a). NIED DONET. https://doi.org/10.17598/nied.0008

National Research Institute for Earth Science and Disaster Resilience (NIED). (2019b). NIED S-net. https://doi.org/10.17598/nied.0007

Nosov, M., Karpov, V., Kolesov, S., Sementsov, K., Matsumoto, H., & Kaneda, Y. (2018). Relationship between pressure variations at the ocean bottom and the acceleration of its motion during a submarine earthquake. Earth, Planets and Space, 70(1). https://doi.org/10.1186/s40623-018-0874-9 DOI: https://doi.org/10.1186/s40623-018-0874-9

Saito, T., Satake, K., & Furumura, T. (2010). Tsunami waveform inversion including dispersive waves: the 2004 earthquake off Kii Peninsula, Japan. Journal of Geophysical Research: Solid Earth, 115(B6). https://doi.org/10.1029/2009jb006884 DOI: https://doi.org/10.1029/2009JB006884

Sandanbata, O., Satake, K., Takemura, S., Watada, S., & Maeda, T. (2023). Enigmatic tsunami waves amplified by repetitive source events in the southwest of Torishima Island, Japan. Not Peer-Reviewed Preprint, ESS Open Archive. https://doi.org/10.22541/essoar.169878726.62136311/v1 DOI: https://doi.org/10.22541/essoar.169878726.62136311/v1

Sandanbata, O., Watada, S., Satake, K., Fukao, Y., Sugioka, H., Ito, A., & Shiobara, H. (2017). Ray Tracing for Dispersive Tsunamis and Source Amplitude Estimation Based on Green’s Law: Application to the 2015 Volcanic Tsunami Earthquake Near Torishima, South of Japan. Pure and Applied Geophysics, 175(4), 1371–1385. https://doi.org/10.1007/s00024-017-1746-0 DOI: https://doi.org/10.1007/s00024-017-1746-0

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. https://doi.org/10.1785/0120120122 DOI: https://doi.org/10.1785/0120120122

Sethian, J. A. (1999). Level Set Methods and Fast Marching Methods (2nd ed.). Cambridge Unversity Press. DOI: https://doi.org/10.1137/S0036144598347059

Wessel, P., Luis, J. F., Uieda, L., Scharroo, R., Wobbe, F., Smith, W. H. F., & Tian, D. (2019). The Generic Mapping Tools Version 6. Geochemistry, Geophysics, Geosystems, 20(11), 5556–5564. https://doi.org/10.1029/2019gc008515 DOI: https://doi.org/10.1029/2019GC008515

Downloads

Additional Files

Published

2023-12-25

How to Cite

Mizutani, A., & Melgar, D. (2023). Potential Volcanic Origin of the 2023 Short-period Tsunami in the Izu Islands, Japan. Seismica, 2(2). https://doi.org/10.26443/seismica.v2i2.1160

Issue

Vol. 2 No. 2 (2023)

Section

Fast Reports

License

Copyright (c) 2023 Ayumu Mizutani, Diego Melgar

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Funding data