Magnitude of the 23 January 2018 <i>M</i>7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska

Chen Song; Qiang Yao; Dun Wang

doi:10.1007/s12583-019-1215-z

Volume 30 Issue 5

Oct 2019

Turn off MathJax

Article Contents

Journal of Earth Science > 2019 > 30(5): 1005-1009.

Chen Song, Qiang Yao, Dun Wang. Magnitude of the 23 January 2018 M7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska. Journal of Earth Science, 2019, 30(5): 1005-1009. doi: 10.1007/s12583-019-1215-z

Citation:

Chen Song, Qiang Yao, Dun Wang. Magnitude of the 23 January 2018 M7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska. Journal of Earth Science, 2019, 30(5): 1005-1009. doi: 10.1007/s12583-019-1215-z

Citation:

PDF( 1493 KB)

Magnitude of the 23 January 2018 M7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska

doi: 10.1007/s12583-019-1215-z

Chen Song^1,2,
Qiang Yao²,
Dun Wang^{2
,
,}

1.
Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences, China University of Geosciences, Wuhan 430074, China

More Information

Corresponding author: Dun Wang
Received Date: 29 Sep 2018
Accepted Date: 01 Mar 2019
Publish Date: 01 Oct 2019

Abstract

Abstract

We apply a novel method to estimate the magnitude of the 23 January 2018 M7.9 Alaska earthquake using seismic stations recorded at local to regional distances in Alaska, US. We determine the source duration from back-projection results derived from the Alaska stations in a relatively compact azimuth range. Then we calculate the maximum P-wave displacements recorded on a wide azimuth range at distances of 8 to 15 degrees. Combining the source duration and the maximum P-wave displacements, we obtain magnitudes of 7.86-8.03 for the 23 January 2018 earthquake in 3-5 min, very close to the M_w7.9 determined by the USGS and GCMT. This example validates the new approach for determining magnitude of large earthquakes using local to regional stations, and its time efficiency that magnitudes of large earthquakes can be accurately estimated within in 3-5 min after origin time. Therefore, further application of this new method would help accurate estimation of size of earthquakes that occur offshore and might cause tsunami hazards.
- rapid magnitude estimation,
- back-projection,
- real-time seismology,
- tsunami warning,
- geophysics

FullText(HTML)

References(23)

References

Convers, J. A., Newman, A. V., 2013. Rapid Earthquake Rupture Duration Estimates from Teleseismic Energy Rates, with Application to Real-Time Warning. Geophysical Research Letters, 40(22): 5844-5848. https://doi.org/10.1002/2013gl057664

Crotwell, H. P., Owens, T. J., Ritsema, J., 1999. The TauP Toolkit: Flexible Seismic Travel-Time and Ray-Path Utilities. Seismological Research Letters, 70(2): 154-160. https://doi.org/10.1785/gssrl.70.2.154

Ekström, G., Stein, R. S., Eaton, J. P., et al., 1992. Seismicity and Geometry of a 110-km-Long Blind Thrust Fault 1. The 1985 Kettleman Hills, California, Earthquake. Journal of Geophysical Research, 97(B4): 4843. https://doi.org/10.1029/91jb02925

Fan, W. Y., Shearer, P. M., 2015. Detailed Rupture Imaging of the 25 April 2015 Nepal Earthquake Using Teleseismic Waves. Geophysical Research Letters, 42(14): 5744-5752. https://doi.org/10.1002/2015gl064587

Freymueller, J. T., Woodard, H., Cohen, S. C., et al., 2008. Active Deformation Processes in Alaska, Based on 15 Years of GPS Measurements. In: Freymueller, J. T., Haeussler, P. J., Wesson, R. L., et al., eds., Active Tectonics and Seismic Potential of Alaska, Geophys. Monogr. Ser., 179: 1-42. https://doi.org/10.1029/179gm02

Hanks, T. C., Kanamori, H., 1979. A Moment Magnitude Scale. Journal of Geophysical Research, 84(B5): 2348. https://doi.org/10.1029/jb084ib05p02348

Hara, T., 2007a. Magnitude Determination Using Duration of High Frequency Energy Radiation and Displacement Amplitude: Application to Tsunami Earthquakes. Earth, Planets and Space, 59(6): 561-565. https://doi.org/10.1186/bf03352718

Hara, T., 2007b. Measurement of the Duration of High-Frequency Energy Radiation and Its Application to Determination of the Magnitudes of Large Shallow Earthquakes. Earth, Planets and Space, 59(4): 227-231. https://doi.org/10.1186/bf03353099

Hara, T., 2011. Magnitude Determination Using Duration of High Frequency Energy Radiation and Displacement Amplitude: Application to the 2011 off the Pacific Coast of Tohoku Earthquake. Earth, Planets and Space, 63(7): 525-528. https://doi.org/10.5047/eps.2011.05.014

Ishii, M., Shearer, P. M., Houston, H., et al., 2005. Extent, Duration and Speed of the 2004 Sumatra-Andaman Earthquake Imaged by the Hi-Net Array. Nature, 435(7044): 933-936. https://doi.org/10.1038/nature03675

Kennett, B. L. N., Engdahl, E. R., 1991. Traveltimes for Global Earthquake Location and Phase Identification. Geophysical Journal International, 105(2): 429-465. https://doi.org/10.1111/j.1365-246x.1991.tb06724.x

Krüger, F., Ohrnberger, M., 2005. Tracking the Rupture of the M_w=9.3 Sumatra Earthquake over 1 150 km at Teleseismic Distance. Nature, 435(7044): 937-939. https://doi.org/10.1038/nature03696

Li, J., Liu, C. L., Zheng, Y., et al., 2017. Rupture Process of the M_s 7.0 Lushan Earthquake Determined by Joint Inversion of Local Static GPS Records, Strong Motion Data, and Teleseismograms. Journal of Earth Science, 28(2): 404-410. https://doi.org/10.1007/s12583-017-0757-1

Naugler, F. P., Wageman, J. M., 1973. Gulf of Alaska: Magnetic Anomalies, Fracture Zones, and Plate Interaction. Geological Society of America Bulletin, 84(5): 815-821. https://doi.org/10.1130/0016-7606(1973)84<L1575:goamaf>2.0.co; 2 doi: 10.1130/0016-7606(1973)842.0.co;2

Pegler, G., Das, S., 1996. The 1987-1992 Gulf of Alaska Earthquakes. Tectonophysics, 257(2-4): 111-136. https://doi.org/10.1016/0040-1951(95)00112-3

Pitman, W. C. Ⅲ, Hayes, D. E., 1968. Sea-Floor Spreading in the Gulf of Alaska. Journal of Geophysical Research, 73(20): 6571-6580. https://doi.org/10.1029/jb073i020p06571

Rao, G., Cheng, Y. L., Lin, A. M., et al., 2017. Relationship between Landslides and Active Normal Faulting in the Epicentral Area of the AD 1556 M~8.5 Huaxian Earthquake, SE Weihe Graben (Central China). Journal of Earth Science, 28(3): 545-554. https://doi.org/10.1007/s12583-017-0900-z

Satriano, C., Kiraly, E., Bernard, P., et al., 2012. The 2012 M_w 8.6 Sumatra Earthquake: Evidence of Westward Sequential Seismic Ruptures Associated to the Reactivation of a N-S Ocean Fabric. Geophysical Research Letters, 39(15): L15302. https://doi.org/10.1029/2012gl052387

Wang, D., Kawakatsu, H., Zhuang, J., et al., 2017. Automated Determination of Magnitude and Source Length of Large Earthquakes Using Backprojection and P Wave Amplitudes. Geophysical Research Letters, 44(11): 5447-5456. https://doi.org/10.1002/2017gl073801

Wang, D., Kawakatsu, H., Mori, J., et al., 2016. Backprojection Analyses from Four Regional Arrays for Rupture over a Curved Dipping Fault: The M_w 7.7 24 September 2013 Pakistan Earthquake. Journal of Geophysical Research: Solid Earth, 121(3): 1948-1961. https://doi.org/10.1002/2015jb012168

Wessel, P., Smith, W. H. F., 1991. Free Software Helps Map and Display Data. Eos, Transactions American Geophysical Union, 72(41): 441-446. https://doi.org/10.1029/90eo00319

Yao, H., Shearer, P. M., Gerstoft, P., 2013. Compressive Sensing of Frequency-Dependent Seismic Radiation from Subduction Zone Megathrust Ruptures. Proceedings of the National Academy of Sciences, 110(12): 4512-4517. https://doi.org/10.1073/pnas.1212790110

Zhang, H., Ge, Z. X., Ding, L. Y., 2011. Three Sub-Events Composing the 2011 off the Pacific Coast of Tohoku Earthquake (M_w 9.0) Inferred from Rupture Imaging by Back-Projecting Teleseismic P Waves. Earth, Planets and Space, 63(7): 595-598. https://doi.org/10.5047/eps.2011.06.021

Relative Articles

Supplements(0)

Cited By

Proportional views

Proportional views

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Figures(5)

Get Citation

PDF

XML

Article Metrics

Article views(451) PDF downloads(12)

Magnitude of the 23 January 2018 M7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska

doi: 10.1007/s12583-019-1215-z

Abstract

References

Proportional views

Catalog

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related

Magnitude of the 23 January 2018 M7.9 Alaska Earthquake Estimated from Local Dense Seismic Records in Alaska

doi: 10.1007/s12583-019-1215-z

Abstract

References

Proportional views

Catalog

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Proportional views

Related

Export File

Citation

Format

Content