Doppler Frequency Shifts Associated With the 18 September 2022 M6.8 Taitung Earthquake Observed by Local CW-HF Doppler Sounding Systems in Taiwan
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00638497" target="_blank" >RIV/68378289:_____/25:00638497 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JA033876" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JA033876</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2025JA033876" target="_blank" >10.1029/2025JA033876</a>
Alternative languages
Result language
angličtina
Original language name
Doppler Frequency Shifts Associated With the 18 September 2022 M6.8 Taitung Earthquake Observed by Local CW-HF Doppler Sounding Systems in Taiwan
Original language description
Doppler frequency shifts (DFSs) recorded by local continuous wave-high frequency (CW-HF) Doppler sounding systems have been used to study seismo-traveling ionospheric disturbances (STIDs) triggered by seismic waves of M ≥ 5.5 earthquakes in the Taiwan vicinity during 2000–2022. We observed the first significant STID in DFSs induced by the 18 September 2022 M6.8 Taitung earthquake. To investigate this significant STID in more detail, DFSs of five sounding frequencies recorded by a network of nine receiving stations of the CW-HF Doppler sounding systems, together with the total electron content (TEC) derived by 35 ground-based GPS receivers, ionograms, and seismograms, are examined. Results show that horizontal speeds of the significant STID in DFSs of the 6.1 MHz sounding frequency and in TECs are 1.4 and 1.3 km/s, respectively. Upward propagation with a speed of sound of 0.72 km/s is estimated through DFSs of the five sounding frequencies, where the reflection heights are about 160–225 km altitude. We further examine DFSs associated with the top nine earthquakes in the Taiwan vicinity during 2022–2023. Results show that for near field observations, in addition to the earthquake magnitude, the total earthquake intensity plays an important role in triggering significant STIDs.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
130
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
e2025JA033876
UT code for WoS article
001563162800001
EID of the result in the Scopus database
2-s2.0-105014618756