Understanding of Petobo liquefaction flowslide by 2018.09.28 Palu-Donggala Indonesia earthquake based on site reconnaissance     

Kusumawardani  Rini  Chang  Muhsiung  Upomo  Togani Cahyadi  Huang  Ren-Chung  Fansuri  Muhammad Hamzah  Prayitno  Galih Ady 《Landslides》2021,18(9):3163-3182

Landslides - The Palu-Donggala earthquake struck Palu city of Sulawesi island, Indonesia, on 28 September 2018. A large-scale liquefaction phenomena occurred in some areas which caused massive...  相似文献   

The use of low frequencies in a full‐waveform inversion and impedance inversion land seismic case study     

Guido Baeten  Jan Willem de Maag  René‐Edouard Plessix  Rini Klaassen  Tahira Qureshi  Maren Kleemeyer  Fons ten Kroode  Zhang Rujie 《Geophysical Prospecting》2013,61(4):701-711

Velocity model building and impedance inversion generally suffer from a lack of intermediate wavenumber content in seismic data. Intermediate wavenumbers may be retrieved directly from seismic data sets if enough low frequencies are recorded. Over the past years, improvements in acquisition have allowed us to obtain seismic data with a broader frequency spectrum. To illustrate the benefits of broadband acquisition, notably the recording of low frequencies, we discuss the inversion of land seismic data acquired in Inner Mongolia, China. This data set contains frequencies from 1.5–80 Hz. We show that the velocity estimate based on an acoustic full‐waveform inversion approach is superior to one obtained from reflection traveltime inversion because after full‐waveform inversion the background velocity conforms to geology. We also illustrate the added value of low frequencies in an impedance estimate.  相似文献