Central Department of Physics, Tribhuvan University, Kirtipur, Kathmandu, Nepal.
Birendra Multiple Campus, Tribhuvan University, Bharatpur, Chitwan, Nepal.
PLoS One. 2023 Aug 9;18(8):e0289673. doi: 10.1371/journal.pone.0289673. eCollection 2023.
An earthquake of magnitude 5.6 mb (6.6 ML) hit western Nepal (Doti region) in the wee hours of wednesday morning local time (2:12 AM, 2022.11.08) killing at least six people. Gutenberg-Richter b-value of earthquake distribution and correlation fractal dimension (D2) are estimated for 493 earthquakes with magnitude of completeness 3.6 prior to this earthquake. We consider earthquakes in western Nepal Himalaya and adjoining region (80.0-83.5°E and 27.3-30.5°N) for the period of 1964 to 2022 for the analysis. The b-value 0.68±0.03 implies a high stress zone and the spatial correlation dimension 1.81±0.02 implies a highly heterogeneous region where the epicenters are spatially distributed. Low b-values and high D2 values identify the study region as a high hazard zone. Focal mechanism styles and low b-values correlate with thrust nature of earthquakes and show that the earthquake's occurrence is associated with the dynamics of the faults responsible for generating the past earthquakes.
当地时间周三凌晨（2022 年 11 月 8 日 2:12 时），一场 5.6 级 mb（6.6 ML）地震袭击尼泊尔西部（多蒂地区），造成至少 6 人死亡。在此次地震之前，我们对 493 次震级为 3.6 的完整地震进行了地震分布的古登堡-里希特 b 值和相关分形维数（D2）的估计。我们考虑了 1964 年至 2022 年期间尼泊尔西部喜马拉雅山及毗邻地区（80.0-83.5°E 和 27.3-30.5°N）的地震。b 值为 0.68±0.03，表明这是一个高应力区，空间相关维数为 1.81±0.02，表明这是一个高度不均匀的地区，震中在空间上分布。低 b 值和高 D2 值表明研究区域是一个高危险区。震源机制类型和低 b 值与地震的逆冲性质相关，表明地震的发生与断层的动力学有关，而断层的动力学是导致过去地震发生的原因。
