The Northeast of Thailand is defined as a low seismic hazard region. However, earthquakes were reported and felt by local people around 25 years ago. Using probabilistic seismic hazard analysis (PSHA), this research evaluates the seismic hazard in the Northeast region of Thailand to be the database for seismic design. The seismic hazard is expressed in the term of peak ground acceleration (PGA) at base rock level. The crustal faults and earthquake events are considered as the seismic source in this evaluation. Two crustal faults are evaluated in Thakhaek fault and Phetchabun fault, which have not been considered before in PSHA. Earthquake events are classified into two types: background seismicity zones and subduction zones. The results reveal that the highest peak ground acceleration at base rock level is in Bueng Kan province and Nakhon Phanom province. The evaluated seismic hazard in the Northeast region is approximately 30% g and 12% g with a return period of 2,475 years and 475 years, respectively. Results obtained from this study are about two times higher than the Earthquake Resistant Design code 1302 of Thailand. The evaluated seismic hazard is higher than the peak ground accelerations that can cause damage to building structures (>3.9% g).

泰国东北被定义为地震危险程度较低的地区。但是，大约25年前，当地人报告并感受到了地震。本研究使用概率地震危险性分析（PSHA），将泰国东北地区的地震危险性评估为地震设计数据库。地震危险用基岩水平的峰值地面加速度（PGA）表示。在此评估中，地壳断层和地震事件被视为地震源。在Thakhaek断层和Phetchabun断层中评估了两个地壳断层，这在PSHA中未曾考虑过。地震事件分为两种类型：背景地震活动带和俯冲带。结果表明，在基本岩石水平上最高的地面加速度峰值发生在Bueng Kan省和Nakhon Phanom省。评估的东北地区地震危险性约为30％g和12％g，回归期分别为2475年和475年。这项研究获得的结果比泰国的抗震设计规范1302高出大约两倍。评估的地震危险性高于可能导致建筑结构损坏的峰值地面加速度（> 3.9％g）。