The International Data Centre (IDC) routinely applies event screening using a multi-technology approach in order to enable member states to characterize events as either natural or anthropogenic. Various event discriminants are presented in literature. At the Kenya National Data Centre (KE-NDC or N090), a systematic and step-by-step procedure of SEISMIC events discrimination is applied. Results from the discriminants adopted are obtained within a short time and the discriminants are relatively easy and fast to use. The discriminants used at KE-NDC (N090) are ranked in a hierarchy based on results obtained from one discriminant being applied in subsequent discriminants and ease of returning results within the shortest time possible to allow for events discrimination and dissemination of results. The discriminants applied and their hierarchy at KE-NDC include: (i) event location (epicenter/hypocenter parameters) (ii) hypocenter parameters based on events relocation using HYPOCENTER, (iii) magnitude determination, (iii) m_b:Ms criteria and (iv) focal mechanism determination. Two seismic events are used as case examples to demonstrate how event discrimination is achieved based on the discriminants presented herein. The two seismic events are the 20190324 and 20200503 seismic events in southwestern and northern Kenya respectively. The choice of these two events is based on the fact that they were strong enough to be recorded by a number of global seismic stations and their magnitudes are comparable to the 2009, 2013 and 2016, but slightly lower than the 20,170,903, DPRK announced tests. Based on the discriminants used and presented herein, the two seismic events were categorized as being due to natural earthquakes.

国际数据中心 (IDC) 通常使用多种技术方法进行事件筛选，以使成员国能够将事件定性为自然事件或人为事件。文献中提出了各种事件判别式。肯尼亚国家数据中心（KE-NDC 或 N090）采用系统化、分步的地震事件判别程序。所采用的判别式可以在短时间内得到结果，并且判别式使用起来相对容易和快速。 KE-NDC (N090) 使用的判别式根据在后续判别式中应用一个判别式获得的结果以及在尽可能短的时间内返回结果的难易程度按层次结构进行排序，以允许事件判别和结果传播。 KE-NDC 中应用的判别式及其层次结构包括：(i) 事件位置（震中/震源参数）(ii) 基于使用震源重定位的震源参数，(iii) 震级确定，(iii) m b :Ms_标准和(iv) 震源机制确定。使用两个地震事件作为案例来演示如何基于本文提出的判别式来实现事件判别。这两次地震分别是肯尼亚西南部和北部的20190324和20200503地震。选择这两次事件的依据是，它们的强度足以被全球多个地震台记录到，其震级与2009年、2013年和2016年相当，但略低于朝鲜宣布的20,170,903次测试。根据本文使用和提出的判别式，这两次地震事件被归类为自然地震所致。