This paper presents findings from a low-cost seismic network deployed in the Chiang Mai Basin, Thailand, which recorded the 28 March 2025 Mw 7.7 Myanmar earthquake. The study combines microtremor array analysis, ground motion recordings, and site response modeling to characterize seismic amplification in the basin. Authors: Amorntep Jirasakjamroonsri, Nakhorn Poovarodom, Auttapinya Apakarin, Pakkapong Likhitsuwan (Thammasat University). Presented at TSER2025 Symposium, Bangkok, August 2025.