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Magnitude 4.8 Quake Near Wyalkatchem Is Strongest in Yearlong Wheatbelt Sequence

Authorities are compiling public reports of the tremor to refine ground-shaking maps for emergency planning.

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Overview

  • The earthquake struck just after 2 am AWST on July 29 at a shallow depth of about 1 km roughly 30 km south-east of Wyalkatchem in Western Australia’s Wheatbelt.
  • With over 130 tremors recorded in the past year, this 4.8-magnitude event surpasses the previous 4.5 as the largest in the ongoing seismic sequence.
  • Shaking was widely felt across south-western WA, including in Perth and as far away as Kalgoorlie, prompting hundreds of residents to log felt reports.
  • No damage or injuries have been reported, though locals described strong rattling sensations and brief alarm when the quake hit during the night.
  • Seven aftershocks have been detected and officials are urging continued public reporting to improve shaking-intensity maps and bolster emergency preparedness.