from ABC News:
A mysterious ripple of seismic waves has travelled thousands of kilometres across the globe, tripping sensors throughout Africa, Canada, New Zealand, and Hawaii, seemingly without being felt by a single person.
- Seismic waves beginning off the coast of Mozambique triggered sensors in Kenya, Chile, New Zealand and Canada
- The tremors lasted more than 20 minutes
- The earthquake went unnoticed until it was picked up by an earthquake enthusiast online
The tremors started just off the shores of Mayotte, a French archipelago in the Indian Ocean between Madagascar and Africa, and would have flown under the radar if not for an earthquake enthusiast in New Zealand who had been tuned in to the US Geological Survey’s real-time seismogram displays online.