They are clearly manipulating the data: M9.5 earthquake in Argentina downgraded to M6.0 before completely disappearing from the maps
M9.5 earthquake downgraded to M6.0 and then M4.7 earthquake by USGS
A powerful M9.5 earthquake hit La Rioja, Argentina at a depth of 649km (403 miles) on September 23, 2021, around 12:18 UTC (or 9:18 local time). At least this is what everyone thought at the beginning…
Just a few minutes later, what would have been one of the most powerful earthquake ever measured on Earth, was deleted by the Chilean Geological Survey:
M9.5 earthquake deleted on September 23, 2021