gold, page-117807

My chart "6.5 years of US$ gold price NY weekly close saved from ***** (red) with weekly change(Blue) in $ right axis to 17Mar23"posted to show HotCopper people the curiosity of how the weekly price change (blue trace) resembles an earthquake signal -
a seismogram from a seismometer.
The years up to "the ides of March 2020" are clearly characterized by smaller weekly gold price movements then some sort of earthquake caused the flurry of big weekly changes around the Ides of March 2020 -
then after March2020 weekly changes remained in a broader band than pre Ides of March 2020.
What do readers think caused the March 2020 changes?
Could it be a big market player changed their trading activity?
My price data saved from kay-eye-tea-sea-Oh