AWS's availability zones are unlike Google Clouds AZs, as they are physically meaningfully distant.
A geological or technical event near one AWS AZ is highly unlikely to also affect the others of that region, unless the event is regional (heh) in scale. For Google Cloud, the AZs are effectively co-located buildings (or at least, Eemshaven has 3 GC AZ DCs at < 1km distance from each other), making even local disruptions reasonably likely to impact availability for the whole region.
A geological or technical event near one AWS AZ is highly unlikely to also affect the others of that region, unless the event is regional (heh) in scale. For Google Cloud, the AZs are effectively co-located buildings (or at least, Eemshaven has 3 GC AZ DCs at < 1km distance from each other), making even local disruptions reasonably likely to impact availability for the whole region.