The eruption of the Hunga Tonga-Hunga Ha'apai volcano affected the nearby capital and even produced thunder far away when it started activity just shortly, causing a tsunami alert.
Top ten natural disasters in history are the worst that can be recalled. Prior to this, many events have impacted humans but there are no account due to no recorded sources.
If a simultaneous eruption of dormant Antarctic volcanoes happen, it would cause drastic change or extinction but its good thing nature takes thousands of years to that.