Hunga Tonga-Hunga Ha'apai volcano (Tonga): dangerous eruption with huge ash cloud up to 20 km triggered tsunami, evacuations ordered

The high-level explosive activity at the volcano continues.
A massive and very dangerous explosion occurred at 04:00 UTC today and even several times stronger than the previous powerful eruptions.
The massive eruption, captured and seen by satellites Himawari-8 and GOES-West, generated an impressive eruption column sending a pyroclastic material up to 20 km altitude! and sent big shockwaves traveling along vast stretches in the Pacific. NIWA's (National Institute of Water and Atmospheric Research) climate stations from New Zealand recorded a short air pressure increase as atmospheric shock waves pulsed across the country. The people alerted that the eruption was heard 1,300 miles away from the eruption site.
The eruption triggered a tsunami that has impacted the south of Tonga by 1.2 meters of waves. The Fijian government warned of waves as high as 3 meters including Vanuatu and other Pacific islands issued similar warnings. People have been evacuated from coastal areas and more evacuations are now in progress.

UPDATE: The eruption plume reached the stratosphere level (approx. 30 km).
Source of annotated satellite image: Windy.com, Satellite

The eruption seen from outer space captured by Himawari-8 satellite

Hunga #Tonga-Hunga Ha'apai #eruption at 04:00 UTC on Jan 15. images courtesy #Himawari8 pic.twitter.com/Zk8uepybuX

— Seán Doran (@_TheSeaning) January 15, 2022

The eruption seen from outer space captured by Himawari-8 satellite

1.14.2021: Large volcanic eruption near Tonga (Hunga Tonga-Hunga Ha'apai volcano) today as seen from outer space. Shown on visible imagery using the Himawari satellite. #hiwx #tsunami #earthquake pic.twitter.com/zOTj6Qu1Wv

— NWSHonolulu (@NWSHonolulu) January 15, 2022

The eruption seen from outer space captured by Himawari-8 satellite

The violent eruption a few hours ago of the Hunga Tonga-Hunga Haʻapai volcano captured by satellites GOES-West and Himawari-8. pic.twitter.com/PzV5v9apF6

— Wonder of Science (@wonderofscience) January 15, 2022

The tsunami hit Tonga coasts triggered by the large explosion today (source: @JTuisinu/twitter)

Tsunami videos out of Tonga this afternoon following the Volcano Eruption. pic.twitter.com/JTIcEdbpGe

— Jese Tuisinu (@JTuisinu) January 15, 2022

1.2 meters high waves hit Tonga coasts triggered by the large explosion today (source:@sakakimoana/twitter)

Stay safe everyone pic.twitter.com/OhrrxJmXAW

— Dr Faka'iloatonga Taumoefolau (@sakakimoana) January 15, 2022

Impressive sonic boom heard 800 kilometers away from the eruption (source: @portiajessene/twitter)

Tonga Volcano eruption heard from Lakeba, Fiji#TongaVolcano pic.twitter.com/qc9ISL25QX

— Portia Dugu (@portiajessene) January 15, 2022