North Korea has posted photographs purporting to depict the test-firing of its largest missile in recent years.

The country has launched on Sunday an intermediate-range Hwasong-12 missile, marking its most powerful test since late 2017, KCNA reported.

The ballistic missile was estimated to have reached a maximum altitude of 2,000 kilometers and flown for half an hour at a speed of 800 kilometers, according to South Korean reports. 

Hwasong-12

Pyongyang last tested a missile like this in 2017, when the Hwasong-12 flew 787 kilometers at an apogee of just over 2,111 kilometers.

Analysts estimated at the time that the missile could have flown around 4,500 km if launched on a range-maximizing ballistic trajectory, putting the US territory of Guam within range.

Hirokazu Matsuno, Japan's top government spokesman, said on Sunday that the ballistic missile was "intermediate-range or longer-range."

US ready to negotiate with Pyongyang: Pentagon

Following North Korea's latest missile launches, Pentagon Spokesperson John Kirby said that the US is ready to negotiate with Pyongyang, but will continue to build up its military capability in the region to protect itself and its allies.

Kirby told Fox News that "the other thing is, we got to make sure that the ally on the Korean Peninsula is strong. We remain committed to a denuclearized Korean Peninsula. We remain committed to a lot of talks with Pyongyang. We're willing to sit down without precondition to have those kinds of dialogues."

Furthermore, he noted that Washington also wants to be "militarily ready" in the region in response to North Korea's continued missile launches.

Previous launches

Pyongyang has conducted two hypersonic missile tests this month, as well as four short-range ballistic and cruise missile launches.

Pyongyang has never tested this many missiles in a single calendar month before, with last week seemingly putting an end to a nearly five-year-long self-imposed moratorium on long-range and nuclear weapons testing.

Jan 27- North Korea launched two suspected ballistic missiles into the Sea of Japan, the sixth round of weapons launched this month, according to South Korea's military.

The Joint Chiefs of Staff of South Korea said the weapons, which were likely short-range, were launched from an eastern coastal area, without specifying how far they flew.

Jan 25- Yonhap news agency reported, citing South Korean military sources, that North Korea has fired two cruise missiles into the sea off its east coast.

Jan 17- North Korea launched two suspected ballistic missiles into the sea, making it the fourth launch amid stalled dialogue with the US and Covid-related border restrictions.

According to a statement by the Joint Chiefs of Staff of South Korea, the missiles were launched four minutes apart, most likely from a region near Suhan, which is home to Pyongyang's international airport. The statement added that they traveled approximately 380 kilometers at a height of 42 kilometers and landed in the country's northeast waters.

Jan 15- North Korea launched two tactical missiles from railway-based systems, according to the state-run KCNA news agency.

"A firing drill for checking and judging the proficiency in the action procedures of the railway-borne missile regiment of North Phyongan Province took place on Friday," KCNA reported.

Jan 11- South Korea's military said that North Korea fired a suspected ballistic missile into the sea, less than a week after Pyongyang reported testing a hypersonic missile.

Jan 6- According to state news agency KCNA,  North Korea successfully tested a hypersonic missile this week, as the country seeks new military capabilities amid stalled denuclearisation talks.

Sept 29- North Korea test-fired a newly designed hypersonic missile, according to state news agency KCNA.

Last week, state media photographed Kim Jong-Un inspecting an "important" munitions factory that manufactures "a major weapon system."