7NEWS presenter Mike Amor has not been back to Tasmania since the day that changed the nation.

On April 28, 1996, a gunman carried out a series of attacks that would see the quiet tourist destination become the scene of Australia’s deadliest mass shooting.

The attacks began in a nearby home before moving to Port Arthur, where Hobart man Martin Bryant opened fire on crowds at the Broad Arrow Cafe and surrounding grounds.

In just 90 seconds, 20 people were killed inside the cafe, with more victims targeted across the site and nearby roads, leaving 35 people dead and many others injured in a tragedy that would reshape Australia’s gun laws.

Amor was just a young reporter when he was assigned to cover the massacre. Returning to the scene 30 years on, he described the anniversary as “another tough day” for those who were at the site or lost loved ones in the attack.

“They’ll gather at 1pm in the Memorial Garden which is built around the remnants of Broad Arrow Cafe … they’ll hold a minute’s silence at 1.30pm, they’ll hear from survivors, local community members, and a song that was written for the 20th anniversary,” he explained.

Amor said there remains “a lot of pain” at Port Arthur Historic Site, describing Tuesday’s events as a small service and a “day of quiet reflection”.

“They’ll also lay wreaths at the foot of a Huon Pine cross that bears the names of 35 victims,” he continued.

He said the trauma of the attack is still carried by so many in ways that are impossible to fully articulate.

“One victim told me it was a split second that lasted his entire life,” Amor said.

The day, etched into our national fabric, also marked a turning point for Australia, sparking sweeping gun law reforms that would become among the strictest in the world.

It was a shift driven in part by the voices of those directly affected, including grieving husband and father Walter Mikac, who urged then-prime minister John Howard to “be strong, act now”.

Amor said that is the “one glimmer of hope” that those who lost loved ones are clinging to.

“Perhaps some good came out of something so horrific,” he said.

Thirty years on, the anniversary is being marked across the country, with Prime Minister Anthony Albanese saying the “terrible, indiscriminate cruelty of that day remains beyond understanding.”

“We think of everyone whose world was shattered by the loss of those who had been the bright centre of their lives, their love left desperately wrapped around an absence,” he said.

“Our hearts go out to everyone who has lived with decades of loss, and every survivor and loved one who is no longer with us but was shadowed by an inconsolable grief for the rest of their days.

“We think of all who survived, but with memories that would never soften.

He also paid respect to the first responders who arrived to scenes of “unspeakable horror” and who “somehow found the strength to do their duty”.

Bryant pleaded guilty to all charges and is serving 35 life sentences, plus 1652 years, without the possibility of parole.