It was out of fear of accidentally landing where a wall had fallen that Twilight chose to teleport a little higher up in the air, and a little farther towards the castle than the edge of the room she'd been in before. It did lead to a striking image when she appeared there though, especially from Sunburst's point of view, looking up at her as she materialised in the sky and descended down towards him.
"You're alive?" the unicorn asked, in a mixture of shock and relief. And then, to promptly undercut any potential solemnity the moment might have had, he followed it by yelling, "What in Discord's name happened?"
"Really?" asked Starshine, perched on the rubble at Sunburst's side like a cat perches on a chair, taking up as little space as possible yet leaving none of it available for others. "Are we really going to start swearing by his name now? Just because he's not around?"
"Sunburst is perfectly justified in his nervousness," Twilight said, touching down in front of the two and looking around to take stock of the damage done. "I think for now the best course of action will be to head back to Ponyville and begin to sort out the consequences of this. How bad was it here?"
Sunburst stood incredulous for a moment. "The whole nation just shook, Canterlot is probably half in ruin again, and the first thing you think about is getting back to Ponyville?" He stepped closer to Twilight. "What happened?" he asked through gritted teeth. "You still haven't told me what you were doing up there."
"Every other town is probably doing just as bad as Canterlot is," Twilight replied, "I can help the most by being in Ponyville and coordinating all the efforts. That's where creatures will be looking for me. Starshine?" She turned towards the other at the time alicorn. "Can you have a look around the town here, and help anyone immediately in need? And make it clear there won't be new quakes anytime soon, they're likely worried about it."
Starshine silently threw a quizzical look at Sunburst, who after a moment of hesitation nodded. "On it!" she said then, and then she took off and flew away.
"The country needs something to reassure them after this, the sooner I throw together a public statement the better," Twilight said as she walked past Sunburst. "I should be able to make it back to Ponyville in a few teleportations, we'll check on the places we reach along the way as well." As she talked she held a piece of parchment and a quill in her magic, writing down something. A moment later she sent the letter away in a flash of light, then turned back to Sunburst. "Are you coming?"
The unicorn looked at her, squinting a little to see her better without his glasses. "The Behemoth just moved again for the first time since it got here, and you were on it. Tell me what you were doing there."