When tragedy grips the nation — tornadoes in Oklahoma, a bombing in Boston, a school massacre — the banal conversation on Twitter and Facebook morphs instantly.
People post news and photos of the victims. Many tweet condolences. Others fall silent. It's like a very public, very noisy memorial service.
At the same time, some still stick to sharing cat videos, which offends some mourners.
This confusing collision of conversations is raising questions about the emerging etiquette of tweeting during tragedy. What is appropriate? What if you don't tweet anything at all? Does that signal you don't care?
It's a dilemma giving some Twitter users pause. Marina Maric of Minneapolis has been tweeting since 2006, yet she still wonders what to say when catastrophe overwhelms her feed. Before she knew that an F-5 tornado had ripped through Moore, Okla., on May 20, she posted a joking tweet about her hotel in Portland. But when she read about the disaster, she worried that her previous tweet might have seemed flippant.
Soon, she posted: "I was up in the air all day ... catching up on the news from Oklahoma just now. How sad."
The sentiment was genuine, she said, but also an attempt to comply with this evolving etiquette.
"I did at some point think, 'People are going to think I'm insensitive,' " Maric said. "I needed to acknowledge to the world that I knew something had happened."