The phrase "alarm spread" is correct and usable in written English.
It can be used to describe the dissemination or increase of concern or panic among a group of people regarding a particular issue or event.
Example: "As news of the impending storm reached the town, alarm spread quickly, prompting residents to prepare for the worst."
Alternatives: "panic spread" or "fear spread".
Alarm spread among the Americans and the Afghan policemen who were with us.
On Sunday morning, however, alarm spread among members when the page seemingly froze and rumors abounded that Facebook had somehow been compelled to shut it down.
The rescue package for the euro was assembled only after months of delay, with Germany resisting earlier efforts to shore up the single currency after alarm spread over the sovereign debt crisis in Greece.
The alarm spread as far as Connecticut.
As the alarm spread, the Acton Minutemen began to gather at Davis's home.
As the alarm spread to the south, reinforcements continued to arrive in the village.
The findings electrified what had been widely dismissed as a dull and lacklustre contest, and, with alarm spreading through the Labour establishment, senior figures started feuding publicly about the implications of the Corbyn surge.
For some three decades, Dr. Tarter, now 68, has been the person most likely to be the first to know if we make contact with E.T. — the one who will sound the alarm, spreading the news that We Are Not Alone.
With alarm spreading among CIA officials, Harlow testified, someone at the agency mentioned to him that Sterling had worked on the Operation Merlin program.
Upon receiving the news in the capitals of Europe, alarm spreads throughout the avant-garde, and for the next seventy years, the West's view on Soviet art is that of a culture void of artistic creation.
When a television station re-broadcast an interview with his wife, Graça Machel this month, suggesting that his "spirit" and "sparkle" were fading, the alarms spread far beyond South Africa's borders until the channel apologized, saying her remarks dated to 2009.
