Groundswell
An upheaval or change in public mood or sentiment, often associated with external events, but occurring without external guidance or direction. New technologies such as social media can trigger and signal a ■■■■, such as a shift to online or mobile communication.
An outburst is a change in public opinion about an issue, usually caused by external events or influences.
Meanings of Groundswell
An open ocean wave, often due to distant waves.
(by extension) A general change in public opinion.