The warning was conveyed by BMKG Chairperson Dwikorita Karnawati at a press conference in her office.
She said that the intense volcanic activities in Anak Krakatau volcano, extreme weather and high wave in Sunda Strait may lead to another collapse of the volcano's wall that may incite another tsunami anytime as it plunges into the sea.
"It is feared that it may potentially incite tsunami exactly like our hypothesis on tsunami that occurred on December 22," Dwikorita said.
"Based on those situations we urge people to remain alert, stay away at least 500 meters to 1 kilometer from the beach," she cautioned the people at the press conference.
Mobile applications would be provided by the BMKG, allowing people to monitor Anak Krakatau volcano activities live from their gadgets, she added.
Besides through the applications namely InfoBMKG and MAGMA Indonesia, the BMKG would also pertinently update the latest information related to tsunami risk from the volcano in its social media accounts, she said.
"We expect people to continue monitor development of information. The MAGMA Indonesia would provide the early warning related to level of Anak Krakatau volcanic activities," she said.
Provision of the mobile application was also aimed at straightening up the information following frequent false information circulated in social media about Sunda Strait tsunami that incited panic among people.
The mobile application was particularly provided to monitor emergency situation in Sunda Strait and Anak Krakatau volcano, does not apply to the other areas in the country, she pointed out.
Indonesia search team has recovered 429 bodies from several affected areas in Java's Banten province and Sumatra's Lampung province so far from Sunda Strait tsunami caused by Anak Krakatau volcanic activities.
The disaster has also left over 1,400 injured, damaged over hundreds of houses and boats, displaced over 16,000 people.
