Abstract
The Sunda Strait Tsunami which occurred on 22nd December 2018 is one among too many examples of a rapid on-set disaster that attracted public attention through Twitter. This sudden event had a massive impact on parts of the west coast of Banten Province, Indonesia. Therefore, this research aimed to evaluate the collective response reflected on Twitter due to the 2018 Sunda Strait Tsunami. Previous studies shows the utilization of crowd sourcing data from social media for community capacity and quick assessment of disaster impacts. Therefore, the characteristics of people’s responses on social media based on spatio-temporal attributes needs to be understood first to build better understanding about the information that can be used for emergency response strategies consideration. This research method involved a spatial statistics approach, while data collection and descriptive analysis were carried out based on Twitter word cloud data. This analysis showed that temporally, the highest number of tweets was generated at the beginning of the disaster period with downward trend into the end of phase. As for spatially, people in directly affected areas by the disaster tend to give negative sentiments as their expression of sadness and fears towards the disaster. The content of the tweets involved asking for help, reporting on the current situation, and confirming the news on accounts belonging to government agencies. Furthermore, people in areas that were not directly affected produced tweets with more positive sentiment with expressions of condolences, sympathy, gratitude and invitations for volunteers and social actions.
Highlights
On December 22, 2018, at 21.03 Local Time or 14.03 UCT, a tsunami disaster with waves reaching 13.5 meters struck the coastal areas of South Lampung, Banten, and the surrounding islands of Anak Krakatau Volcano
This study aims to evaluate the response characteristics of the 2018 Sunda Strait Tsunami, in the area of Banten, Indonesia
The tsunami disaster that occurred in December 2018 became one of Indonesia's Trending Topics at the time through the hashtags #PrayforBanten and #PrayforAnyer
Summary
On December 22, 2018, at 21.03 Local Time or 14.03 UCT, a tsunami disaster with waves reaching 13.5 meters struck the coastal areas of South Lampung, Banten, and the surrounding islands of Anak Krakatau Volcano. The Tsunami caused an impact to the surrounding islands, such as Sertung, Rakata, and Panaitan Islands located around the Anak Krakatau Volcano. This tsunami wave was eventually identified to have been triggered by the volcanic flank failure at the Anak Krakatau Volcano[2][3] which created sub-aerial flanks[4]. Banten was likely less inundated due to the existing trace of coastal defense along the seaside
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