Sikkim's Earthquake Disaster and Risk Communication

Dr. Vidhu Prakash Kayastha

Sikkim experienced small to moderate earthquakes in the first half of 2026. A 3.9 magnitude tremor was recorded near Soreng on January 3, and successive mild 2.6 and 2.8 magnitude tremors were recorded in Gangtok and Kalimpong on February 25. A moderate 4.1 magnitude earthquake centered just 1 km from Mangan in Sikkim on March 21 was also felt in Nepal, Bhutan, and Tibet. Although no casualties or major property damage were reported, a recent 5.6 magnitude earthquake centered in Bhutan on June 7 caused widespread tremors in Sikkim, Assam, and West Bengal.

Seismic activity is not a new issue in Sikkim. Located in the Himalayan seismic zone, Sikkim has experienced a number of small and large earthquakes in recent years. The increasing frequency and intensity of these earthquakes have necessitated immediate revisions to the state’s risk and disaster preparedness and communication strategies and a 24-hour preparedness in disaster management.

2011 Earthquake: A Sad Memory

The 6.9 magnitude earthquake of September 18, 2011, confirmed the seismic risk in Sikkim with warnings. The devastating earthquake, which killed over 100 people, caused widespread damage across Sikkim. Buildings in towns including Gangtok were damaged or affected, and landslides triggered by the event blocked important roads and infrastructure. Apart from the human and material losses, the earthquake also caused a major disruption to the state’s economy. The earthquake, in particular, led to a significant drop in tourist arrivals. After this crisis, the once-rebel Sikkim was forced to divert a large portion of its resources to reconstruction. Development in the region slowed and the state’s economy was put under pressure. The 2011 earthquake exposed the region’s seismic vulnerability as well as gaps in disaster preparedness, risk communication, and the need for resilient infrastructure to cope with future events.

Seismic Recurrent Events: Risks That Cannot Be Ignored

Three earthquakes in 2024 and 2025 since 2011 have provided further evidence of Sikkim's seismic hazards. On August 9, 2024, a 4.5-magnitude earthquake near Nayabazar shook Sikkim, with neighboring regions such as parts of Nepal also feeling the effects of the quake.

Shortly after the New Year celebrations, a 3.9 magnitude earthquake jolted the western and southwestern regions of Sikkim on January 2, 2025. This relatively mild earthquake was a warning of continued seismic activity in the region. Notably, two weeks later, on January 16, 2025, another 4.7 magnitude earthquake struck the state. This time, the tremors were felt across Sikkim, highlighting the frequency of seismic hazards.

On February 25, 2025, at 9:45 PM local time, an earthquake of magnitude 4.3 shook Sikkim, causing panic and insecurity. Although the frequency and intensity of seismic activity in this region during this two-year period were not catastrophic, it seems that the concerned sectors should seriously consider the ongoing risks faced by the people of Sikkim.

Risk Communication and Disaster Preparedness: The Key to Resilience

The recurring seismic events call for a serious reassessment of Sikkim’s disaster preparedness and risk communication strategies. While the region has made significant progress in improving its infrastructure since the 2011 earthquake, more needs to be done to ensure the safety of lives and reduce the socio-economic impact of future disasters, as recent earthquakes have shown.

Role of Risk Communication

Although risk communication is not a new concept for Sikkim and the rest of India, risk communication is a process that has yet to be effectively implemented in disasters to facilitate disaster preparedness, response and recovery. The risk communication process is a specific process in which experts, organizations, and the public exchange information about safety and health risks during a disaster. The primary goal of this process is to inform target communities at risk and empower them to take risk prevention actions.

The risk communication process involves the dissemination of timely, accurate and clear information about potential hazards, safety measures, and efforts by government and other supporting agencies to reduce risks. Risk communication informs communities about the risks in the event of an earthquake. Ensures that they know how to respond during, before, and after an earthquake. Periodic public awareness exercises, including preparedness, are necessary to reduce casualties and damage. For example, residents can be educated about the need to build safe shelters, workplaces, and schools, as well as the need to strengthen and rebuild old structures, and emergency evacuation procedures. Information about the availability of emergency shelters and the role of community-level response teams should also be made widely accessible. Local authorities should use all available media, including radio, television, and social media, to disseminate information about earthquake safety, early warning systems, and evacuation routes.

Preparedness and Infrastructure Resilience

Disaster preparedness is not just about communication processes, but also about building resilient infrastructure that can withstand repeated seismic disruptions. Since 2011, Sikkim has taken steps to rebuild and strengthen its infrastructure. These efforts need to be continued and expanded.

The economy is heavily dependent on agriculture, small-scale industries, and tourism. Natural disasters can disrupt crop production, disrupt trade, and discourage tourism. These areas are particularly vulnerable during earthquakes. Local businesses and industries need to be supported to minimize economic losses and ensure rapid recovery.

Strengthening and rebuilding old structures is crucial to reducing earthquake damage, especially in urban areas like Gangtok. The government needs to remain vigilant in enabling rapid recovery after a seismic event. The state needs to continue investing in strengthening transport networks, communication systems, and emergency response capabilities.

Economic Impact and Recovery

The earthquakes in Sikkim have had a far-reaching economic impact. Following the 2011 earthquake, the state's tourism industry suffered a major setback. The recovery process took several years. In subsequent years, earthquakes in 2016, 2017, and 2023 caused structural damage to buildings and infrastructure, creating additional economic challenges for local businesses. The ongoing need for reconstruction and repair work, coupled with the uncertainty of future earthquakes, makes it difficult for the state's economy to recover quickly.

Conclusion: Building a Seismically Resilient Future

While the issue of earthquake vulnerability in Sikkim is not new, it poses serious challenges. While the region has made progress in improving its infrastructure and disaster preparedness, frequent earthquakes highlight the need for further efforts in building resilience. Awareness and preparedness Risk communication must be a key component of Sikkim’s strategy to cope with future seismic events. Strengthening infrastructure, implementing building codes with ongoing effective monitoring, and improving community-level preparedness are all essential to mitigate the impact of earthquakes.

To manage seismic risk, Sikkim must be aware of its safe future by incorporating risk communication processes into policy-based disaster management.

(Dr. Kayastha holds a PhD degree in Risk communication)