Bangladesh is the world’s eighth highest populated country, around 152 million; according to the United Nations it has 2.16% of the total world population [1] . The capital, Dhaka, is now the eleventh largest mega city with a population of 17.91 million, and it is predicted to be the sixth largest city in 2030 with a population 27 million [2] [3] . It is estimated that 28% of the population is poor and approximately 3.4 million people lives in slums [3] .

Dhaka is growing rapidly but urbanization is not planned properly. In the last couple of decades, thousands of multi-story buildings have been built without any open spaces and have encroached on the streets and roadways. In addition, most of the natural water reservoirs, such as ponds and ditches, have been covered over with buildings. In many instances, building regulations have not been properly supervised. Furthermore, there are many industries, including garment factories that are located within the capital. There are also buildings in the city that are poorly built, partly constructed with concrete, bamboo or tin and found in high density slum areas.

Dhaka is in a high risk earthquake area, and Bangladesh lies in a seismically active zone making it extremely vulnerable to major earthquakes [4] . Two major fault lines run through Bangladesh, one 144 km and the other 370 km from Dhaka. Bangladesh has had several fairly mild earthquakes in the last two decades [5] and two major ones in the past 100 years [4] . Most of the deadliest earthquakes have happened in the Asian belt in the past 30 years and thousands of lives have been lost and countries damaged, especially in Iran, Pakistan, China, Indonesia, Japan, Haiti and Turkey [6] [7] . At present, due to the recent disaster in Nepal, Bangladesh is highly susceptible to the risk of an earthquake. The present country context shows that, due to the unplanned developments in densely-populated, urban Dhaka, there is little evidence of any response strategy that might militate against an earthquake that would be likely to cause extensive damage and significant loss of life [5] . In this paper we describe the impact of the earthquake on Dhaka, the importance of initiating programmes to minimize the impact of any further earthquake.

The most popular Bangladeshi daily online version of six English newspapers was reviewed to explore the responses in Bangladesh after a mild earthquake which occurred in Bangladesh on 25th April, 2015. We did not review Bengali version of newspaper due to the time needed for translation from Bengali to English. Moreover, popular daily English e-version newspapers are available online and can be easily read by readers worldwide. The data collected were analyzed manually using content analysis. Categories were established and themes were developed from these categories [8] [9] .

Bangladesh experienced a medium-sized earthquake at the same time as the devastating earthquake in Nepal on 25 April 2015. Several news sources reported six died with two hundred injured, many of whom were admitted to hospital. These were reported to be due to the exiting of multi-storey buildings in a hurry while people were working. Those who were injured were mainly female―they were working in the garment factories. School children were also injured and developed illness. One study looked at the impact of the Haiti earthquake highlighted the injury burden due to earthquake disaster. Overall earthquake injury rate was estimated at 40.2/1000 (CI: 35.6 - 45.3) [21] . Very recently on October 2015, a major earthquake in remote Afghanistan and in Pakistan killed 363 people and injured another thousands of people. In one of the worst accident, at least 12 girls were killed in a rush to escape from the building [22] - [24] .

The response of people in Bangladesh to the earthquake indicates that there is a lack of education and preparation about what to do if such an event occurs or how to be safe during an earthquake (Figure 1). One newspaper mentioned that a lack of perception and knowledge were the main reasons that triggered panic. It also highlighted the fact that people came out of high-rise buildings using the stairs during the shaking of the earthquake. This is incorrect, instead they should find a safe corner of a room or building [25] [26] .

Our results show that many buildings tilted and cracked during and after the earthquake. The capital city, Dhaka, is very densely populated and is undergoing rapid urbanization. Dhaka is both susceptible to earthquakes but also very vulnerable to substantial building and infrastructure damage, which would leave its large population exposed to potentially more devastating conditions than ever before. There needs to focus immediately on earthquake-proofing buildings and also put in place other technologies such as those employed in other countries like Japan. After the Tsunami disaster, one study mentioned how they had proposed to reconstruction of seawall for future disaster mitigation that could affect coastal communities [27] . Another study in Japan mentioned

to focus on preventing the transmission of infectious diseases among evacuees [28] . Other study in Japan also focused on constructing a system for triage to respond to emergency patients from the initial phase after the Tsunami disaster in 2011 [29] .

The newspaper also stressed that a regular survey should be undertaken to audit integrity of older buildings, major public highways and bridges to identify hidden vulnerabilities and prevent future damage [30] . Recently after the Pakistan earthquake disaster, the survey report presented that 99.9% building in the Rawalpindi city are not earthquake proof and also did not have ability to resist in major earthquake [31] . There was an emphasis on the importance of a standard building codes and rules that were adhered to and the requirement that these should be properly enforced. This would minimize risks and also facilitate the removal of vulnerable buildings [32] . News sources illustrated Dhaka as ranking among the 20 cities most vulnerable to earthquake in the world and stressed that 112 years had already elapsed since a heavy tremor from the Dawki Fault had hit the region, so it was likely that another one was due. One source also described that a 7.6 magnitude earthquake recorded in 1918 in Sreemangal upazila of Moulvibazar district is about 180 kilometers away from capital Dhaka. At present, because of its location in a tectonically active area, it has the high possibility of a substantial earthquake happening at any time [33] .

A study predicted that around 78,323 buildings would be completely destroyed if an earthquake of the magnitude of 6 on the Richter scale shook Dhaka. A major earthquake of 7.5 on the Richter scale might kill about 88,000 people, demolish 72,000 buildings and damage 86,000 others in the capital. If an earthquake of an 8.5 magnitude hit the region, around 238,164 buildings would be completely destroyed across the country and economic loss due to damage of structures would be between US$650 million and US$1075 million just in the capital Dhaka [34] [35] . Another newspaper article stated that there needs to be huge awareness rising of earthquake preparedness and to take actions. The public can be made aware of earthquake survival through television programmes, newspapers, advertising hoardings, etc. A large scale campaign that includes earthquake safety demonstration is also needed to help manage such a disaster. The article also mentioned the need for regular training programmes for different services, agencies and volunteers for emergency rescue, for example police, army, fire service [32] .

In addition to educating the public, an appropriate gas leakage management system, power supply control, firefighting, alternative power generation, wireless communication system, heavy equipment for removing debris and emergency medical facilities are needed to help deal with the aftermath of an earthquake [32] [35] . Under the Comprehensive Disaster Management Programme (CDMP) to strengthen capacity to face disaster, the government decided to train 62,000 community volunteers to carry out rescue operation immediately following any disasters, including earthquake, yet to date 8000 - 9000 volunteers have been registered [5] [27] .

When one understands the disturbing situation in Bangladesh, especially the potential impact on the mega city, Dhaka, it is clear that there is an immediate need to set in place a comprehensive plan that would help to alleviate the damage and devastation of any future earthquake. Effective and time limited planning regulations are required, together with its implementation. This should be implemented in the immediate future in order to save thousands of live in Dhaka. The experiences and lessons learnt from the earthquake on 25th April 2015 in Bangladesh should provide sufficient evidence for the planners to focus on the above initiatives in the immediate future.

The authors declare no conflicts of interest.

AnimeshBiswas,Saidur RahmanMashreky,KoustuvDalal,ToityDeave, (2016) Response to an Earthquake in Bangladesh: Experiences and Lesson Learnt. Open Journal of Earthquake Research,05,1-6. doi: 10.4236/ojer.2016.51001