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Sylhet, Chittagong Srimangal, Dhaka etc. Table-1 shows some remarkable earthquake affecting in and
around Bangladesh and Fig-1 shows the hypocenters of them . (Source: internet)
Table – 1: Some remarkable Earthquakes affecting in Bangladesh
Date
Name( Place)
Magnitude in
Rihcter
Epicenter distance from
Dhaka (km)
14-Jul-1885 Bengal earthquake (Bogra ) 7 17
8-Jul-1918 Srimangal Earthquake ( Srimangal) 7.6 15
8-May-1997 Sylhet Earthquake (Sylhet ) 6 21
21-Nov-1997 Chittagong Earthquake (Chittagong) 8.5 264
22-Jul-1999 Moheskhali Earthquake (Cox;s Bazar ) 5.2 3
27-Jul-2003 Chittagong Rangamati Earthquake 5.9 29
5-Aug-2006 Fridpur Earthquake 4.2 1
31-Aug-2007 Chandpur Earthquake 4.5 42
7-Nov-2007 Bandarban Earthquake 5.5 28
20-Sep-2008 Hajiganj Earthquake 4.5 1
20-Mar-2008 ManikgonjEarthquake 3.8 35
10-Sep-2010 HajiganjEarthquake 4.8 1
9-Jun-2011 Faridpur Earthquake 4.4 35
27-Aug-2011 ChandpurEarthquake 4.2 1
18-Mar-2012 DoharEarthquake 4.5 44
V. PARAMETERS OF EARTHQUAKE
Generally, the tectonic movement of the earth’s plates which forms the thin outer shell of the earth’s
crust causes earthquake. It is a geological hazard. There are mainly 4 measures for earthquake:
(source: internet)
• Magnitude
• Intensity
• Epicenter
• Depth
Magnitude measures the energy released which is generally based on the Richter scale measurements.
Intensity measures the scale of damage or casualty of the disaster.
VI. CATAGORY OF EARTHQUAKE
According to the magnitude, the Earthquakes are normally categorized as:
(Source: BMD)
• Very Minor (Less than 3 in Richter Scale )
• Minor (3.00 – 3.99 in Richter Scale )
• Light (4.00 – 4.99 in Richter Scale )
• Moderate (5.00 – 5.99 in Richter Scale )
• Strong (6.00 – 6.99 in Richter Scale )
• Major (7.00 – 7.99 in Richter Scale )
• Great (8.00 or More in Richter scale )
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