No.

Above / Below from Normal Temperature

Maximum /Minimum Temperature Definition

1.

+3°C to +4°C

Slightly Warm

2.

+5°C to +6°C

Markedly Warm

3.

+7°C to +8°C

Heat Wave

4.

+9°C and above

Severe Heat Wave

5.

-3°C to -4°C

Slightly Cold

6.

-5°C to -6°C

Markedly Cold

7.

-7°C to -8°C

Cold Wave

8.

-9°C and above

Severe Cold Wave

• Danger level
  Danger level is that gauge level, which is selected and fixed in such away that if it is exceeded by the river level, the place will experience inundation with water spilling over the banks.

• Minimum Alert level
  Minimum alert level is that gauge level, which is selected and fixed in such a way that, if the river level is fall below that level, it will cause difficulties in navigation and river pumping etc.

• Significant water level bulletin
  This bulletin is issued with forecasting unexpected rise of water level for the coming 3 to 7 days along middle and downstream of the river, due to the abrupt rise in up- stream of Ayeyarwady and Chindwin by 200cm ( about 7 feet) and above, especially during early monsoon period. It is aimed to warn the people, who temporarily reside near the river banks.

• Flood Warning
  This is the warning, issue 1 to 3 days in advance, describing the possibility of the occurrence of flood (exceed of danger level) in a certain place.

• Flood Bulletin
  When flood occur in a certain place, this bulletin is issued 1 to 3 days in advance, describing the condition of flood whether it will remain above danger level or fall below danger level.

• Flash flood
  The flood, which occur by the result of heavy or excessive amounts of rainfall within one day or hours of time, causing water to rise and fall quite rapidly in small rivers and streams.

• Widespread flood
  The flood, which occur by the result of three days and above consecutive heavy rain in the upstream catchments of the river and caused the movement of flood wave up to downstream of the river.

• Storm Surge
  Flooding that develops very quickly along the coasts or within the esfuaries of rivers as a result of the strong onshore winds during the land crossing a storm.

• Trans-boundary flood
  Occurrence of floods in rivers , due to water flowing through trans-boundary rivers.

Earthquake

An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves.

Richter Magnitude Scale

The Richter magnitude scale, also known as the local magnitude (ML) scale, assigns a single number to quantify the amount of seismic energy released by an earthquake.

Moment Magnitude Scale

The moment magnitude scale (Mw) is used by seismologists to measure the size of earthquakes in terms of the energy released.

Mercalli Intensity Scale

The Mercalli intensity scale is a scale used for measuring the intensity of an earthquake. The scale quantifies the effects of an earthquake on the Earth's surface, humans, objects of nature, and man-made structures on a scale of I through XII, with I denoting not felt, and XII total destruction.

Primary Wave (P-wave)

P-waves are type of elastic wave, also called seismic waves, that can travel through gases, solids and liquids, including the Earth. P-waves are produced by earthquakes and recorded by seismometers.

Secondary Wave (S-wave)

A type of seismic wave, the S-wave, secondary wave, or shear wave (sometimes called an elastic S-wave) is one of the two main types of elastic body waves, so named because they move through the body of an object, unlike surface waves.

Tsunami

A tsunami is a series of water waves caused by the displacement of a large volume of a body of water, usually an ocean, though it can occur in large lakes.