Guwahati: A moderate intensity earthquake, measuring 5.6 on the Richter scale, hit Assam early Sunday, the India Meteorological Department said. There was no immediate report of any loss of life or damage to property.
The temblor occurred at 6.35 a.m. in Kokrajhar town.
Bengaluru, October 16, 2017 : Continuous monitoring of water levels in the foothills of the Himalayas can warn about an impending earthquake in the region, which is due for a major temblor.
This recommendation to the Ministry of Earth Sciences has come from Ramesh Singh, professor of environmental sciences at California’s Chapman University, who is also president of the Natural Hazards Group of the American Geological Union.
Singh says the utility of monitoring the water levels of underground aquifers for predicting earthquakes in quake-prone regions has been confirmed from analysis of water level data in a bore hole collected during the earthquake that rocked Nepal’s Gorkha district on April 25, 2015.
The findings of the study carried out by Singh and three seismologists from China have recently been published in the journal Techtonophysics.
The Gorkha quake, one of the deadliest in Nepal, killed about 5,000 people mainly in Nepal, a few in bordering India, two in Bangladesh and one in China, and injured about 9,200 people.
Whenever earthquakes occur, widespread cracks and deformations on the earth’s surface are common, resulting in changes in groundwater levels, Singh told this correspondent in an email.
In China, many parameters are being monitored in water wells, including water level, water temperature, and water radon concentrations to detect any signal prior to an impending earthquake.
According to the scientists, due to seismic wave propagation, the volume of an aquifer expands and contracts, forming fractures that change the water flow in a bore well sunk into the aquifer.
In the case of the Gorkha quake, the scientists considered the water level in a bore well — called “Jingle” well — atop an aquifer in China’s Shanxi province, 2,769 kilometres from the temblor’s epicenter. The data was analysed soon after the Nepal earthquake.
A “spectrum analysis” of the co-seismic response of the bore hole water level showed large amplitude oscillations with a maximum peak-to-peak value of about 1.75 metres associated with ground vibrations generated by the earthquake, says their report.
In addition, the analysis revealed the arrival of a possible precursor wave at the “Jingle” well about 6.5 hours prior to the actual occurrence.
“The study of co-seismic changes in groundwater has emerged as an important research area which can provide an improved understanding of earthquake processes and corresponding changes in surface and subsurface parameters,” Singh said.
Water level data in close proximity to the epicenter may be of great importance in getting early warning signals of an impending earthquake, he said. China and the United States routinely monitor aquifer water levels at 15-minute intervals.
In the light of the finding, Singh said that “India’s Ministry of Earth Sciences may consider deploying water level sensors in the Himalayan foothills areas, which may provide valuable information about an impending earthquake in the Himalayan region, which is due for a major earthquake.”
Such data, he added, “is also useful in understanding the dynamic nature of the Indian plate”.
However Arun Bapat, former head of Earthquake Engineering Research at the Central Water and Power Research Station in Pune, says he has some reservations about the study’s conclusion that water level changes observed in the bore hole were the warning signal for the Gorkha earthquake.
“Various effects associated with a large earthquake (Magnitude 7.5 or more) such as electrical, magnetic, geological, tectonic, hydraulic, radioactivity, etc., have been observed within about 600 to 800 km from the epicenter (but not beyond),” Bapat told IANS.
Bapat said the magnitude of the Gorkha quake was about 6.5 to 6.75 which is considered as moderate. “The effect of this quake on water level changes at a distance of 2,769 kilometres from its epicenter is almost not possible.” (IANS)
North Eastern India, the home to the ‘Seven Sisters’ is undoubtedly one of the most beautiful regions, yet the most unexplored part of the country. From Shillong’s rainfall to Assam’s beautiful tea gardens, the region is indeed the home to exotic beauty. However, the tourism of the region has gained pace in the recent years. The picturesque views of the streams, hills and farms are breathtaking.
Here is the list of 7 beautiful places to visit in North East India:
1. Kaziranga National Park
Kaziranga national park in Assam is famous for its one-horned rhinoceros. It is the most famous tourist spot & one of the beautiful places to visit in North East India. The place has been declared a UNESCO heritage site and attracts a lot of tourists from all over the world. Hundreds of migratory birds and around 35 species of mammals fly down every season to the national park. The incredible fauna cannot be found anywhere else in India.
2. Nathula Pass
A trek on the Nathula Pass in Sikkim will give you a memory completely irreplaceable. The beautiful scenic views which you will observe through your trek journey can be found nowhere else in India & makes if one of the beautiful places to visit in North East India. A vacation to this place with your family during the summers is a must. Also the fact that a bearable temperature in the summer season will let you enjoy your trek more. A trek in the Nathula pass should right away be added to your bucket list.
Cherrapunji in Meghalaya is the world’s wettest place. The place is known for receiving the maximum rainfall in the world. And, the weather of the place adds to its beauty. It is definitely one of the beautiful places to visit in North East India.
According to reports, the Phodong monastery in Sikkim is built in the 18th century. It situated 28 kms from Gangtok. It is known to be one of the most religious places for a sect of Buddhists. The place is a residence to around 260 monks. The place is full of positive energy. The people around the monastery are amicable and have some interesting stories in their pockets to tell you. The architecture of the monastery depicts a unique culture and beauty. These characteristics make this monastery, one of the beutiful places to visit in North East India. So grab your tickets soon!
5. Dampa Tiger Reserve
Dampa Tiger Reserve in Mizoram is the largest wildlife sanctuary in Mizoram & a must visit place in north east india. The Tiger Reserve is a home to leopards, barking deer, sloth bear, langurs, Indian Python and a variety of birds. The fauna and flora of the place will leave you stunned.
6. Majuli Islands
A river island situated along the Brahmaputra is a home to many tribes. A variety of birds can be found on the island. The size of the island has been reduced due to river erosion by the Brahmaputra.
7. Shilloi lake
Shilloi lake, the largest natural lake in Nagaland situated in the state’s Phek district is covered by picturesque views including beautiful mountain peaks and trees. The best time to visit this lake is in the summer season. The beauty of the lake makes it one of the most beautiful places to visit in North East India.
Mexico, September 20, 2017 : A powerful earthquake of 7.1 magnitude struck Mexico city, leaving more than 200 people dead and many trapped under the collapsed buildings. At about 2.15 p.m. (local time) on Tuesday, the earthquake shook central Mexico, its epicenter was 4.5 km east-northeast of San Juan Raboso and 55 km south-southwest of the city of Puebla, in Puebla state.
“We are facing a new national emergency,” said Peña Nieto, President of Mexico, in his first televised address following the earthquake.
The earthquake was felt far and wide. In Mexico City, there were power outages and more than 40 buildings collapsed crushing cars and trapping people inside.
Dozens of buildings collapsed or were severely damaged in densely populated parts of nearby states also.
Thousands of soldiers, rescuers and civilians — including college students — in Mexico City clawed through the rubble with picks, shovels and their bare hands. Windows buckled and shattered, falling several stories to the ground while thousands of people streamed into the streets running away from buildings and potential gas leaks.
People struggled to get home when power poles that toppled in the quake blocked the streets and the public transportation system temporarily shut down operations. Nearly 5 million customers were still without power early Wednesday.
The earthquake came less than two weeks after a massive 8.1-magnitude quake hit the country on September 7 and killed nearly 100.
The earthquake took place on the anniversary of a devastating earthquake that killed thousands in Mexico City in 1985. Just hours before the quake hit, many people took part in drills and commemorative events.
All public and private schools in Mexico City and some of the states affected by the earthquake will remain closed until further notice, Education Minister Aurelio Nuño tweeted.
Foreign leaders sent messages of support to Mexico. US President Donald Trump, who has courted controversy with his plans for a border wall with Mexico, tweeted: “God bless the people of Mexico City. We are with you and will be there for you.”
Canadian Prime Minister Justin Trudeau also tweeted his support following the “devastating news”.