Only from the beginning of the 20th century until now, the number of major earthquakes recorded has increased. At the beginning of the 20th century, strong earthquakes that had just occurred scattered fell in 1906 (USA), 1923 (Japan), 1960 (Chile), and 1963 (Macedonia).
By the following decades, the frequency of large earthquakes appeared to be getting thicker as the 1970s (Peru), 1972 (Nicaragua), 1976 (Mexico), 1985 (China), 1988 (Armenia). ), and in 1993 in India.
Since then, the number of times the major earthquakes increased further. In the remaining six years of the 90s, almost every year happened, except in 1996, with a total of seven matches. Particularly in 1995 there were two matches and 1999 three matches.
Victims of earthquake in Indonesia still have not been horrified (Photo: BTP)
And from 2000 to now, the frequency of large earthquakes appears to be the highest in the past century and occurs all years except 2000.
From 2001 to May 27, 2006, at the time of the earthquake in Indonesia, up to 13 major earthquakes were recorded. In the first 5 months of this year, there were two fierce battles. Last year three matches. The other two years. And before that, four more games.
Excluding Chile's record 9.5 magnitude earthquake in 1960, scientists found that the later the magnitude of the magnitude became stronger. In addition to the denser appearance, geologists are thinking of a new period of cyclical shift.
- Earthquake in Java (Indonesia) on May 27 was thought by some scientists to be a sign of a new period of instability of the so-called Pacific Fire arc not far from Vietnam.
- A project to establish a 5 million USD earthquake monitoring network in Vietnam funded by Japan, which is pending approval.
That hypothesis, which is strongly opposed, is likely to mean that countries in the region adjacent to large continental plots can receive more earthquakes, especially the Crown of the Thai Fire Arc. Binh Duong.
Indonesia is located in an area called the Pacific Flame, which accounts for 90% of earthquakes worldwide.
Vietnam still peaceful?
Vietnam, although not close to the Ring of Fire TBD like Indonesia, is also located in the position identified as at risk. However, under the eyes of Vietnamese scientists, the concern seems to be excessive.
'The recent earthquake in Indonesia is not very special if it is located on another major fault' , Associate Prof. Dr. Nguyen Ngoc Thuy, Director of the Institute of Geophysics (IoG), Vietnam Academy of Science and Technology Male, said.
Doctors are treating an injured person. (Photo: AFP)
According to Assoc. Thuy, if mentioning the magnitude 5 earthquake in Indonesia, almost every day. The earthquake of 6 degrees and above is also quite frequent. As for Vietnam, according to Assoc. Prof. Thuy, the group of countries with a weak average earthquake level.
In addition to the small earthquakes in May and August 2005 off the coast of Vung Tau, Associate Professor Thuy said that the whole country only recorded sporadic earthquakes but the largest is only about 4 richter.
Most recently, at 0:00 am on April 4, a 4.3-magnitude strong earthquake occurred off the coast of Nam Dinh province, about 100 km from the coast of Hai Hau district.
The earthquake occurred on the Red River fault extending into the East Sea. Previous records indicate that a 3-magnitude quake occurred in Nam Dinh waters. According to IoG forecast, earthquakes in this area can be as strong as 6 richter.
Latest funding commitments for people in distressed areas as of Sunday afternoon, May 28 (BBC source)
United Kingdom - 5.5 million USD;European Union - 3.8 million USD;US- 2.5 million USD;Australia - 2.3 million USD;China - $ 2 million;Canada - 1.8 million USD
'But it is not so that we are subjective,' Professor Thuy warns, 'Because there is still a long way to be able to predict exactly what will happen'.
Currently, 25 nationwide seismic gauging stations can be identified and help timely report earthquakes of 3 magnitude. However, these stations are unevenly distributed. From Quang Tri, there are only three stations located in Hue, Da Lat, and Nha Trang.'So southern vibrations are often not detected in time as in the North,' said Professor Thuy.
Permitted by the Prime Minister in March 2006, IoG is urgently building a project to strengthen the warning force of earthquakes and tsunamis in Vietnam. Accordingly, the new machinery system will be installed across the country and ensure the alert capacity of 4 magnitude earthquakes.
On the other hand, a project to establish a US $ 5 million earthquake monitoring network funded by Japan has also been developed and is currently awaiting approval from our Ministry of Planning and Investment.