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New Post: Taiwan earthquake: Tsunami warnings issued after 7.4 magnitude quake strikes of east coast -CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning... CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning following the quake. An alert from CWA was sent to residents, though not all received it, warning that a tsunami was expected to impact the northern coastal area and that residents are advised to evacuate to higher ground. The Japan Meteorological Agency also issued a tsunami warning for Miyakojima and Okinawa islands, warning of waves up to 3 meters expected imminently. Several aftershocks were felt in Taiwan, including one that registered a magnitude of 6.5, according to the USGS. Taiwan is located on the Pacific Ring of Fire, which runs around the edge of the Pacific Ocean and causes massive seismic and volcanic activity from Indonesia to Chile. The island is regularly rocked by earthquakes. A magnitude 6.2 quake hit near Hualien in 2018, killing at least 17 people and injuring more than 300 others. In 1999, the biggest quake in recent memory killed 2,400 people. Hualien County is home to about 300,000 people and close to Taroko Gorge, a popular tourist destination. This is a developing story and will be updated. Source link

New Post: Taiwan earthquake: Tsunami warnings issued after 7.4 magnitude quake strikes of east coast -CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning... CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning following the quake. An alert from CWA was sent to residents, though not all received it, warning that a tsunami was expected to impact the northern coastal area and that residents are advised to evacuate to higher ground. The Japan Meteorological Agency also issued a tsunami warning for Miyakojima and Okinawa islands, warning of waves up to 3 meters expected imminently. Several aftershocks were felt in Taiwan, including one that registered a magnitude of 6.5, according to the USGS. Taiwan is located on the Pacific Ring of Fire, which runs around the edge of the Pacific Ocean and causes massive seismic and volcanic activity from Indonesia to Chile. The island is regularly rocked by earthquakes. A magnitude 6.2 quake hit near Hualien in 2018, killing at least 17 people and injuring more than 300 others. In 1999, the biggest quake in recent memory killed 2,400 people. Hualien County is home to about 300,000 people and close to Taroko Gorge, a popular tourist destination. This is a developing story and will be updated. Source link

New Post: Taiwan earthquake: Tsunami warnings issued after 7.4 magnitude quake strikes of east coast -CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning... CNN  —  A major earthquake with a magnitude of 7.4 struck off Taiwan’s eastern coast Wednesday, according to the US Geological Survey, prompting tsunami warnings for the island and southern Japan. The quake’s epicenter is located about 18 kilometers (11 miles) south of the city of Hualien. Taiwan’s Central Weather Administration issued a tsunami warning following the quake. An alert from CWA was sent to residents, though not all received it, warning that a tsunami was expected to impact the northern coastal area and that residents are advised to evacuate to higher ground. The Japan Meteorological Agency also issued a tsunami warning for Miyakojima and Okinawa islands, warning of waves up to 3 meters expected imminently. Several aftershocks were felt in Taiwan, including one that registered a magnitude of 6.5, according to the USGS. Taiwan is located on the Pacific Ring of Fire, which runs around the edge of the Pacific Ocean and causes massive seismic and volcanic activity from Indonesia to Chile. The island is regularly rocked by earthquakes. A magnitude 6.2 quake hit near Hualien in 2018, killing at least 17 people and injuring more than 300 others. In 1999, the biggest quake in recent memory killed 2,400 people. Hualien County is home to about 300,000 people and close to Taroko Gorge, a popular tourist destination. This is a developing story and will be updated. Source link

Japan's Prime Minister Cancels Trip After Seismic Alert Japan's prime minister today cancelled a planned trip to Central Asia after earthquake experts warned that the country should prepare for a possible strong tremor. "As the prime minister with the greatest responsibility for managing the crisis, I have decided to stay in Japan for at least a week," Fumio Kishida told reporters.   The head of government was due to visit Kazakhstan, Uzbekistan and Mongolia and had planned to attend a summit of five countries in the region. At least 13 people were injured in Thursday's earthquake measuring 7.1 on the open Richter scale in south-west Japan, said the authorities, who warned of the possibility of strong aftershocks. The Japan Meteorological Agency (JMA) warned that this event appears to be linked to a future larger earthquake on the Nankai fault, one of the world's most active seismic hotspots and where a strong tremor is expected to occur in the coming decades. "The probability of another strong earthquake is higher than normal, but this does not indicate any certainty," said the JMA. This is the first time an alert of this kind has been issued since a new system was set up in 2011. The most powerful earthquake ever recorded in Japan, of magnitude 9, occurred on 11 March 2011 on the north-east coast and triggered a tsunami that left around 20,000 dead or missing. The Japanese government had already stated that there was a 70 per cent chance of a strong earthquake hitting the country in the next 30 years. A quake that could affect a significant part of Japan's Pacific coast and threaten around 300,000 people, according to experts. Japan is located on the so-called "Ring of Fire" in the Pacific, an area of great seismic and volcanic activity, where thousands of earthquakes are recorded every year, most of them of weak to moderate magnitude, and with close to 120 active volcanoes. https://ift.tt/dltnkPg

*What’s Shaking Alaska?!* Welcome to your July 10th seismic update from across the state. Over the past week, we recorded about 360 seismic events, two of which were earthquakes reported as felt. The largest event was a magnitude 4.1 earthquake on July 10th at 1 am, located around 70 miles southeast of Homer, and near the surface. It was reported as felt in Homer and Kodiak. Today is a notable one in Alaska earthquake history – it’s the anniversary of the 1958 Lituya Bay earthquake and ensuing tsunami. At 10:16 pm, the earthquake ruptured 125 miles of the Fairweather fault. Its magnitude was estimated at a 7.8, and the shaking was extreme. Eyewitnesses in the bay reported numerous avalanches, and a cliffside at the head of the bay collapsed into the water. This launched what is known as the tallest tsunami ever recorded in the world, rising 1720 feet. One boat anchored in the cove was carried over the spit, and another was sunk. (Photo with story from U.S. Geological Survey (USGS) There is evidence that landslides in the same location have happened several times in the past, suggesting that similar events will happen in the future. Today, tsunami experts with the Alaska Earthquake Center use computers to model the maximum inundation in coastal areas of Alaska following a large earthquake. They work with community planners to keep residents and visitors safe. Staying safe means being aware and prepared. Learn more at earthquake.alaska.edu. For detailed seismicity reports, visit the Earthquakes tab on our website. For a terrific, in-depth story on the Lituya Bay tsunami, visit https://lnkd.in/gdhBkuRM

Japan on High Alert: The Megaquake Warning Last Thursday, Japan experienced a 7.1 magnitude earthquake off the southern coast in the Kyushu region, prompting the Japan Meteorological Agency to issue its first-ever megaquake warning. This alert highlighted the risk of severe shaking and large tsunamis, particularly along the Nankai Trough (I am attaching the picture). I live in the Kyushu region in Japan so this news made me research what this megaquake warning was about. I am sharing my findings and I think it would be helpful for the people living in the region where there is a strong possibility of damage due to this potential megaquake. Japan is one of the most earthquake-prone nations in the world. Historically Japan experiences a mega earthquake roughly every 100 to 150 years. The Nankai Trough, a 900 km-long subduction zone off Japan's southwest Pacific coast, is a key area of concern. Here, tectonic stress builds as the Philippine Sea Plate is pushed under the Eurasian Plate, setting the stage for a potential megaquake. Experts warn that last Thursday's earthquake could be a precursor to a more devastating quake along the Nankai Trough. A 2023 study noted the high probability of successive Nankai megathrust earthquakes, often occurring in pairs, as seen last in 1944 and 1946. The impact of such a quake could be severe. The Earthquake Research Committee estimated a 70-80% chance of a megaquake occurring within the next 30 years, potentially affecting areas from Shizuoka to Kyushu. Tsunami waves up to 98 feet high (around 30 metres) could hit Japan's Pacific coast, with economic damage reaching $1.5 trillion. An estimated 50% of Japan's population will be affected. While the advisory is a warning, not a prediction, it’s a reminder to stay informed, prepare, and review evacuation plans. Being proactive can make a significant difference in mitigating the impact of such a natural disaster.

On September 24, a magnitude 5.8 earthquake struck near Torishima island, prompting the Japan Meteorological Agency (JMA) to issue an unprecedented advance warning for a potential tsunami. This proactive measure was attributed to technological advancements and the expertise of JMA staff, who emphasized that human judgment is crucial in decision-making, beyond what artificial intelligence can provide. Previous earthquakes of similar magnitude around Torishima have historically led to tsunamis, observed in 1984, 1996, 2006, 2015, and 2018. However, linking these events to nearby undersea volcanic activity has posed challenges for the JMA. Unlike in the past, when warnings were issued post-event, the JMA has focused on studying moderate earthquakes capable of generating tsunamis, as most tsunamis are usually linked to larger quakes. Just six minutes after the earthquake, the JMA issued a tsunami advisory. Tsunami waves, with a peak of 70 cm recorded on Hachijojima island, affirmed the need for timely alerts, as tsunamis can arrive rapidly. The agency uses a database of 100,000 tsunami impact simulations, expanded with data from the Torishima region. On the day of the quake, JMA staff analyzed seismic waveforms against historical data to guide their warnings. The complexity of offshore tsunami prediction, aggravated by limited observation infrastructure, underscores the importance of skilled human oversight. With World Tsunami Awareness Day approaching on November 5, the JMA highlighted the need for public trust in its warning systems and urged action even in the absence of visible tremors. #AsiaRisk #NaturalDisasters #Japan Get a full accounting of the security situation in Asia by subscribing to Security Asia. Subscribe now--free of charge--at https://lnkd.in/g7Cs8Gkf https://lnkd.in/gVea2UpU

A catastrophic earthquake and tsunami are anticipated for the Pacific Northwest coast, stemming from the Cascadia Subduction Zone. This 700-mile fault, stretching from Northern California to Vancouver Island, could trigger a 9.0 magnitude earthquake similar to Japan's 2011 disaster. Recent research has revealed the fault is divided into several segments, each with unique geological properties, with the segment off Washington's coast posing the greatest risk. Despite the known dangers, infrastructure built before 2005 was not designed to withstand such an earthquake, and tsunami building codes were only implemented in 2016. The geological record indicates these mega earthquakes and tsunamis occur approximately every 500 years, with the next one expected within the next 200 years. The preparedness of the Pacific Northwest is inadequate, with many bridges, buildings, and critical facilities in vulnerable locations. Experts like Corina Allen from the Washington Geological Survey and Yumei Wang from Portland State University highlight the pressing need for retrofitting and building vertical evacuation structures. Currently, only three such structures exist in the region, with four more planned, though at least 50 are needed in Washington alone. Despite the potential for severe consequences, investment in necessary preparations is slow, hindered by the uncertain timing of the next event and the substantial costs involved. Seismologist Diego Melgar emphasizes that comprehensive preparations are a long-term effort that may not yield immediate benefits but are crucial for future generations. Ensuring safety involves building codes, early warning systems, and accessible evacuation zones, but achieving this requires significant financial and societal commitment . --- Sources: 1. Diego Melgar, University of Oregon 2. Corina Allen, Washington Geological Survey 3. Yumei Wang, Portland State University 4. CNN. "The Worst Airports in the U.S. for Connecting Flights"

New Post: 7.1 magnitude earthquake in Japan: Epicenter 8.8 km below ground in Kyushu Island, tsunami alert issued - https://lnkd.in/eyGz9Cvz hours agocopy linkA magnitude 7.1 earthquake struck Japan's Kyushu Island on Thursday.A 7.1 magnitude earthquake was felt in Japan on Thursday. After this a tsunami alert has been issued. The epicenter of the earthquake is said to be about 8.8 km below the ground in Japan's Kyushu Island. A tsunami advisory has been issued in Miyazaki, Kochi, Oita, Kagoshima and Ehime cities.Earlier on January 1, an earthquake of 7.6 magnitude hit Japan. 318 people died and 1300 were injured in this. The earthquake caused fires in many places in Ishikawa. 200 buildings were burnt to ashes due to this.Earlier in March 2011, the most dangerous earthquake ever occurred in Japan, in which 16 thousand people died.See the location of Kyushu city, the epicenter of the earthquake, on the map...How do we decide whether it is a tsunami or not?According to Japan's 'Tsunami Warning System', if a tsunami advisory or alert is issued after an earthquake and after this 1 meter high waves rise in the sea, then it is placed in the tsunami category. Their height can later be 3 to 5 meters. If the waves rise up to 5 meters, then it is placed in the 'Major Tsunami' category.Why does most tsunamis occur in Japan?It is one of the most earthquake-prone areas. Earthquakes keep occurring here because it is located near the junction of two tectonic plates. Ishikawa Prefecture, where the earthquake occurred, is located close to the Ring of Fire, a horseshoe-shaped series of seismic fault lines around the ocean.The Ring of Fire is an area where oceanic tectonic plates are present along with continental plates. When these plates collide with each other, an earthquake occurs. Their impact causes tsunamis and volcanoes also erupt.90% of the world's earthquakes occur in this ring of fire. This area is spread over 40 thousand kilometers. 75% of the active volcanoes in the world are in this region.What kind of signs are seen before a tsunami hits the ocean?Whenever a tsunami occurs after an earthquake, the waves moving below the surface of the sea first hit the shores. When the waves below the sea move towards the shores, a vacuum is created below, which pulls the water above the shore towards the sea. This makes the land on the shore of the port or the sea floor visible.The retreat of sea water is a sign that a tsunami is about to arrive. A few minutes or hours later, the tsunami wave hits the shore with great force and noise.A tsunami is a series of destructive waves that come one after the other. This is called a 'wave train'. As waves one after the other reach the shore from the middle of the sea, the strength of the tsunami increases.People who have faced the tsunami tragedy say that just because a small wave has come and g