Earthquake: Difference between revisions

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The '''1994 Greenfield earthquake''' was a moment magnitude 7.5 (M<sub>w</sub>), blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST from the coast of Greenfield all the way to the San Fernando Valley region of the City of Los Angeles. The quake had a duration of approximately 30-40 seconds, Shaking was felt as far away as San Diego, Turlock, Las Vegas, Richfield, and Phoenix.  
The '''1994 Greenfield earthquake''' was a moment magnitude 7.5 (M<sub>w</sub>), blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST from the coast of Greenfield all the way to the San Fernando Valley region of the City of Los Angeles. The quake had a duration of approximately 30-40 seconds, Shaking was felt as far away as San Diego, Turlock, Las Vegas, Richfield, and Phoenix.  


Two aftershocks followed, the first about one minute after the initial event and the second approximately 11 hours later.
Two aftershocks followed, the first about one minute after the initial event and the second approximately 11-12 hours later.


== Epicenter ==
== Epicenter ==
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4 buildings collapsed in Downtown Greenfield, and another 5 in Chinatown. Many of the interstates were blocked by debris, and many building were in really bad shape.One of the bridges overpassing the interstate INTERSTATE NAME HERE, and a couple other parts of infrastructure collapsed in the financial core.
4 buildings collapsed in Downtown Greenfield, and another 5 in Chinatown. Many of the interstates were blocked by debris, and many building were in really bad shape.One of the bridges overpassing the interstate INTERSTATE NAME HERE, and a couple other parts of infrastructure collapsed in the financial core.
Around 10 buildings collapsed in Ramona, Dawson and the other areas surrounding downtown.
Santa Cecilia was partly disconnected due to a truck that crashed into one of the stores, blocking the main road, and the bay bridge being in bad shape. Around 5 buildings collapsed in Santa Cecilia, but many of the beach houses were badly damaged and had to be rebuilt entirely.
Los Llanos, Palma and Rio Pueblo werent hit as hard with in total only 7 houses collapsing, but with many being in bad shape. However Due to the emergency services focusing on the airport and downtown, looting was a big problem after the earthquake.
Rockwell had a lot of unstable beach houses, even before the earthquake so 18 buildings collapsed, with many being in bad shape. A parking structure of the Tropicana Palms hotel collapsed, and a lot of roads were blocked by debris.


== Minutes after the quake ==
== Minutes after the quake ==
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The Glenview waterfront was blocked off from the rest of the city, due to the interstate collapsing onto every road into Glenview. The residents of the area came together and set up a first aid camp on the waterfront park, they also made a temporary living setup for residents with houses in bad shape, or without them.  
The Glenview waterfront was blocked off from the rest of the city, due to the interstate collapsing onto every road into Glenview. The residents of the area came together and set up a first aid camp on the waterfront park, they also made a temporary living setup for residents with houses in bad shape, or without them.  


Ashfield central was flooded due to multiple sewerpipes bursting. Many residents evacuated the tall buildings and were brought to the ashfield waterfront by the Ashfield police. The police couldnt reach other areas due to flooding and collapsed infrastructure, so they helped rescue victims of collapsed buildings, and keep ashfield as safe as possible.
Ashfield central was flooded due to multiple sewerpipes bursting. Many residents evacuated the tall buildings and were brought to the ashfield waterfront by the Ashfield police. The police couldnt reach other areas due to flooding and collapsed infrastructure, so they helped rescue victims of collapsed buildings, and keep ashfield as safe as possible. They set up a large temporary living camp on the grass field in the park, and police evacuated people to get them away from the buildings in case there was another aftershock.
 
Downtown was a mess, with collapsed infrastructure and heavily damaged buildings it was already very hard to navigate, but with all the toxic fumes and debris that came from the collapsed tower, it became even harder for the police to evacuate people to a save space. Everyone was forced to wear a mask so they wouldnt breath in as much of the toxic air. The citizens were evacuated to three spots in the city, the city hall, the downtown marina and the santa cecilia bay bridge.
 
A large fire started in Chinatown, burning down atleast 5 buildings before it was put out by the residents of the area.
 
Ramona, Dawson and other areas near downtown were neglected by emergency services and looters ran around the streets. The ground under one of the houses in Ramona collapsed onto the interstate nexto it. Blocking one of the only still nagivable interstates to downtown. While some streets in Ramona were flooding due to bursted sewer pipes, they still managed to set up a first aid camp on the parking lot of the ramona plaza mall, a large stripmall. Residents came together to help others out of collapsed buildings, and put out fires.
 
Santa cecilia was partly disconnected so they couldnt get as much help from Downtown emergency services as other areas. Luckily many residents voluntarily made a first aid camp on the beach, and helped others get out of badly damaged buildings.
 
Los Llanos, Palma and Rio Pueblo were all very badly hit by looters and fires raged in the areas due to emergency services focusing on the airport and downtown. A first aid camp was made near the convention center.
 
Rockwell was a mess with many residents hurrying out of their houses onto the beach, with lots of rubble in and around the area. An emergency aid camp was set up by the palma police department to resident the victims of the earthquake.
 
== The day after the earthquake. ==
A lot of infrastructure was either blocked, or collapsed so especially in and around downtown heavy gridlock was in effect, A lot of the main interstates were blocked off by emergency services, so people had to drive through city streets to get away. Santa Cecilia was one of the only places people could easily drive through, however with the mass of traffic going into the small side streets, Santa Cecilia ended up gridlocked aswell, so did Ramona, Dawson Los Llanos, Rio Pueblo, Ashfield, Glenview and Westwood. Many of these were pretty dangerous without power or police supervision. Emergency services started rescues all over the city and took over most of the makeshift first aid camps. Surrounding cities in california sent rescue operations to help with the damage, including LA, San Francisco, And multiple cities in the valley.
 
With flooded, blocked or collapsed infrastucture, gridlocked traffic and rescue operations going on all over the city the last thing they would want was another aftershock to start.
 
So at 3:59:19 p.m. PST the second aftershock, almost 12 hours after the first struck. An 6.8 aftershock that lasted for 10-20 seconds struck the city.
 
not finished

Revision as of 22:58, 22 June 2023

The 1994 Greenfield earthquake was a moment magnitude 7.5 (Mw), blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST from the coast of Greenfield all the way to the San Fernando Valley region of the City of Los Angeles. The quake had a duration of approximately 30-40 seconds, Shaking was felt as far away as San Diego, Turlock, Las Vegas, Richfield, and Phoenix.

Two aftershocks followed, the first about one minute after the initial event and the second approximately 11-12 hours later.

Epicenter

The earthquake struck in the Greenfield Bay Area about 95 miles (152 km) Southwest of downtown Los Angeles. While the epicenter struck in Greenfield, cities in the san fernando valley, like northridge also suffered major damages.

The earthquake

It was a windy morning in the Greenfield bay area. Residents woke up to get ready for work, while residents working the night shifts returned home from a nights work. At 4:30 AM. PST a large roar filled the city, followed by heavy shaking that lasted approximately 30-40 seconds. Damage occurred up to 95 miles away, with the most damage in the Greenfield Bay area, and the San Fernando Valley. The area most affected by the earthquake were the neighbourhoods of Ashfield, Northpark, Clinton and other central areas like Glenview. Many older apartment buildings suffered major damages, and even collapsed, most famously the Carrien, which stood at 8 floors tall in Downtown Ashfield. Unfortunately the city saw major losses, The highway leading up to the bridge from greenfield to ashfield partly collapsed onto the brand new marina under it, An old historic warehouse on one of the piers completely collapsed, and so did 9 other buildings, the tallest finished structure was the 12 storey tall apartment building right nexto the bridge connecting downtown greenfield and ashfield. Many buildings in ashfield were badly damaged, and had to either be repaired or torn down.

Northpark, clinton, springfield and western ashfield were mainly large warehouses and factories. During the first earthquake many of these were not up-to-date and collapsed A large crane that wasnt bolted correctly fell onto the nearby interstate I-15, blocking the road for the duration of the week

Other districts around the epicenter include glenview, westwood and downtown greenfield.

Glenview was hit hard during the earthquake, many of the original brick buildings, lining the main streets collapsed. And so did many other homes and apartment buildings in the area. 31 buildings collapsed, the houses on the waterfront were closed off by the freeway collapsing, and lost power instantly.

Around 43 buildings collapsed in and around westwood, this area was a working class neighbourhood, so many of the buildings werent up to standard and collapsed, this includes the Westwood Community Center which, during the earthquake, collapsed. One of the iconic bridges going over the river was badly damaged, and so were other peices of infrastructure in the area. Around 20 buildings collapsed.

4 buildings collapsed in Downtown Greenfield, and another 5 in Chinatown. Many of the interstates were blocked by debris, and many building were in really bad shape.One of the bridges overpassing the interstate INTERSTATE NAME HERE, and a couple other parts of infrastructure collapsed in the financial core.

Around 10 buildings collapsed in Ramona, Dawson and the other areas surrounding downtown.

Santa Cecilia was partly disconnected due to a truck that crashed into one of the stores, blocking the main road, and the bay bridge being in bad shape. Around 5 buildings collapsed in Santa Cecilia, but many of the beach houses were badly damaged and had to be rebuilt entirely.

Los Llanos, Palma and Rio Pueblo werent hit as hard with in total only 7 houses collapsing, but with many being in bad shape. However Due to the emergency services focusing on the airport and downtown, looting was a big problem after the earthquake.

Rockwell had a lot of unstable beach houses, even before the earthquake so 18 buildings collapsed, with many being in bad shape. A parking structure of the Tropicana Palms hotel collapsed, and a lot of roads were blocked by debris.

Minutes after the quake

Chaos ensued in the minutes after. The power grid went down in eastern Greenfield, with neighbourhoods like los llanos being without power for 2 days after. A train derailed near Ramona and crashed into the neighbouring canal. water and gas lines broke all over the cities, many streets were flooded and homes got set on fire.

A minute after the original quake another magnitude 6.3 aftershock struck, the aftershock had a duration of about 10-20 seconds. the areas that still had power didnt anymore and the bay was filled with darkness.

With no police around, and infrastructure blocked people started looting neighbourhood stores or helped others get out of their homes.

GIA was chaos with many late night travelers hurrying out of the emergency exits into the airport or streets. A boeing 747 Golden Pacific flight 007 ran off of the taxiway into a nearby ditch, other planes were stopped on the taxiways. Flights going towards GIA were rerouted to the nearby LAX and SFO airports.

The roof of the eastern terminal 1 wing partly collapsed and an oil truck exploded at the cargo terminal, after what witnesses claimed, a beam fell onto the truck. A part of the highway leading into the passenger terminals partly collapsed onto the road beneath crushing the people running out of the airport below.

Unfortunately during the aftershock, the 31 story "Bank of Despair Tower" in downtown Greenfield collapsed in on itselves. The building was built in 1971 and was one of the tallest building in the city. It was located on the end of the elevated section of downtown, right nexto the bridge connecting central ashfield and downtown, the building had a beautiful view of the city, and the mountains behind.

It collapsed due to a construction error. During the original quake the building stood, but had major destruction in the lobby and parking garage. One of the support beams for the western end of the tower was badly damaged, and collapsed during the aftershock, the northwest corner of the building collapsed, taking the rest of the building with it. The building fell onto the bridge and a few warehouses that stood beside the bridge.

This changed the skyline of the city forever, and many memorialize the building each year on january 17th.

Multiple peices of the highway bridge nexto glenview had collapsed, so did one of the smaller bridges going into ashfield. With almost no way in or out of Glenview the place became a chaotic nightmare. With no lights or police people started looting the stores and homes. A fire started in one of the old 1920s brick buildings and with the heavy winds on the day the fire spread quickly onto nearby homes and apartment buildings. Only 3 firefighters were on duty in the Glenview Fire Department. They tried to help people stuck in and under collapsed buildings, and with many helpful citizens tried to stop the fire to spread, even though the efforts the fire still continued for another 7 hours.

Members of the First-Aid group set up camp on the santa cabeza plaza infront of the library.

The Glenview waterfront was blocked off from the rest of the city, due to the interstate collapsing onto every road into Glenview. The residents of the area came together and set up a first aid camp on the waterfront park, they also made a temporary living setup for residents with houses in bad shape, or without them.

Ashfield central was flooded due to multiple sewerpipes bursting. Many residents evacuated the tall buildings and were brought to the ashfield waterfront by the Ashfield police. The police couldnt reach other areas due to flooding and collapsed infrastructure, so they helped rescue victims of collapsed buildings, and keep ashfield as safe as possible. They set up a large temporary living camp on the grass field in the park, and police evacuated people to get them away from the buildings in case there was another aftershock.

Downtown was a mess, with collapsed infrastructure and heavily damaged buildings it was already very hard to navigate, but with all the toxic fumes and debris that came from the collapsed tower, it became even harder for the police to evacuate people to a save space. Everyone was forced to wear a mask so they wouldnt breath in as much of the toxic air. The citizens were evacuated to three spots in the city, the city hall, the downtown marina and the santa cecilia bay bridge.

A large fire started in Chinatown, burning down atleast 5 buildings before it was put out by the residents of the area.

Ramona, Dawson and other areas near downtown were neglected by emergency services and looters ran around the streets. The ground under one of the houses in Ramona collapsed onto the interstate nexto it. Blocking one of the only still nagivable interstates to downtown. While some streets in Ramona were flooding due to bursted sewer pipes, they still managed to set up a first aid camp on the parking lot of the ramona plaza mall, a large stripmall. Residents came together to help others out of collapsed buildings, and put out fires.

Santa cecilia was partly disconnected so they couldnt get as much help from Downtown emergency services as other areas. Luckily many residents voluntarily made a first aid camp on the beach, and helped others get out of badly damaged buildings.

Los Llanos, Palma and Rio Pueblo were all very badly hit by looters and fires raged in the areas due to emergency services focusing on the airport and downtown. A first aid camp was made near the convention center.

Rockwell was a mess with many residents hurrying out of their houses onto the beach, with lots of rubble in and around the area. An emergency aid camp was set up by the palma police department to resident the victims of the earthquake.

The day after the earthquake.

A lot of infrastructure was either blocked, or collapsed so especially in and around downtown heavy gridlock was in effect, A lot of the main interstates were blocked off by emergency services, so people had to drive through city streets to get away. Santa Cecilia was one of the only places people could easily drive through, however with the mass of traffic going into the small side streets, Santa Cecilia ended up gridlocked aswell, so did Ramona, Dawson Los Llanos, Rio Pueblo, Ashfield, Glenview and Westwood. Many of these were pretty dangerous without power or police supervision. Emergency services started rescues all over the city and took over most of the makeshift first aid camps. Surrounding cities in california sent rescue operations to help with the damage, including LA, San Francisco, And multiple cities in the valley.

With flooded, blocked or collapsed infrastucture, gridlocked traffic and rescue operations going on all over the city the last thing they would want was another aftershock to start.

So at 3:59:19 p.m. PST the second aftershock, almost 12 hours after the first struck. An 6.8 aftershock that lasted for 10-20 seconds struck the city.

not finished