Category Archives: Earthquake

April 2010 Baja Quake – Part 2

In July 2010, I was able to go to Baja California with a friend. Part of our route traversed Federal Highway 2 (Mexico), which suffered some damage from the April 2010 quake. Hwy 2 had been repaired but the adjacent old alignment had not been. I was rather amazed at the amount of offset from this earthquake. I observed about 2′ of horizontal and about 5′ of vertical offset at the highway crossing.

East of the fault, bridge embankments on the Hwy 2 Mexicali Bypass show signs of settling.
East of the fault, bridge embankments on the Hwy 2 Mexicali Bypass show signs of settling.
Offset right of way fence next to Hwy 2.
Offset right of way fence next to Hwy 2.
Old alignment of Hwy 2, now offset by about 2 feet horizontally and 5 feet vertically.
Old alignment of Hwy 2, now offset by about 2 feet horizontally and 5 feet vertically.
Side view of the old alignment showing the vertical offset.
Side view of the old alignment showing the vertical offset.
Breaks in the soil to the north. Two distinct scarps can be noted here.
Breaks in the soil to the north. Two distinct scarps can be noted here.
At the break, the old alignment now has a steep ramp and crack.
At the break, the old alignment now has a steep ramp and crack.

April 2010 Baja Earthquake – Part 1

On April 4, 2010, a 7.2 earthquake struck the northern Baja California and Southern California region. I was in Oceanside at a friends house at the time. Initially, I didn’t feel it and thought the others at the party were joking. We had been talking about the Northridge Earthquake earlier in the day. Once I stepped out onto the patio, I felt the ground moving. I knew it was large but farther away. My first thought was – What just happened to Los Angeles? Instead of Los Angeles, it was the Mexicali/Calexico area that got hit the worst as it was much closer to the epicenter.

Map showing the earthquake and affected area.
Map showing the earthquake and affected area.

Wanting to survey the damage to the roadways in that area and see if any of the old bridges were damaged, I headed out the following weekend. As it was also springtime, parts of the desert were in bloom. The ocotillo in particular had a beautiful display of flowers. To get out there, I followed Hwy 80 out to the Desert View Tower. After talking with Ben, the owner, I headed out to Calexico following Hwy 80 and Hwy 98. I was hoping to see cracks in Hwy 98 from any fault movement but did not find any.

Blooming ocotillo along Hwy 98 in the Yuha Desert.
Blooming ocotillo along Hwy 98 in the Yuha Desert.
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Closeup of the blooms.

In Calexico, many buildings were damaged with a large portion of the older downtown area closed off until the buildings could be stabilized. The biggest damage I saw was at a hotel in the northwestern end of downtown. Parts of the walls and roof had collapsed.

An empty and closed off downtown Calexico.
An empty and closed off downtown Calexico.
Partially collapsed roof and wall in Calexico.
Partially collapsed roof and wall in Calexico.
Damaged Hotel De Anza in Calexico.
Damaged Hotel De Anza in Calexico.
Front of Hotel De Anza showing some damage.
Front of Hotel De Anza showing some damage.
Partially collapsed facade of the Hotel De Anza.
Partially collapsed facade of the Hotel De Anza.

Returning from Calexico, I stopped at a few bridges to see the fill on each side had settled, causing some cracking in the pavement. Additional cracks were spotted at the New River crossing on old US 80. Overall, the highways were lightly damaged with some concrete broken at some bridges.

Typical settlement repair at the Westside Canal bridge on Hwy 98.
Typical settlement repair at the Westside Canal bridge on State 98.
Settled dirt at the edge of the Westside Canal at State 98.
Settled dirt at the edge of the Westside Canal at State 98.
Both sides of the New River trench show settlement on US 80.
Both sides of the New River trench show settlement on US 80.
Cracked pavement on old US 80 at the New River.
Cracked pavement on old US 80 at the New River.
Cracking in pavement and soil from settling at the edge of the New River trench.
Cracking in pavement and soil from settling at the edge of the New River trench.