The USGS has details of the main quake, and a map of the other nearby quakes and aftershocks (trending northwards, away from San Felipe).

There were reports of it being felt widely in Baja California, southern California as far as Santa Barbara, Arizona as far as Phoenix, Tucson and Bullhead City, and even Las Vegas. Isolated reports from Lake Tahoe, New Mexico, and Utah.

It was a rocking and rolling quake for a good 30 seconds, rather than a short sharp shock. It's the first time I've rushed outside for a quake, very noticeable and very long. Although my vehicle bounced up and down, nothing in the house was damaged, no cracks, nothing fell over. There's a much longer description of how it felt from Randy at Blue Roadrunner.

Little structural damage was reported in San Felipe, but certainly some damage (house pic) (more pics) (road fissure pic) (road) in Mexicali. Also damage in Calexico (photo gallery). It was nothing like that in San Felipe, as it is much further away.

The Telcel mobile phones were down for voice calls in most of San Felipe and the surrounding area. Oddly the GPRS mobile data continued working and 3G mobile internet returned after a couple of hours. At around 8.30pm Sunday the Telcel mobile phones were working again, but with lines very congested you may still find it hard to get through for another day or two.

Movistar mobile phones remained functional, as well as the Telnor landlines (during Sunday evening the Telnor wireless internet failed, it was down until nearly 5pm Tuesday at El Dorado Ranch). Electric remained working in San Felipe, but electric was switched off in most of Mexicali due to numerous downed power lines. Around 95% of the Mexicali power came back on during Monday.

In summary, if you are trying to contact somebody in San Felipe, don't worry. There is minimal (if any) damage here (some have reported cracks on stucco and broken bottles of tequila), but there may be problems with some phones and internet at times.

A comment below (thanks Ti) says there was extensive damage at Rio Hardy, and for a time there was flooding in that area.

There was also major flooding of agricultural land south of Mexicali, with reports on Thursday estimating 60,000 hectares (231 square miles) of crops flooded. 150km of county roads in that area were damaged with some roads still impassible days later, 25-35,000 people affected, 233 injuries. Crop losses of 2-3.5 billion pesos (US$200-300 million) with thousands of families losing their livelihoods, many fleeing the area.

From Michele MacDonald, Director, San Felipe Rotary Foundation: The Rotary Club of San Felipe has sent 2250 bottles of water and is in the process of sending $1000 USD of food and needed supplies to Valle de Mexicali. Ominivision which is the US nationwide hispanic television and radio stations, the State of Baja California and the San Felipe Rotary Foundation have coordinated a major fund raising effort that will be broadcast through out the United States. The PSAs will air starting Monday and will continue for two weeks. Funds raised will be used for the reconstruction of homes affected by the earthquake in Mexicali. We encourage you to make a donation toward this effort. Checks are to be made payable to the San Felipe Rotary Foundation, PO Box 9011, PMB 370, Calexico, CA 92232.

The road from San Felipe to Mexicali was closed late on Sunday night for repairs around La Ventana. It reopened on Monday lunchtime, both northbound and southbound, There is a long dirt detour around km 38 to 49 while the surface is being repaired, allow plenty of time. The may be other short detours.

Before Hwy 5 closed on Sunday night it took some people 6.5 hours to drive from Yuma to San Felipe because of the obstructions in Mexicali and the road heaves.

The downtown Mexicali / Calexico border crossing was closed due to structural damage, but reopened on Tuesday morning.

Photos of the road damage by Kyle Crawford and Doreen Butler are on Kat's Gallery. Some of the shots are Hwy 5, some are Hwy 2, 2D. None of this is near here, latest reports say traffic to San Felipe including trucks and buses is getting through fine.

This report was first published on Sunday 4 April 2010, and was updated several times a day with the latest news until Thursday 8 April 2010.