We also know from the period just prior to the Tribulation, known as the end time, that there will be earthquakes and roaring seas as Jesus describes in Luke 21:25. In Matthew 24:6-7 it describes wars (plural) and we know that wars scar the earth.
Lately there have been an unusual number of unexpected underground failures. Breaks in underground pipes, oil leaks, sinkholes, more sinkholes wreaking havoc in China and Canada, mine shaft collapses, methane explosions at natural gas rigs, and of course the sea floor break under the BP oil well in the Gulf. Many. A lot. There have been so many sinkholes in China that the population is spooked and just a rumor of a sinkhole or an earthquake causes them to sleep outside for the night. The previous two entries have more source news items at the links above.
Here is another example of a sinkhole, again, in China. "June 15, 2010: A resident throws a stone into a sinkhole near Qingquan primary school in Dachegnqiao, China. The hole, 492 feet wide and 164 feet deep, has been growing since it first appeared in January and has destroyed 20 houses so far. No casualties have been reported, and the reason for the appearance of the hole remains unclear. Reuters" source
It is possible that the earth's coming changes have begun. This is what I personally believe. The recent pattern of earth cracks is too noticeable not to wonder this and put the dots together... After all, the earth changes have to begin sometime. Here is another disaster to illustrate the point. In south-central Mexico last night an underground explosion ripped a crack in the earth that was a mile long and twenty feet deep! Note, the headline link is to the original Spanish article. Here's a link to a google translation--
Underground explosion in Mexico damages 400 houses
This afternoon an explosion occurred inside the city dump, which caused damage to at least 400 homes located in 15 streets, Mayor Jesus Tolentino Roman Bojorquez. The mayor explained that the incident could be provided by a combination of methane gas produced by decomposing garbage, and a possible softening of the final disposal site is located in the neighborhood Tlatel Xochitenco. Garbage collectors have even made a crack arising from the explosion which has a length of up to one kilometer, a depth of six to seven meters and two meters wide...
It seems that events are cascading faster and faster and waxing worse and worse. This is also predicted. Jesus said that the end time events would be as birth pangs, and when a woman gives birth the contractions accelerate in potency and pain until the birth of the new life. The guys at Rapture Ready put it this way:
Birth pangs, in terms of Bible Prophecy, refers to certain convulsive geopolitical, geophysical, astrophysical and world-wide socio-economic events and issues scheduled to occur in the time leading up to Jesus Christ's Second Advent (second coming). These are likened to the contractions experienced by a woman about to give birth, with those episodes increasing with frequency and intensity. Jesus' foretelling of these birth pangs use the word "sorrows," in His Olivet Discourse on end time things to come. (Matt. 24:3-8)Now is the time to examine your sins and see them for what they are: rebellion against a Holy God which will result in permanent separation from Him until and unless you accept the remedy for it. Fortunately that remedy is free, because Jesus paid the price for our sins. Justice has been satisfied and you are given a pardon from the High Judge! Jesus is the Way and the Truth and the Life, no one comes to the Father but through Him. (John 14:6). If you are sincerely sorry for your sins and want to apologize to Jesus, and then turn away from your sins, then tell Him! (confess and repent) He will forgive you. He is THAT GOOD!