It will be compulsory, for all, to receive an implant in their right hand or forehead. The Roman Empire will revive under the leadership of Ten rules. This revived Roman Empire will exist for only 7 years. The most evil and destructive man who will ever hold public office. Not mentioned specifically, volcanic eruptions fall into the birth pang theme Matthew described.
Volcanoes have an ecological impact that effects other indicators.
God used earthquakes to show his disapproval with man. I look for more earthquake activity as the return of Christ draws near. The description of the sea and the waves roaring would encompass all cyclonic activity. To have a dictator you must have a shortage of this. The time you least expect your loosing your freedom is when you willingly give it up.