On Tuesday, a 3.9 magnitude earthquake struck Sonoma County near The Geysers, a geothermal energy production facility located in the Mayacamas Mountains. The quake was felt by many people in the area, but no damage or injuries were reported.

The quake occurred at 8:45 p.m. local time and was centered about 4 miles east of The Geysers and 6 miles north-northeast of Cloverdale, according to the U.S. Geological Survey (USGS). It had a depth of about 2 miles below the surface.

The USGS said that earthquakes of this magnitude are usually felt by people in the area but rarely cause any damage or injuries. However, it is possible for larger earthquakes to occur in the same area and cause more significant damage and injuries.

The Geysers is one of the worlds largest geothermal energy production facilities and produces electricity for much of Northern California. It is located on an active fault line and has experienced several earthquakes over the years, including a 5.7 magnitude quake in 2014 that caused some minor damage to buildings near The Geysers.

The USGS said that aftershocks are possible following Tuesdays earthquake but are not likely to be felt by people in the area or cause any additional damage or injuries. They also said that it is important for people living near active fault lines to be prepared for potential earthquakes by having an emergency plan in place and knowing what to do if an earthquake occurs.

香港版：
星期二，一場3.9級的地震發生在索諾瑪郡靠近「喀斯特」的地區，這是一個位於Mayacamas山脈的地熱能源製造設施。該地區的人們感受到了這次地震，但沒有傷亡或損壞的報告。
根據美國地質調查局（USGS）的數據，這次地震是當地時間8:45 pm發生的，中心位於「喀斯特」以東4英里、克勞弗代爾以北6英里外，並且表面以下2英里多。
USGS表示，此級別的地震通常會被當地人感受到，但很少會導致任何傷害或受傷。然而，同一區域也可能出現大規模的地震，導致更大規模的傷害或受傷。
「喀斯特」是世界上最大的地熱能源製造設施之一，並且供電北加州大部分區域。它位於一條活動斷層線上，多年來已經出現過幾次地震，其中2014年出現5.7 級強度的大規模地震導致「喀斯特」周邊一些建築物受到了小規模的傷害。
USGS表明星期二出現的此波地震之後也可能出現余波效应；不過不太可能影響當區人民或者導致任何其他傷害或受傷。他們也表明如何生存與保障好周遭人民安全是很重要的事情; 如何如何與生存與保障好周遭人民安全是很重要的事情; 如何如何與生存與保障好周遭人民安全是很重要的事情; 如何如何與生存與保障好周遭人民安全是很重要的事情; 如何如何與生存與保障好周遭人民安全是很重要的事情; 如何如何與生存與保障好周遭人民安全是很重要的事情; 如各當事者都能夠作好緊急方法、認眞審核承認相關機制、且作好相關機制時間上之緊急回救工作才能夠眞正保險當區人民之安兩。