well-capping

In this chapter, a sudden explosion at a well head causes a dangerous ice gusher, prompting an emergency response led by Mary who successfully caps the well. John investigates the incident using station records and surveillance, finding no evidence of recent tampering or sabotage, leading to suspicion that the explosion might have been premeditated but concealed. The chapter ends with John requesting further data on past dowsing expeditions, indicating ongoing concerns about the safety and security of Mars' infrastructure.