Draw a valid conclusion from the given statements, if possible. Then state whether your conclusion was drawn using the Law of Detachment or the Law of Syllogism. If no valid conclusion can be drawn, write no valid conclusion and explain your reasoning.

Determine whether the stated conclusion is valid based on the given information. If not, write invalid. Explain.
Given: If an earthquake measures a 7.0 or higher on the Richter scale, then it is considered a major earthquake that could cause serious damage. The 1906 San Francisco earthquake measured 8.0 on the Richter scale.
Conclusion: The 1906 San Francisco earthquake was a major earthquake that caused serious damage.