Focus vs epicenter; intensity vs magnitude and active vs inactive fault Self Assessment

In general, the shallow-focus earthquakes cause mass destruction than deep-focus earthquakes because the seismic  waves travel at shorter distance from the focus to the surface. Which of the following is NOT true of the focus of an earthquake?

What scale is used to measure the magnitude of an earthquake?

What intensity of the earthquake based on PHIVOLCS intensity scale is slightly felt?

Which of the following pairs of magnitude and general description is NOT true?

At 4:16 AM on27 July 2019, Saturday, a Magnitude 5.4 earthquake shook the Batanes Islands. Its epicenter is located 12 km North of Itbayat, Batanes and originated a depth of 12 km. At 7:37 AM, an earthquake with magnitude 5.9 occurred 21 km North of Itbayat, Batanes at a depth of 7 km. At 9:24, a magnitude 5.8 earthquake occurred, located 11 km North of Itbayat, Batanes with a depth of 11 km. Each event was followed by small-magnitude earthquakes. As of 8:00 PM of 27 July2019, 104 aftershocks have been recorded by the DOST-PHIVOLCS seismic monitoring network. The magnitude 5.4 earthquake generated ground shaking felt at PHIVOLCS earthquake Intensity Scale (PEIS) VI (Very Strong) in Itbayat,Batanes. Intensity III (Weak) was also felt in Basco and Sabtang, Batanes. The larger magnitude 5.9 earthquake generated stronger shaking felt at intensityVII (Destructive) in Itbayat, Batanes, and Intensity IV (Moderately Strong) in Sabtang and Uyugan, Batanes. Both ground shaking events resulted to casualties and damages to buildings and infrastructure near the epicentral area. In addition to the type of building materials used, these earthquake events could have weakened the buildings and structures prior to the M5.9 earthquake event, resulting in greater damage than would have been expected. Prior to the moderated-sized earthquakes on July 27, earthquakes with magnitudes ranging from4.2 to 4.8 occurred from July 22-26, 2019. The maximum reported ground shaking intensity was IV.                                 Where is the epicenter of the earthquake?

At 4:16 AM on27 July 2019, Saturday, a Magnitude 5.4 earthquake shook the Batanes Islands. Its epicenter is located 12 km North of Itbayat, Batanes and originated a depth of 12 km. At 7:37 AM, an earthquake with magnitude 5.9 occurred 21 km North of Itbayat, Batanes at a depth of 7 km. At 9:24, a magnitude 5.8 earthquake occurred, located 11 km North of Itbayat, Batanes with a depth of 11 km. Each event was followed by small-magnitude earthquakes. As of 8:00 PM of 27 July2019, 104 aftershocks have been recorded by the DOST-PHIVOLCS seismic monitoring network. The magnitude 5.4 earthquake generated ground shaking felt at PHIVOLCS earthquake Intensity Scale (PEIS) VI (Very Strong) in Itbayat,Batanes. Intensity III (Weak) was also felt in Basco and Sabtang, Batanes. The larger magnitude 5.9 earthquake generated stronger shaking felt at intensityVII (Destructive) in Itbayat, Batanes, and Intensity IV (Moderately Strong) in Sabtang and Uyugan, Batanes. Both ground shaking events resulted to casualties and damages to buildings and infrastructure near the epicentral area. In addition to the type of building materials used, these earthquake events could have weakened the buildings and structures prior to the M5.9 earthquake event, resulting in greater damage than would have been expected. Prior to the moderated-sized earthquakes on July 27, earthquakes with magnitudes ranging from 4.2 to 4.8 occurred from July 22-26, 2019. The maximum reported ground shaking intensity was IV.                                 What is/are the effects of earthquake on buildings?

___________ is a fault that has NOT moved for more than 10,000 years.

_________________ is a fault that will likely have another displacement or cause an earthquake sometime in the future.

Is there a possibility that an inactive fault becomes an active fault?

Which of the following active faults is nearest Marikina City?