Question

Earthquake intensity is measured by the Richter scale. The formula for the Richter rating of an
earthquake is given by = log( /0), where 0
is the “threshold quake”, or movement that can barely
be detected and the intensity is given in terms of multiples of that threshold.

A seismograph in your neighborhood records an event where = 9890.

Find the Richter rating for this event. Given that a heavy truck rumbling by can cause a microquake with a Richter
rating of 3.5 and “moderate” quakes have a Richter rating of four or more, what was the likely event that occurred
in your neighborhood?

Answer 1

Answer:

ʜᴜᴍɪᴅ ᴀʀᴇᴀs. ʜɪɢʜ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ɪɴ ᴛʜɪs ᴀʀᴇᴀs ᴄᴀᴜsᴇ ʜᴏᴛ ʜᴜᴍɪᴅ (ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴠᴀᴘᴏᴜʀs) ᴀɪʀ ᴛᴏ ʀɪsᴇ ᴜᴘ. sᴏ, sᴛʀᴏɴɢ ᴜᴘᴡᴀʀᴅ ʀɪsɪɴɢ ᴡɪɴᴅs ᴡɪᴛʜ ᴡᴀᴛᴇʀ ᴅʀᴏᴘʟᴇᴛs ᴀʀᴇ ɢᴇɴᴇʀᴀᴛᴇᴅ. ... ᴜᴘᴡᴀʀᴅ ᴍᴏᴠᴇᴍᴇɴᴛ ᴏғ ᴀɪʀ ᴀɴᴅ ᴅᴏᴡɴᴡᴀʀᴅ ᴍᴏᴠᴇᴍᴇɴᴛ ᴏғ ᴡᴀᴛᴇʀ ᴅʀᴏᴘs, ᴛᴏɢᴇᴛʜᴇʀ, ᴄᴀᴜsᴇ ʟɪɢʜᴛɴɪɴɢ ᴀɴᴅ sᴏᴜɴᴅ.