The 2006 Hawaii earthquake was an offshore earthquake occurring 10 km (6 miles) southwest from Puakō, Hawai'i, United States, on Sunday October 15 2006 at 7:07:49 AM local time (17:07:49 (UTC)). It measured 6.7 on the Richter scale, and was located at , at a depth of 38.9 km (24.2 miles). It produced several aftershocks, including one that measured a magnitude of 6.0 seven minutes after the main shock. The Pacific Tsunami Warning Center measured a four-inch tsunami on the coast of the Big Island.
Modified Mercalli Intensity was measured at Force VII-VIII on the western side of the island of Hawaii, and Force VI on eastern Maui. Force V shaking intensity was felt all the way to Oahu, where patches of moderate damage were reported.
The largest and most luxurious hotels on the Island of Hawaii also happened to be clustered within ten miles of the earthquake's epicenter along the Kohala coast. The famous Mauna Kea Beach Hotel had its entire south end collapse, and the hotel's top floor was considered "destroyed." The hotel closed December 1 after a month-long inspection revealed that the building was unsafe and in danger of collapse. The hotel has been shut down indefinitely. The Hapuna Prince Hotel was temporarily evacuated after the earthquake due to structural damage, broken glass and flooding caused by broken waterpipes.
Many roads and bridges collapsed or had deep cracks, and clean-up crews had to work for days to remove debris from the countless landslides. Famous landmarks on the island were greatly affected. The Kalahikiola Congregational Church in Kohala was destroyed due to the collapse of the church's stone walls; the famous Hawi smoke stack, a relic of the old sugarcane trade, completely collapsed as well. The Hulihee Palace in Kailua Kona suffered extensive structural damage. Another famous tourist area, Kealakekua Bay, home of the famous white monument to Capt. James Cook, was swept over by massive landslides that caused the entire bay and its surrounding areas to momentarily disappear in a thick cloud of brown dust.
After the earthquake, the owners of the Kohala Ditch - the Surety Kohala Corporation - finished an evaluation of the damage to, and future safety of, the “Ditch”. They determined that they could not repair the ditch to allow the flumin' the ditch tours to continue safely; the tours have been discontinued. Over 150,000 people in the 10 years prior had enjoyed this 22-mile kayaking tour down old irrigation ditches.