Written by on . Last updated July 18th, 2024.

In the evening of Saturday July 6th, 2024, a shallow Magnitude 4.1 earthquake hit under land 28 miles from Hilo in The United States. Shaking may have been felt by a total of 290 thousand people.

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Earthquake Summary

The earthquake struck on land in The United States, 28 miles (45 km) south of Hilo in Hawaii. The center of this earthquake had a very shallow depth of 4 km. Shallow earthquakes usually have a larger impact than earthquakes deep in the earth.

Date and Time: Jul 6, 2024 08:47PM (Honolulu Time)
- Jul 7, 2024 06:47 Universal Time.
Location: 28 mi south of Hilo, Hawaii, The United States.
Coordinates 19°19'46"N 155°7'8"W.
Map: Map of area around epicenter.
Map of area around epicenter. Click to open in Google Maps.
Magnitude: MAG 4.1
Detected by 29 stations. Maximum Error Range ±0.099 .
Depth: 4 mi (7 km)
A very shallow depth.
Max. Intensity:
VI
Strong

On the Modified Mercalli Scale.
Tsunami Risk: Tsunami very unlikely
While this was a shallow earthquake in a coastal area, it appears to have occurred under land (2 mi from the sea) with a magnitude that is usually not strong enough to cause tsunami's.
Always stay cautious - More info here.

Minimal impact predicted

Based on scientific estimates by the US Geographic Survey (USGS), the risk of high fatalities for this earthquake is classified at level GREEN (low). They expect an 69% likelyhood of between 0 and 1 fatalities, and a 98% chance that the number of fatalities falls no higher than 10.

The USGS classifies the economic impact of this earthquake at level GREEN (low). They expect an 65% likelyhood of between 0 and 1 million US Dollars in economic damage and impact, and a 96% chance that the economic impact of this earthquake falls no higher than 10 million USD.

Roughly 290 thousand people exposed to shaking

An estimated 290 thousand have been exposed to shaking (An MMI or Modified Mercalli Intensity level II or higher) as a result of this earthquake according scientific estimates published by the USGS.

The highest earthquake impact level for this earthquake is IV, which corresponds with light shaking and likely no damage. Roughly 4,140 people are expected to be exposed to this level. Intensity level II was experienced by a large group of people (around 180 thousand). In their region, very weak shaking and no damage can be expected.

People MMI Level Shaking Damage
68,500
I
Not noticable None
175,300
II
Very weak None
113,100
III
Weak Probably none
4,140
IV
Light Likely none
0
V
Moderate Very light
0
VI
Strong Light
0
VII
Very Strong Moderate
0
VIII
Severe Moderate to heavy
0
IX
Violent Heavy
0
X
Extreme Very heavy

Nearby towns and cities

This earthquake may have been felt in The United States . Hilo in Hawaii, The United States is the nearest significant place from the epicenter. The earthquake occurred 28 miles (45 km) south of Hilo. The intensity of shaking and damage in Hilo is estimated to be around level III on the Modified Mercalli Intensity scale (weak shaking, probably no damage).

A complete list of nearby places is included below. Estimated intensity data (MMI) sourced from a shake-map published by the US Geographic Survey is shown where available (cities without data probably experienced little impact).

Overview of nearby places

Distance Place Intensity (MMI)
28 mi (45 km)
N from epicenter
Hilo

Hawaii, The United States.
III
Weak
131 mi (211 km)
NW from epicenter
KÄ«hei

Hawaii, The United States.
II
Weak
139 mi (224 km)
NW from epicenter
Kahului

Hawaii, The United States.
II
Weak
140 mi (226 km)
NW from epicenter
Wailuku

Hawaii, The United States.
I
Not felt
Cities and Towns around the epicenter of this earthquake.

Earthquake Intensity Map

The maximum intensity (MMI Scale) caused by this earthquake is V. The map below shows in which areas this earthquake was the most and least impactful. It is based on data from the US Geographic Survey.

I Not felt
II Weak
III Weak
IV Light
V Moderate
VI Strong
VII Very Strong
VIII Severe
IX Violent
X Extreme
Earthquake Intensity Map based on Shakemap Data provided by USGS.

15 Aftershocks detected

Since this main shock, 15 smaller aftershocks were detected. A 3.4 magnitude earthquake hit 2 days later 25 mi (41 km) west-southwest of this earthquake.

In the days before this main shock, 5 smaller foreshocks were detected. Nearby this earthquake a foreshock struck 3 days earlier. It measured a magnitude of 2.7

Overview of foreshocks and aftershocks

Classification Magnitude When Where
Foreshock M 2.7 3 days earlier
Jul 4, 2024 12:59AM (Honolulu Time)
9 mi (14 km)
WNW from Main Shock.
Foreshock M 2.6 3 days earlier
Jul 4, 2024 02:17AM (Honolulu Time)
27 mi (43 km)
WSW from Main Shock.
Foreshock M 2.6 2 days earlier
Jul 4, 2024 07:48PM (Honolulu Time)
27 mi (44 km)
WSW from Main Shock.
Foreshock M 2.6 1 day earlier
Jul 5, 2024 12:32PM (Honolulu Time)
25 mi (41 km)
WSW from Main Shock.
Foreshock M 2.5 1 day earlier
Jul 5, 2024 12:32PM (Honolulu Time)
26 mi (41 km)
WSW from Main Shock.
Main Shock
This Earthquake
M 4.1 Jul 6, 2024 08:47PM
(Honolulu Time)
-
Aftershock M 3.3 4 mins later
Jul 6, 2024 08:51PM (Honolulu Time)
0.4 mi (0.6 km)
WNW from Main Shock.
Aftershock M 2.6 6 mins later
Jul 6, 2024 08:53PM (Honolulu Time)
0.5 mi (0.8 km)
WSW from Main Shock.
Aftershock M 2.8 10 hrs later
Jul 7, 2024 06:56AM (Honolulu Time)
11 mi (18 km)
WNW from Main Shock.
Aftershock M 2.7 16 hrs later
Jul 7, 2024 12:46PM (Honolulu Time)
9 mi (14 km)
WNW from Main Shock.
Aftershock M 3.4 2 days later
Jul 8, 2024 12:39PM (Honolulu Time)
25 mi (41 km)
WSW from Main Shock.
Aftershock M 2.5 2 days later
Jul 8, 2024 02:53PM (Honolulu Time)
9 mi (15 km)
WNW from Main Shock.
Aftershock M 2.7 2 days later
Jul 8, 2024 02:57PM (Honolulu Time)
9 mi (14 km)
WNW from Main Shock.
Aftershock M 2.8 2 days later
Jul 8, 2024 02:58PM (Honolulu Time)
9 mi (14 km)
WNW from Main Shock.
Aftershock M 2.6 2 days later
Jul 8, 2024 08:26PM (Honolulu Time)
9 mi (15 km)
WNW from Main Shock.
Aftershock M 2.7 2 days later
Jul 8, 2024 08:38PM (Honolulu Time)
7 mi (11 km)
WNW from Main Shock.
Aftershock M 2.6 2 days later
Jul 8, 2024 08:39PM (Honolulu Time)
7 mi (11 km)
WNW from Main Shock.
Aftershock M 3.2 2 days later
Jul 8, 2024 11:19PM (Honolulu Time)
9 mi (15 km)
WNW from Main Shock.
Aftershock M 2.7 2 days later
Jul 9, 2024 08:16AM (Honolulu Time)
54 mi (88 km)
NNW from Main Shock.
Aftershock M 2.5 3 days later
Jul 9, 2024 10:02AM (Honolulu Time)
11 mi (18 km)
WNW from Main Shock.
Aftershock M 2.8 3 days later
Jul 9, 2024 12:56PM (Honolulu Time)
9 mi (15 km)
WNW from Main Shock.
Detected MAG2.5+ earthquakes within within 100km (62 mi), that occurred in the three days before and after the main shock.

More earthquakes coming?

The risk of aftershocks decreases rapidly over time. Usually, aftershocks are at least one order of magnitude lower than a main shock.

The chance that a significant earthquake like this one is followed by an even larger earthquake is not so large. On average, scientists estimate a 94% chance that a major earthquake will not be followed by an even larger one. It is still adviced to be aware of this risk

Read: How to Stay Safe during an Earthquake (cdc.gov).

Earthquakes like this happen often in the region

Earthquakes of this strength are very common in the region. This is the strongest earthquake to hit since February 9th, 2024, when a 5.7 magnitude earthquake hit 26 mi (42 km) further west-southwest. An even stronger magnitude 6.9 earthquake struck on May 4th, 2018.

In total, 150 earthquakes with a magnitude of 4.1 or higher have been registered within 300km (186 mi) of this epicenter in the past 10 years. This comes down to an average of once every 24 days.

Tsunami very unlikely

DISCLAIMER: We strongly suggest to closely monitor advice from local authorities with regards to tsunami risks. Our analysis is based on automatically collected data from external sources, and these might contain mistakes. In addition, earthquakes can cause landslides that may lead to a tsunami, or be a followed by another, potentially stonger, earthquake.

While MAG-6.5+ earthquakes may cause tsunami's, it appears that the epicenter of this earthquake hit under land. In addition, the reported depth is deeper than 100km, making the risk of a tsunami even less likely. However always stay cautious and monitor advice from local authorities.

Tsunami Risk Factors

Factor Under Sea? MAG-6.5 or stronger? Shallow depth?
Explanation Almost all tsunami's are caused by earthquakes with their epicenter under sea or very near the sea. However stay cautious in coastal areas as earthquakes on land may cause landslides into sea, potentially still causing a local tsunami. Under MAG 6.5: Very unlikely to cause a tsunami.
MAG 6.5 to 7.5: Destructive tsunami's do occur, but are uncommon. Likely to observe small sea level changes.
MAG 7.6+: Earthquakes with these magnitudes might produce destructive tsunami's.
Most destructive tsunami's are caused by shallow earthquakes with a depth between 0 and 100km under the surface of the earth. Deeper tsunami's are unlikely to displace to ocean floor.
This Earthquake This earthquake appears to have struck on land near a coastal area (2 mi from the sea). Not this earthquake.
This earthquake had a magnitude of 4.1. Earthquakes of this strength are unlikely to trigger a tsunami.
This earthquake occurred at a depth of of 4 mi (7 km). Earthquakes this shallow could trigger a tsunami.

Sources

Last updated 18/07/24 01:38 (). This article is automatically generated based on available data. We keep checking multiple sources for additional information. This article gets updated as new details on this earthquake become available.

  1. US Geographic Society (USGS): Earthquake hv74319421
  2. European-Mediterranean Seismological Centre (EMSC): Earthquake 20240707_0000066
  3. Geonames.org: World Cities Database
  4. Google Maps: Static API
  5. Earthquakelist.org: Historic Earthquakes Database

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