M1.9 Earthquake near Evansville, Alaska — 23 March 2026
A micro earthquake of magnitude 1.9 was recorded near Evansville, Alaska on , with an epicentre 59 km east-southeast of Evansville, at a focal depth of 539.4 km.
Time (UTC): 2026-03-23 11:18:57
Time (your timezone): —
Magnitude: 1.9 (micro)
Focal depth: 539.4 km (deep)
Epicentre: 66.6570, -150.3450
Location: 59 km ESE of Evansville, Alaska
USGS link to NOAA tsunami information: Not linked
Review status: Automatic
Source: USGS event page
How strong was this earthquake?
Micro earthquakes are almost never felt at the surface and are recorded only by seismographs.
A magnitude 1.9 earthquake radiates roughly 11 kg of TNT equivalent in seismic energy.
The USGS assigns this earthquake a significance score of 56, which is below the USGS threshold of more than 600 for its significant-earthquake list. The ranking combines magnitude with available Did You Feel It responses and PAGER alert level; it is not a direct measurement of damage.
Where was the epicentre?
The epicentre was located at 66.6570, -150.3450 — 59 km east-southeast of Evansville. The closest other recorded event was a magnitude 1.9 earthquake 12 km southwest of here on 17 May 2026.
Why the 539 km depth matters
At 539 km this was a deep-focus earthquake, occurring well inside the subducting slab rather than in the crust. Deep events are rarely damaging even at large magnitudes, though they can be felt over very long distances.
This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, events this small are usually detected by instruments rather than people. Its deep focus normally weakens surface shaking while spreading perceptible motion over a broad area.
What does the tsunami information flag mean?
The USGS record does not carry a link to NOAA tsunami information. That field is not an all-clear and does not state whether a tsunami occurred. In this case, a damaging tsunami would be less likely because at M1.9 it falls below the magnitude 6.5 threshold that generally applies before a submarine earthquake displaces enough water to generate a damaging tsunami; its 539 km focal depth is too great to deform the sea floor significantly; it occurred inland rather than beneath the sea floor. For an active coastal alert, use tsunami.gov or your local warning authority.
How earthquakes generate tsunamis, and what the alert levels mean →
Aftershocks and local seismic history
3 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 1.8.
1 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 4.1 event near Four Mile Road on 20 August 2025. This M1.9 event released about 1,995 times less energy than that event.
How long aftershock sequences last, and how large they get →
Where this event sits in the record
This earthquake is part of the March 2026 worldwide record. Browse the full monthly archive to compare periods.
Nearest recorded earthquakes to this epicentre
- M1.9 earthquake near Bettles, Alaska — (12 km SW)
- M1.2 earthquake near Stevens Village, Alaska — (45 km SSE)
- M1.5 earthquake near Stevens Village, Alaska — (45 km SSE)
- M2.0 earthquake near Stevens Village, Alaska — (47 km SSE)
- M1.4 earthquake near Stevens Village, Alaska — (49 km SSE)
- M1.5 earthquake near Stevens Village, Alaska — (51 km SSE)
- M1.6 earthquake near Stevens Village, Alaska — (56 km SSE)
- M2.0 earthquake near Stevens Village, Alaska — (58 km S)
- M1.8 earthquake near Stevens Village, Alaska — (59 km S)
- M2.8 earthquake near Stevens Village, Alaska — (66 km S)
Other magnitude 1 earthquakes worldwide
- M1.7 earthquake near Toyah, Texas —
- M1.7 earthquake near Redwood Valley, CA —
- M1.7 earthquake near Petersville, Alaska —
- M1.9 earthquake near Progreso, B.C., MX —
- M1.6 earthquake near Petersville, Alaska —
- M1.9 earthquake near Mina, Nevada —
- M2.0 earthquake near Pearsall, Texas —
- M2.0 earthquake near Progreso, B.C., MX —
Questions about this earthquake
How strong is a magnitude 1.9 earthquake?
Micro earthquakes are almost never felt at the surface and are recorded only by seismographs. A magnitude 1.9 earthquake radiates roughly 11 kg of TNT equivalent in seismic energy.
How deep was the earthquake near Evansville?
At 539 km this was a deep-focus earthquake, occurring well inside the subducting slab rather than in the crust. Deep events are rarely damaging even at large magnitudes, though they can be felt over very long distances.
Was the M1.9 earthquake near Evansville felt?
This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, events this small are usually detected by instruments rather than people. Its deep focus normally weakens surface shaking while spreading perceptible motion over a broad area.
What does the USGS tsunami field mean for this event?
The USGS record does not carry a link to NOAA tsunami information. That field is not an all-clear and does not state whether a tsunami occurred. In this case, a damaging tsunami would be less likely because at M1.9 it falls below the magnitude 6.5 threshold that generally applies before a submarine earthquake displaces enough water to generate a damaging tsunami; its 539 km focal depth is too great to deform the sea floor significantly; it occurred inland rather than beneath the sea floor. For an active coastal alert, use tsunami.gov or your local warning authority.
Have there been aftershocks?
3 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 1.8.
How often do earthquakes happen near Evansville?
1 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 4.1 event near Four Mile Road on 20 August 2025. This M1.9 event released about 1,995 times less energy than that event.