Earthquake with magnitude of ML 1.6 on date 26-10-2020 and time 18:06:00 (Italy) in region Costa Ligure Occidentale (Imperia)

A magnitude ML 1.6 earthquake occured in region: Costa Ligure Occidentale (Imperia), on

  • 26-10-2020 17:06:00 (UTC)
  • 26-10-2020 18:06:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.78, 7.937 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Santo Stefano al Mare IM 7 2197 2197
Riva Ligure IM 8 2910 5107
Cipressa IM 8 1290 6397
Costarainera IM 8 828 7225
San Lorenzo al Mare IM 9 1297 8522
Terzorio IM 9 216 8738
Pompeiana IM 9 823 9561
Taggia IM 10 14116 23677
Castellaro IM 11 1256 24933
Civezza IM 11 609 25542
Pietrabruna IM 13 501 26043
Sanremo IM 13 54807 80850
Imperia IM 14 42034 122884
Dolcedo IM 14 1415 124299
PrelĂ  IM 16 503 124802
Badalucco IM 17 1136 125938
Vasia IM 17 389 126327
Ceriana IM 17 1250 127577
Ospedaletti IM 18 3367 130944
Montalto Ligure IM 18 377 131321
Diano Marina IM 19 5977 137298
Pontedassio IM 19 2323 139621
Diano Castello IM 19 2214 141835
Diano San Pietro IM 20 1145 142980

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Sanremo (54807 inhabitants)
73 Km SW of Savona (61345 inhabitants)
75 Km SE of Cuneo (56081 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.6 2020-10-26
17:06:00
43.78 7.937 11 2021-02-26
14:56:18
Bollettino Sismico Italiano INGV 86934201
Reviewed
Rev100
ML 1.5 2020-10-26
17:06:01
43.79 7.9353 11 2020-10-26
17:11:34
Sala Sismica INGV-Roma 84160311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-26 17:06:00 ± 0.12
Latitude 43.7800 ± 0.0108
Longitude 7.9370 ± 0.0050
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86934201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1220
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 1220
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 244
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.134
Epicentral distance of station farthest from the epicenter (degree) 1.16013
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 86934201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-08 11:33:49

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 84160311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-26 17:11:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.BHB.HHZ. 2020-10-26T17:06:22.49 0.6 undecidable manual P 336 1.1601 90 0.64 45
GU.GBOS.HHZ. 2020-10-26T17:06:16.85 0.3 undecidable manual S 351 0.4667 90 -0.04 95
GU.STV.HHZ. 2020-10-26T17:06:13.15 0.6 undecidable manual P 317 0.6394 90 0.18 58
GU.RORO.HHZ. 2020-10-26T17:06:12.77 0.3 undecidable manual S 16 0.3453 90 -0.52 88
GU.ENR.HHZ. 2020-10-26T17:06:12.30 0.6 undecidable manual P 320 0.5837 90 0.28 58
GU.BURY.HHE. 2020-10-26T17:06:11.11 0.3 undecidable manual S 271 0.2743 90 -0.08 98
GU.GBOS.HHZ. 2020-10-26T17:06:10.02 0.3 undecidable manual P 351 0.4667 90 0.01 94
GU.CANO.HHZ. 2020-10-26T17:06:09.97 0.6 undecidable manual P 27 0.4784 90 -0.25 61
GU.BURY.HHE. 2020-10-26T17:06:07.27 0.3 undecidable manual P 271 0.2743 90 0.55 85
GU.RORO.HHZ. 2020-10-26T17:06:07.68 0.3 undecidable manual P 16 0.3453 90 -0.25 93
IV.IMI.HHZ. 2020-10-26T17:06:07.16 0.6 undecidable manual S 346 0.134 90 0.12 65
IV.IMI.HHZ. 2020-10-26T17:06:04.20 0.3 undecidable manual P 346 0.134 90 -0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IMI.HHE. ML:1.5 0.00031094645 0.0896 AML other m 2020-10-26T17:06:07.30
IV.IMI.HHN. ML:1.8 0.00056901785 0.0896 AML other m 2020-10-26T17:06:07.35
GU.RORO.HHN. ML:1.6 0.000138941995 0.0896 AML other m 2020-10-26T17:06:16.28
GU.GBOS.HHE. ML:1.3 5.0261154E-5 0.256 AML other m 2020-10-26T17:06:17.53
GU.ENR.HHN. ML:1.6 7.478829E-5 0.1024 AML other m 2020-10-26T17:06:23.81
GU.STV.HHE. ML:1.5 5.627467E-5 0.128 AML other m 2020-10-26T17:06:24.65
GU.ENR.HHE. ML:1.4 5.1250935E-5 0.064 AML other m 2020-10-26T17:06:24.84
GU.STV.HHN. ML:1.6 6.3204295E-5 0.1408 AML other m 2020-10-26T17:06:25.35
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download