Earthquake with magnitude of ML 1.1 on date 10-07-2021 and time 07:41:42 (Italy) in region 3 km NW Prelà (IM)

A magnitude ML 1.1 earthquake occured in region: 3 km NW Prelà (IM), on

  • 10-07-2021 05:41:42 (UTC)
  • 10-07-2021 07:41:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.949, 7.919 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Prelà IM 3 503 503
Vasia IM 3 389 892
Borgomaro IM 4 865 1757
Aurigo IM 4 347 2104
Lucinasco IM 4 272 2376
Carpasio IM 4 168 2544
Dolcedo IM 5 1415 3959
Chiusavecchia IM 6 577 4536
Caravonica IM 6 282 4818
Montalto Ligure IM 6 377 5195
Chiusanico IM 7 607 5802
Pietrabruna IM 7 501 6303
Badalucco IM 7 1136 7439
Pontedassio IM 8 2323 9762
Cesio IM 8 283 10045
Civezza IM 8 609 10654
Rezzo IM 9 366 11020
Diano Arentino IM 10 722 11742
Castellaro IM 10 1256 12998
Costarainera IM 11 828 13826
Terzorio IM 11 216 14042
Cipressa IM 11 1290 15332
Pompeiana IM 11 823 16155
Pieve di Teco IM 11 1338 17493
Testico SV 11 196 17689
Imperia IM 11 42034 59723
San Lorenzo al Mare IM 11 1297 61020
Vessalico IM 12 282 61302
Diano Castello IM 12 2214 63516
Diano San Pietro IM 12 1145 64661
Molini di Triora IM 12 617 65278
Santo Stefano al Mare IM 12 2197 67475
Riva Ligure IM 13 2910 70385
Stellanello SV 13 808 71193
Taggia IM 13 14116 85309
Borghetto d'Arroscia IM 13 456 85765
Triora IM 13 355 86120
Diano Marina IM 14 5977 92097
Ceriana IM 14 1250 93347
Casanova Lerrone SV 14 749 94096
Pornassio IM 14 685 94781
Villa Faraldi IM 14 444 95225
Ranzo IM 15 557 95782
San Bartolomeo al Mare IM 15 3129 98911
Montegrosso Pian Latte IM 15 118 99029
Armo IM 16 111 99140
Cosio d'Arroscia IM 16 221 99361
Cervo IM 16 1187 100548
Aquila d'Arroscia IM 17 166 100714
Bajardo IM 17 312 101026
Mendatica IM 17 185 101211
Garlenda SV 17 1254 102465
Onzo SV 17 219 102684
Sanremo IM 18 54807 157491
Andora SV 18 7552 165043
Ortovero SV 18 1586 166629
Vendone SV 19 388 167017
Caprauna CN 19 104 167121
Alto CN 19 128 167249
Laigueglia SV 20 1810 169059
Castel Vittorio IM 20 287 169346

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NE of Sanremo (54807 inhabitants)
58 Km SE of Cuneo (56081 inhabitants)
60 Km SW of Savona (61345 inhabitants)
96 Km SW of Genova (586655 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-07-10
05:41:42
43.9493 7.9187 10 2021-07-10
05:51:35
Sala Sismica INGV-Roma 92546901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-10 05:41:42 ± 0.18
Latitude 43.9493 ± 0.0099
Longitude 7.9187 ± 0.0125
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92546901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1250
Semi-minor axis of confidence ellipse (meter) 830
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 145
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.51801
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 92546901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-10 05:51:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.ENR.HHZ. 2021-07-10T05:41:58.64 0.6 undecidable manual S 308 0.4551 50 -0.35 44
GU.CANO.HHZ. 2021-07-10T05:41:55.05 0.6 undecidable manual S 41 0.3444 50 -0.66 41
GU.BURY.HHZ. 2021-07-10T05:41:54.83 3.0 undecidable manual S 0.03 0
GU.GBOS.HHZ. 2021-07-10T05:41:54.08 0.6 undecidable manual S 349 0.2977 50 -0.23 47
GU.STV.HHZ. 2021-07-10T05:41:53.64 0.1 undecidable manual P 305 0.518 50 0.45 85
FR.SAOF.HHZ.00 2021-07-10T05:41:52.83 0.1 undecidable manual S 278 0.2653 50 -0.54 87
GU.ENR.HHZ. 2021-07-10T05:41:52.65 0.3 undecidable manual P 308 0.4551 50 0.52 63
GU.CANO.HHZ. 2021-07-10T05:41:50.72 0.1 undecidable manual P 41 0.3444 50 0.49 87
GU.RORO.HHZ. 2021-07-10T05:41:50.43 0.1 undecidable manual S 33 0.1943 114 -0.54 88
GU.GBOS.HHZ. 2021-07-10T05:41:49.36 0.1 undecidable manual P 349 0.2977 50 -0.06 97
FR.SAOF.HHZ.00 2021-07-10T05:41:48.82 0.1 undecidable manual P 278 0.2653 50 -0.06 97
GU.MGRO.HHZ. 2021-07-10T05:41:48.60 0.1 undecidable manual S 320 0.1223 126 0.05 100
GU.RORO.HHZ. 2021-07-10T05:41:47.81 0.1 undecidable manual P 33 0.1943 114 0.32 93
GU.MGRO.HHZ. 2021-07-10T05:41:46.48 0.1 undecidable manual P 320 0.1223 126 0.39 93
GU.IMI.HHZ. 2021-07-10T05:41:46.06 0.1 undecidable manual S 205 0.0432 154 -0.44 94
GU.IMI.HHZ. 2021-07-10T05:41:45.07 0.1 undecidable manual P 205 0.0432 154 0.16 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.IMI.HHE. ML:1.5 0.000628 0.26 AML other m 2021-07-10T05:41:46.07
GU.IMI.HHN. ML:1.8 0.0011085 0.22 AML other m 2021-07-10T05:41:46.41
GU.MGRO.HHN. ML:1.1 0.000124 0.74 AML other m 2021-07-10T05:41:49.56
GU.MGRO.HHE. ML:1 0.0001088 0.32 AML other m 2021-07-10T05:41:50.25
GU.RORO.HHE. ML:1.1 7.905E-5 0.52 AML other m 2021-07-10T05:41:51.51
GU.RORO.HHN. ML:0.8 4.695E-5 0.86 AML other m 2021-07-10T05:41:51.58
GU.CANO.HHN. ML:1.1 4.285E-5 1 AML other m 2021-07-10T05:41:55.26
GU.ENR.HHN. ML:1.1 3.53E-5 0.68 AML other m 2021-07-10T05:41:59.19
GU.ENR.HHE. ML:0.9 2.19E-5 0.72 AML other m 2021-07-10T05:41:59.44
GU.STV.HHE. ML:1.1 2.735E-5 0.12 AML other m 2021-07-10T05:42:00.75
GU.STV.HHN. ML:0.8 1.39E-5 0.74 AML other m 2021-07-10T05:42:01.18
GU.CANO.HHE. ML:1.3 6.795E-5 0.9 AML other m 2021-07-10T05:42:02.89
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