Earthquake with magnitude of ML 1.1 on date 10-07-2021 and time 10:57:39 (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 08:57:39 (UTC)
  • 10-07-2021 10:57:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.952, 7.925 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 3 865 1757
Lucinasco IM 4 272 2029
Aurigo IM 4 347 2376
Carpasio IM 5 168 2544
Chiusavecchia IM 5 577 3121
Dolcedo IM 5 1415 4536
Caravonica IM 5 282 4818
Chiusanico IM 6 607 5425
Pietrabruna IM 7 501 5926
Montalto Ligure IM 7 377 6303
Pontedassio IM 7 2323 8626
Badalucco IM 7 1136 9762
Cesio IM 8 283 10045
Civezza IM 8 609 10654
Rezzo IM 9 366 11020
Diano Arentino IM 10 722 11742
Testico SV 11 196 11938
Castellaro IM 11 1256 13194
Pieve di Teco IM 11 1338 14532
Costarainera IM 11 828 15360
Cipressa IM 11 1290 16650
Imperia IM 11 42034 58684
Terzorio IM 11 216 58900
Vessalico IM 11 282 59182
San Lorenzo al Mare IM 11 1297 60479
Pompeiana IM 11 823 61302
Diano Castello IM 12 2214 63516
Diano San Pietro IM 12 1145 64661
Stellanello SV 12 808 65469
Borghetto d'Arroscia IM 13 456 65925
Molini di Triora IM 13 617 66542
Santo Stefano al Mare IM 13 2197 68739
Riva Ligure IM 13 2910 71649
Taggia IM 13 14116 85765
Diano Marina IM 13 5977 91742
Casanova Lerrone SV 13 749 92491
Villa Faraldi IM 14 444 92935
Triora IM 14 355 93290
Pornassio IM 14 685 93975
Ranzo IM 14 557 94532
Ceriana IM 14 1250 95782
San Bartolomeo al Mare IM 15 3129 98911
Armo IM 15 111 99022
Cervo IM 16 1187 100209
Montegrosso Pian Latte IM 16 118 100327
Cosio d'Arroscia IM 16 221 100548
Aquila d'Arroscia IM 16 166 100714
Garlenda SV 17 1254 101968
Onzo SV 17 219 102187
Mendatica IM 17 185 102372
Andora SV 17 7552 109924
Bajardo IM 17 312 110236
Ortovero SV 18 1586 111822
Sanremo IM 18 54807 166629
Vendone SV 18 388 167017
Caprauna CN 19 104 167121
Alto CN 19 128 167249
Laigueglia SV 19 1810 169059

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)
95 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
08:57:39
43.9515 7.9253 10 2021-07-10
09:01:47
Sala Sismica INGV-Roma 92553451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-10 08:57:39 ± 0.18
Latitude 43.9515 ± 0.0090
Longitude 7.9253 ± 0.0112
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 92553451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1127
Semi-minor axis of confidence ellipse (meter) 752
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) 1130
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.52071
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 92553451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-10 09:01:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.STV.HHZ. 2021-07-10T08:57:57.46 0.6 undecidable manual S 305 0.5207 50 -0.4 59
IV.QLNO.HHZ. 2021-07-10T08:57:56.40 0.6 undecidable manual S 39 0.4793 50 -0.24 61
GU.ENR.HHZ. 2021-07-10T08:57:56.00 0.6 undecidable manual S 308 0.4578 50 -0.01 64
GU.BURY.HHZ. 2021-07-10T08:57:51.62 0.3 undecidable manual S 238 0.3148 50 -0.14 97
GU.CANO.HHZ. 2021-07-10T08:57:51.89 0.3 undecidable manual S 41 0.3399 50 -0.62 85
IV.QLNO.HHZ. 2021-07-10T08:57:50.13 0.6 undecidable manual P 39 0.4793 50 0.63 55
GU.STV.HHZ. 2021-07-10T08:57:50.62 0.3 negative manual P 305 0.5207 50 0.41 88
GU.ENR.HHZ. 2021-07-10T08:57:49.70 0.6 negative manual P 308 0.4578 50 0.56 57
FR.SAOF.HHZ.00 2021-07-10T08:57:49.87 0.6 undecidable manual S 277 0.2698 50 -0.57 59
GU.BURY.HHZ. 2021-07-10T08:57:47.25 0.6 undecidable manual P 238 0.3148 50 0.56 58
GU.CANO.HHZ. 2021-07-10T08:57:47.66 1.0 positive manual P 41 0.3399 50 0.54 29
GU.GBOS.HHZ. 2021-07-10T08:57:46.57 1.0 undecidable manual P 348 0.2959 50 0.2 32
GU.MGRO.HHZ. 2021-07-10T08:57:45.50 0.3 undecidable manual S 317 0.1241 126 -0.16 100
FR.SAOF.HHZ.00 2021-07-10T08:57:45.88 1.0 undecidable manual P 277 0.2698 50 -0.04 33
GU.MGRO.HHZ. 2021-07-10T08:57:43.52 0.3 undecidable manual P 317 0.1241 126 0.36 96
GU.IMI.HHZ. 2021-07-10T08:57:42.07 0.6 undecidable manual P 210 0.0468 152 0.06 69
GU.IMI.HHZ. 2021-07-10T08:57:42.99 0.6 undecidable manual S 210 0.0468 152 -0.68 59
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MGRO.HHN. ML:1.2 0.0001585 0.74 AML other m 2021-07-10T08:57:46.52
GU.MGRO.HHE. ML:1.2 0.000155 0.34 AML other m 2021-07-10T08:57:47.07
FR.SAOF.HHE.00 ML:0.8 2.825E-5 0.76 AML other m 2021-07-10T08:57:52.02
GU.CANO.HHE. ML:1.4 8.35E-5 0.78 AML other m 2021-07-10T08:57:52.29
GU.CANO.HHN. ML:1.2 6.0E-5 0.7 AML other m 2021-07-10T08:57:52.44
FR.SAOF.HHN.00 ML:0.8 3.105E-5 0.92 AML other m 2021-07-10T08:57:55.46
GU.ENR.HHN. ML:1.2 4.49E-5 1.02 AML other m 2021-07-10T08:57:56.15
GU.ENR.HHE. ML:1.1 3.02E-5 1.02 AML other m 2021-07-10T08:57:56.66
GU.STV.HHE. ML:1.2 3.59E-5 0.12 AML other m 2021-07-10T08:57:57.71
GU.STV.HHN. ML:1 1.865E-5 1.52 AML other m 2021-07-10T08:57:58.14
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