Earthquake with magnitude of ML 0.9 on date 03-09-2021 and time 05:46:27 (Italy) in region 6 km SE Frabosa Soprana (CN)

A magnitude ML 0.9 earthquake occured in region: 6 km SE Frabosa Soprana (CN), on

  • 03-09-2021 03:46:27 (UTC)
  • 03-09-2021 05:46:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.241, 7.829 at 11 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
Frabosa Soprana CN 6 759 759
Frabosa Sottana CN 7 1497 2256
Pamparato CN 8 302 2558
Roburent CN 9 495 3053
Montaldo di Mondovì CN 9 557 3610
Roccaforte Mondovì CN 11 2085 5695
Monastero di Vasco CN 11 1297 6992
Ormea CN 12 1617 8609
Viola CN 12 391 9000
Villanova Mondovì CN 13 5792 14792
Monasterolo Casotto CN 14 89 14881
Torre Mondovì CN 14 498 15379
Lisio CN 14 201 15580
Chiusa di Pesio CN 15 3676 19256
Vicoforte CN 15 3136 22392
Priola CN 16 701 23093
Scagnello CN 16 194 23287
Mondovì CN 16 22484 45771
San Michele Mondovì CN 17 2003 47774
Garessio CN 17 3244 51018
Battifollo CN 17 219 51237
Caprauna CN 17 104 51341
Pianfei CN 17 2202 53543
Briaglia CN 18 318 53861
Mombasiglio CN 18 609 54470
Cosio d'Arroscia IM 18 221 54691
Armo IM 18 111 54802
Mendatica IM 18 185 54987
Bagnasco CN 19 1035 56022
Briga Alta CN 19 39 56061
Pornassio IM 19 685 56746
Montegrosso Pian Latte IM 19 118 56864
Peveragno CN 20 5543 62407

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SE of Cuneo (56081 inhabitants)
47 Km N of Sanremo (54807 inhabitants)
53 Km W of Savona (61345 inhabitants)
79 Km SW of Asti (76202 inhabitants)
85 Km S of Moncalieri (57294 inhabitants)
90 Km W of Genova (586655 inhabitants)
93 Km S of Torino (890529 inhabitants)
97 Km SW of Alessandria (93943 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-09-03
03:46:27
44.2408 7.8287 11 2021-09-03
03:54:46
Sala Sismica INGV-Roma 94982401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-03 03:46:27 ± 0.12
Latitude 44.2408 ± 0.0117
Longitude 7.8287 ± 0.0100
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94982401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1359
Semi-minor axis of confidence ellipse (meter) 723
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 1360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00809
Epicentral distance of station farthest from the epicenter (degree) 0.71766
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:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 94982401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-03 03:54:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.BHB.HHE. 2021-09-03T03:46:41.70 0.3 undecidable manual P 326 0.7177 50 0.33 62
GU.STV.HHE. 2021-09-03T03:46:40.22 0.1 undecidable manual S 271 0.3597 50 -0.6 83
GU.PZZ.HHE. 2021-09-03T03:46:39.38 0.6 undecidable manual P 298 0.5747 50 0.46 42
GU.PCP.HHZ. 2021-09-03T03:46:39.56 0.6 undecidable manual P 59 0.5936 50 0.32 43
GU.ENR.HHZ. 2021-09-03T03:46:38.37 0.6 undecidable manual S 268 0.2941 50 -0.5 44
GU.CANO.HHZ. 2021-09-03T03:46:38.07 0.6 undecidable manual S 96 0.2941 50 -0.81 39
GU.RORO.HHZ. 2021-09-03T03:46:36.01 0.6 undecidable manual S 127 0.2131 50 -0.47 45
GU.MGRO.HHZ. 2021-09-03T03:46:36.33 0.6 undecidable manual S 184 0.1988 50 0.29 47
GU.STV.HHE. 2021-09-03T03:46:35.53 0.1 undecidable manual P 271 0.3597 50 0.28 90
GU.ENR.HHZ. 2021-09-03T03:46:34.15 0.3 positive manual P 268 0.2941 50 0.03 72
GU.CANO.HHZ. 2021-09-03T03:46:34.24 0.1 positive manual P 96 0.2941 50 0.11 95
GU.MGRO.HHZ. 2021-09-03T03:46:32.88 0.1 undecidable manual P 184 0.1988 50 0.39 91
GU.RORO.HHZ. 2021-09-03T03:46:32.82 1.0 undecidable manual P 127 0.2131 50 0.08 24
GU.GBOS.HHZ. 2021-09-03T03:46:31.08 0.1 undecidable manual S 85 0.0081 175 -0.31 96
GU.GBOS.HHZ. 2021-09-03T03:46:29.93 0.1 undecidable manual P 85 0.0081 175 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHE. ML:0.8 2.94E-5 0.58 AML other m 2021-09-03T03:46:38.91
GU.ENR.HHN. ML:1.1 6.15E-5 1.14 AML other m 2021-09-03T03:46:39.85
GU.GBOS.HHE. ML:0.9 0.0001422717 0.16 AML other m 2021-09-03T03:46:31.11
GU.GBOS.HHN. ML:1.1 0.0001987397 0.1408 AML other m 2021-09-03T03:46:31.09
GU.MGRO.HHE. ML:0.8 4.106434E-5 0.16 AML other m 2021-09-03T03:46:36.94
GU.MGRO.HHN. ML:0.7 3.216559E-5 1.1424 AML other m 2021-09-03T03:46:37.65
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