Earthquake with magnitude of ML 1.2 on date 21-09-2021 and time 09:53:51 (Italy) in region Confine Italia Francia (FRANCIA)

A magnitude ML 1.2 earthquake occured in region: Confine Italia Francia (FRANCIA), on

  • 21-09-2021 07:53:51 (UTC)
  • 21-09-2021 09:53:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.726, 6.714 at 9 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
76 Km W of Cuneo (56081 inhabitants)
83 Km W of Moncalieri (57294 inhabitants)
86 Km W of Torino (890529 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 1.2 2021-09-21
07:53:51
44.7257 6.7137 9 2021-09-21
08:06:40
Sala Sismica INGV-Roma 95690381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 07:53:51 ± 0.23
Latitude 44.7257 ± 0.0081
Longitude 6.7137 ± 0.0139
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95690381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1059
Semi-minor axis of confidence ellipse (meter) 850
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.063
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 95690381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 08:06:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.RSF3.HHZ.02 2021-09-21T07:55:42.74 3.0 undecidable manual Pn 4.54 0
IV.RIBO.EHZ.01 2021-09-21T07:55:33.62 3.0 undecidable manual Sn 1.33 0
IV.PP3.EHZ. 2021-09-21T07:55:32.25 3.0 negative manual Pg 23.049999 0
IV.RMP.HHZ. 2021-09-21T07:55:30.53 3.0 negative manual Pg 20.09 0
IV.CRTC.HHZ. 2021-09-21T07:55:20.42 3.0 undecidable manual Pg 19.67 0
IV.BAG8.EHZ. 2021-09-21T07:55:17.27 3.0 undecidable manual Sn 2.21 0
IV.PE3.EHZ. 2021-09-21T07:55:17.09 3.0 undecidable manual Pg 19.82 0
IV.APEC.HHZ. 2021-09-21T07:55:14.63 3.0 positive manual Pg 17.559999 0
IV.NARO.HHZ. 2021-09-21T07:55:09.92 3.0 undecidable manual Pg 11.52 0
SI.ABSI.HHZ. 2021-09-21T07:55:00.71 3.0 negative manual Pg 9.82 0
IV.ZEN8.EHZ. 2021-09-21T07:54:51.53 3.0 undecidable manual Pg 11.87 0
GU.CIRO.HHZ. 2021-09-21T07:54:25.92 0.6 undecidable manual S 34 1.063 50 0.09 42
GU.ENR.HHZ. 2021-09-21T07:54:14.82 0.6 undecidable manual S 134 0.706 50 -0.45 42
GU.STV.HHZ. 2021-09-21T07:54:13.30 0.3 undecidable manual S 137 0.6493 50 -0.28 66
RD.ORIF.BHZ. 2021-09-21T07:54:12.24 0.6 undecidable manual S 288 0.6214 50 -0.52 42
GU.MGRO.HHZ. 2021-09-21T07:54:11.22 3.0 undecidable manual P -0.81 0
GU.RSP.HHZ. 2021-09-21T07:54:11.41 0.6 undecidable manual S 43 0.5747 50 0.03 47
GU.CIRO.HHZ. 2021-09-21T07:54:11.76 1.0 undecidable manual P 34 1.063 50 0.43 20
GU.ENR.HHZ. 2021-09-21T07:54:05.92 0.3 undecidable manual P 134 0.706 50 0.69 58
GU.PZZ.HHZ. 2021-09-21T07:54:04.19 1.0 undecidable manual S 127 0.3606 50 -0.83 20
RD.ORIF.BHZ. 2021-09-21T07:54:04.38 1.0 undecidable manual P 288 0.6214 50 0.6 20
GU.STV.HHZ. 2021-09-21T07:54:04.52 0.6 undecidable manual P 137 0.6493 50 0.26 44
GU.RSP.HHZ. 2021-09-21T07:54:03.44 0.3 negative manual P 43 0.5747 50 0.46 65
GU.BHB.HHZ. 2021-09-21T07:54:00.03 0.1 positive manual P 74 0.4047 50 -0.05 98
GU.PZZ.HHZ. 2021-09-21T07:53:59.23 0.6 positive manual P 127 0.3606 50 -0.08 49
GU.RRL.HHZ. 2021-09-21T07:53:59.59 0.1 undecidable manual S 15 0.2023 113 -0.37 95
GU.RRL.HHZ. 2021-09-21T07:53:56.52 0.1 negative manual P 15 0.2023 113 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.RRL.HHN. ML:1.4 0.00016482215 0.16 AML other m 2021-09-21T07:53:59.91
GU.RRL.HHE. ML:1.3 0.000124807135 0.2048 AML other m 2021-09-21T07:53:59.69
GU.PZZ.HHN. ML:1.4 8.533664E-5 0.16 AML other m 2021-09-21T07:54:04.38
GU.PZZ.HHE. ML:1.5 0.0001085 0.24 AML other m 2021-09-21T07:54:04.85
GU.TRAV.HHN. ML:1.3 1.645E-5 1.08 AML other m 2021-09-21T07:54:27.22
GU.RSP.HHE. ML:1.2 3.006279E-5 0.0832 AML other m 2021-09-21T07:54:12.73
GU.RSP.HHN. ML:1.1 2.6027825E-5 0.1216 AML other m 2021-09-21T07:54:14.00
RD.ORIF.BHE. ML:0.8 1.0870696E-5 0.2368 AML other m 2021-09-21T07:54:12.91
RD.ORIF.BHN. ML:1.1 1.8663955E-5 0.32 AML other m 2021-09-21T07:54:12.41
GU.STV.HHN. ML:0.8 8.51531105E-6 0.1344 AML other m 2021-09-21T07:54:13.92
GU.CIRO.HHE. ML:1.1 8.5484645E-6 0.2816 AML other m 2021-09-21T07:54:29.87
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