Earthquake with magnitude of ML 1.2 on date 25-09-2020 and time 01:09:40 (UTC) in region 3 km E Casalgrasso (CN)

A magnitude ML 1.2 earthquake occured in region: 3 km E Casalgrasso (CN), on

  • 25-09-2020 01:09:40 (UTC)
  • 25-09-2020 03:09:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.82, 7.66 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
Casalgrasso CN 3 1480 1480
Lombriasco TO 3 1050 2530
Polonghera CN 5 1160 3690
Racconigi CN 6 10038 13728
Carmagnola TO 6 29079 42807
Pancalieri TO 6 2038 44845
Faule CN 6 486 45331
Osasio TO 7 936 46267
Caramagna Piemonte CN 8 3034 49301
Murello CN 9 966 50267
Cavallerleone CN 9 644 50911
Virle Piemonte TO 9 1206 52117
Carignano TO 10 9261 61378
Sommariva del Bosco CN 11 6361 67739
Moretta CN 11 4136 71875
Villanova Solaro CN 12 772 72647
Castagnole Piemonte TO 12 2245 74892
Cavallermaggiore CN 12 5533 80425
Ceresole Alba CN 13 2090 82515
Villafranca Piemonte TO 13 4729 87244
Ruffia CN 13 367 87611
Sanfrè CN 13 3040 90651
Vigone TO 13 5182 95833
Villastellone TO 13 4779 100612
Piobesi Torinese TO 14 3763 104375
Cercenasco TO 14 1803 106178
Torre San Giorgio CN 14 730 106908
Vinovo TO 15 14887 121795
Monasterolo di Savigliano CN 15 1371 123166
Scalenghe TO 15 3339 126505
La Loggia TO 16 8874 135379
None TO 16 8005 143384
Cardè CN 17 1122 144506
Candiolo TO 17 5669 150175
Scarnafigi CN 17 2162 152337
Santena TO 17 10830 163167
Airasca TO 18 3794 166961
Marene CN 18 3175 170136
Poirino TO 19 10553 180689
Savigliano CN 19 21441 202130
Volvera TO 19 8840 210970
Pralormo TO 20 1957 212927
Trofarello TO 20 11010 223937
Cambiano TO 20 6107 230044
Nichelino TO 20 48123 278167

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Moncalieri (57294 inhabitants)
29 Km S of Torino (890529 inhabitants)
44 Km W of Asti (76202 inhabitants)
48 Km N of Cuneo (56081 inhabitants)
76 Km W of Alessandria (93943 inhabitants)
86 Km NW of Savona (61345 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 2020-09-25
01:09:40
44.82 7.66 10 2020-09-25
01:19:26
Sala Sismica INGV-Roma 83219101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-25 01:09:40 ± 0.37
Latitude 44.82 ± 0.01
Longitude 7.66 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83219101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2750
Semi-minor axis of confidence ellipse (meter) 1240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 2750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 207
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61514
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 83219101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-25 01:19:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.ENR.HHZ. 2020-09-25T01:10:01.15 0.3 undecidable manual S 196 0.6151 50 -0.49 68
GU.PZZ.HHZ. 2020-09-25T01:09:58.12 0.3 undecidable manual S 231 0.4964 50 -0.01 77
GU.RSP.HHZ. 2020-09-25T01:09:55.98 0.3 undecidable manual S 320 0.4326 50 -0.26 74
MN.BNI.HHZ. 2020-09-25T01:09:55.05 1.0 positive manual Pg 2.3 0
GU.ENR.HHZ. 2020-09-25T01:09:52.45 1.0 undecidable manual P 196 0.6151 50 -0.34 23
GU.GBOS.HHZ. 2020-09-25T01:09:52.67 0.1 undecidable manual P 167 0.59 50 0.31 95
GU.PZZ.HHZ. 2020-09-25T01:09:50.61 0.1 undecidable manual P 231 0.4964 50 -0.16 100
GU.RSP.HHZ. 2020-09-25T01:09:49.32 0.1 undecidable manual P 320 0.4326 50 -0.36 97
GU.BHB.HHZ. 2020-09-25T01:09:48.11 0.1 undecidable manual P 274 0.2824 50 1 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.BHB.HHE. ML:0.9 3.3107655E-5 0.12 AML other m 2020-09-25T01:09:55.11
GU.BHB.HHN. ML:0.8 3.2277185E-5 0.08 AML other m 2020-09-25T01:09:54.75
GU.RSP.HHE. ML:0.9 2.0892975E-5 0.12 AML other m 2020-09-25T01:09:57.45
GU.RSP.HHN. ML:1 3.1498855E-5 0.24 AML other m 2020-09-25T01:09:57.33
GU.RSP.HNE. ML:1.3 5.4780165E-5 0.58 AML other m 2020-09-25T01:10:12.36
GU.RSP.HNN. ML:1.2 4.3062155E-5 0.72 AML other m 2020-09-25T01:10:12.09
GU.PZZ.HHE. ML:1.3 4.639932E-5 0.16 AML other m 2020-09-25T01:09:59.48
GU.PZZ.HHN. ML:1.2 3.8775955E-5 0.22 AML other m 2020-09-25T01:09:59.04
GU.ENR.HHE. ML:2.2 0.00028774685 0.14 AML other m 2020-09-25T01:10:01.49
GU.ENR.HHN. ML:1.4 4.383691E-5 0.06 AML other m 2020-09-25T01:10:01.85
GU.GBOS.HHE. ML:1.4 4.7079265E-5 2.2 AML other m 2020-09-25T01:10:18.47
GU.GBOS.HHN. ML:1 1.9597805E-5 0.9 AML other m 2020-09-25T01:09:57.30
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download