Earthquake with magnitude of ML 2.4 on date 27-02-2022 and time 00:36:32 (Italy) in region 1 km E Polonghera (CN)

A magnitude ML 2.4 earthquake occured in region: 1 km E Polonghera (CN), on

  • 26-02-2022 23:36:32 (UTC)
  • 27-02-2022 00:36:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7990, 7.6130 at 18 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
Polonghera CN 1 1160 1160
Casalgrasso CN 3 1480 2640
Faule CN 3 486 3126
Pancalieri TO 4 2038 5164
Murello CN 5 966 6130
Lombriasco TO 5 1050 7180
Racconigi CN 6 10038 17218
Moretta CN 7 4136 21354
Cavallerleone CN 8 644 21998
Osasio TO 8 936 22934
Villanova Solaro CN 8 772 23706
Virle Piemonte TO 8 1206 24912
Villafranca Piemonte TO 9 4729 29641
Torre San Giorgio CN 9 730 30371
Carmagnola TO 10 29079 59450
Ruffia CN 10 367 59817
Caramagna Piemonte CN 10 3034 62851
Vigone TO 11 5182 68033
Cercenasco TO 11 1803 69836
Cavallermaggiore CN 12 5533 75369
Castagnole Piemonte TO 12 2245 77614
Cardè CN 12 1122 78736
Monasterolo di Savigliano CN 12 1371 80107
Carignano TO 13 9261 89368
Scarnafigi CN 13 2162 91530
Scalenghe TO 14 3339 94869
Sommariva del Bosco CN 14 6361 101230
Piobesi Torinese TO 15 3763 104993
None TO 16 8005 112998
Sanfrè CN 16 3040 116038
Ceresole Alba CN 17 2090 118128
Airasca TO 17 3794 121922
Vinovo TO 17 14887 136809
Savigliano CN 17 21441 158250
Villastellone TO 17 4779 163029
Macello TO 18 1229 164258
Marene CN 18 3175 167433
Buriasco TO 18 1410 168843
Candiolo TO 18 5669 174512
La Loggia TO 18 8874 183386
Cavour TO 19 5545 188931
Volvera TO 19 8840 197771
Garzigliana TO 19 572 198343
Saluzzo CN 19 16960 215303
Lagnasco CN 20 1453 216756
Piscina TO 20 3388 220144

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km S of Moncalieri (57294 inhabitants)
31 Km S of Torino (890529 inhabitants)
45 Km N of Cuneo (56081 inhabitants)
48 Km W of Asti (76202 inhabitants)
80 Km W of Alessandria (93943 inhabitants)
88 Km NW of Savona (61345 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
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 2.4 2022-02-26
23:36:32
44.7988 7.6128 18 2022-02-26
23:51:53
Sala Sismica INGV-Roma 101486951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-02-26 23:36:32 ± 0.08
Latitude 44.7988 ± 0.0045
Longitude 7.6128 ± 0.0089
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 101486951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 652
Semi-minor axis of confidence ellipse (meter) 368
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 61
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.04501
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 101486951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-02-26 23:51:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2022-02-26T23:38:29.54 3.0 undecidable manual Sn -0.9 0
IV.BARO.EHE. 2022-02-26T23:38:25.45 3.0 undecidable manual Sn 0.51 0
IV.TOLF.HHN. 2022-02-26T23:38:22.17 3.0 undecidable manual Sn -5 0
IV.LMD.HHN. 2022-02-26T23:38:07.97 3.0 undecidable manual Sg 9.48 0
IV.FIU.EHN. 2022-02-26T23:38:00.45 3.0 undecidable manual Sg 8.03 0
IV.BOZZ.EHE. 2022-02-26T23:37:44.43 3.0 undecidable manual Sg 9.31 0
IV.SENI.HNZ. 2022-02-26T23:37:41.08 3.0 negative manual Pn 4.65 0
IV.GAVE.EHN. 2022-02-26T23:37:34.72 3.0 undecidable manual Pn -4.17 0
IV.CADC.EHZ. 2022-02-26T23:37:34.08 3.0 undecidable manual Sg 2.93 0
IV.FIR.HHZ. 2022-02-26T23:37:30.78 3.0 undecidable manual Pg 13.27 0
IV.TREG.EHN. 2022-02-26T23:37:21.10 3.0 undecidable manual Pg 6.2 0
IV.MNTV.EHZ. 2022-02-26T23:37:20.27 3.0 negative manual Pg 9.91 0
GU.GORR.HHN. 2022-02-26T23:37:16.63 3.0 undecidable manual Sg 2.28 0
RD.ORIF.BHZ. 2022-02-26T23:37:13.20 3.0 undecidable manual Sg -0.08 0
RD.PGF.BHZ. 2022-02-26T23:37:13.48 3.0 negative manual Pn 1.05 0
GU.GSCL.HHE. 2022-02-26T23:37:11.46 3.0 undecidable manual Pn 2.64 0
GU.EQUI.HHZ. 2022-02-26T23:37:07.11 3.0 positive manual Pn 1.73 0
IV.SARZ.HHZ. 2022-02-26T23:37:03.83 3.0 undecidable manual Sn -2.63 0
IV.MSSA.HHN. 2022-02-26T23:37:00.94 3.0 negative manual Pg 2.16 0
FR.SAOF.HHZ.00 2022-02-26T23:36:59.93 0.6 undecidable manual S 183 0.8139 95 0.32 45
GU.RORO.HHE. 2022-02-26T23:36:58.02 0.3 undecidable manual S 155 0.7581 96 0.03 72
GU.GORR.HHZ. 2022-02-26T23:36:58.17 3.0 positive manual Pg 2.52 0
GU.LSD.HHZ. 2022-02-26T23:36:57.28 0.6 undecidable manual S 333 0.7419 96 -0.22 46
GU.CANO.HHZ. 2022-02-26T23:36:57.51 0.6 undecidable manual S 143 0.7401 96 0.07 48
MN.BNI.HHZ. 2022-02-26T23:36:56.77 0.3 undecidable manual S 291 0.7087 96 0.26 71
RD.ORIF.BHZ. 2022-02-26T23:36:56.92 3.0 positive manual Pg 1.87 0
GU.PCP.HHZ. 2022-02-26T23:36:56.28 0.3 undecidable manual S 111 0.7114 96 -0.31 70
GU.STV.HHZ. 2022-02-26T23:36:52.70 0.3 undecidable manual S 200 0.5900 98 -0.33 71
IV.MRGE.HHZ. 2022-02-26T23:36:52.16 0.1 undecidable manual P 338 1.0450 94 -0.14 89
GU.RNCA.HHZ. 2022-02-26T23:36:51.87 3.0 positive manual Pn -0.77 0
GU.ROTM.HHZ. 2022-02-26T23:36:51.67 0.3 undecidable manual S 84 0.5261 99 0.5 69
GU.IMI.HHE. 2022-02-26T23:36:50.06 0.3 undecidable manual P 167 0.9101 95 0.07 70
FR.SAOF.HHZ.00 2022-02-26T23:36:48.76 0.1 undecidable manual P 183 0.8139 95 0.41 89
GU.PZZ.HHZ. 2022-02-26T23:36:48.58 0.3 undecidable manual S 231 0.4587 101 -0.61 67
GU.GENL.EHE. 2022-02-26T23:36:48.64 3.0 undecidable manual Pn -4.64 0
GU.RORO.HHE. 2022-02-26T23:36:47.31 0.1 undecidable manual P 155 0.7581 96 -0.1 96
GU.CIRO.HHZ. 2022-02-26T23:36:47.77 0.1 undecidable manual P 358 0.8031 95 -0.4 89
MN.BNI.HHZ. 2022-02-26T23:36:46.83 0.1 undecidable manual P 291 0.7087 96 0.27 94
GU.PCP.HHZ. 2022-02-26T23:36:46.38 0.1 undecidable manual P 111 0.7114 96 -0.22 95
GU.LSD.HHZ. 2022-02-26T23:36:46.88 1.0 negative manual P 333 0.7419 96 -0.25 23
GU.CANO.HHZ. 2022-02-26T23:36:46.97 0.1 negative manual P 143 0.7401 96 -0.12 96
IV.MONC.HHZ. 2022-02-26T23:36:45.74 0.6 undecidable manual S 39 0.3534 105 -0.41 49
GU.STV.HHZ. 2022-02-26T23:36:44.62 0.1 undecidable manual P 200 0.5900 98 0.07 100
GU.ROTM.HHZ. 2022-02-26T23:36:43.94 0.1 undecidable manual P 84 0.5261 99 0.46 93
GU.PZZ.HHZ. 2022-02-26T23:36:42.28 0.6 positive manual P 231 0.4587 101 -0.05 51
IV.MONC.HHZ. 2022-02-26T23:36:40.95 0.3 undecidable manual P 39 0.3534 105 0.37 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.STV.HHE. ML:2.2 0.0002545 0.2 AML other m 2022-02-26T23:36:53.66
GU.GENL.EHN. ML:2.2 0.0001077 0.76 AML other m 2022-02-26T23:36:53.28
GU.STV.HHN. ML:2.0 0.00017449999999999999 0.64 AML other m 2022-02-26T23:36:54.15
GU.LSD.HHN. ML:1.9 0.00010899999999999999 0.2 AML other m 2022-02-26T23:36:57.90
GU.CANO.HHN. ML:2.9 0.0009699999999999999 0.28 AML other m 2022-02-26T23:36:58.38
GU.CANO.HHE. ML:2.7 0.000709 0.24 AML other m 2022-02-26T23:36:58.70
FR.SAOF.HHE.00 ML:2.2 0.000201 0.78 AML other m 2022-02-26T23:37:01.68
FR.SAOF.HHN.00 ML:2.2 0.00017199999999999998 0.32 AML other m 2022-02-26T23:37:02.36
GU.ROTM.HHN. ML:2.7 0.001008 1.58 AML other m 2022-02-26T23:37:02.14
GU.PCP.HHN. ML:1.9 0.00011995 0.98 AML other m 2022-02-26T23:37:03.11
GU.PCP.HHE. ML:2.0 0.000154 0.54 AML other m 2022-02-26T23:37:03.41
GU.ROTM.HHE. ML:2.5 0.0006995 0.36 AML other m 2022-02-26T23:37:04.81
GU.IMI.HHE. ML:2.5 0.00029949999999999996 1.26 AML other m 2022-02-26T23:37:04.92
GU.LSD.HHE. ML:2.1 0.00016399999999999997 0.74 AML other m 2022-02-26T23:37:05.78
GU.IMI.HHN. ML:2.8 0.000606 0.5 AML other m 2022-02-26T23:37:07.21
IV.SARZ.HHE. ML:2.5 0.0003135 0.44 AML other m 2022-02-26T23:37:14.35
GU.GORR.HHN. ML:2.6 0.00026749999999999994 0.42 AML other m 2022-02-26T23:37:17.31
GU.GORR.HHE. ML:2.5 0.00020950000000000002 0.54 AML other m 2022-02-26T23:37:17.39
RD.ORIF.BHN. ML:2.3 0.00012124999999999999 0.76 AML other m 2022-02-26T23:37:18.43
GU.RNCA.HHN. ML:2.2 0.00013550000000000001 0.72 AML other m 2022-02-26T23:37:18.64
IV.SARZ.HHN. ML:2.5 0.00030649999999999997 0.3 AML other m 2022-02-26T23:37:19.06
GU.RNCA.HHE. ML:2.3 0.00016 0.44 AML other m 2022-02-26T23:37:19.36
RD.ORIF.BHE. ML:2.2 0.00009735000000000001 1.36 AML other m 2022-02-26T23:37:19.01
GU.GENL.EHE. ML:2.3 0.00014000000000000001 0.92 AML other m 2022-02-26T23:37:21.48
GU.GSCL.HHN. ML:2.6 0.00007620000000000001 0.42 AML other m 2022-02-26T23:38:09.42
GU.GSCL.HHE. ML:2.5 0.0000669 0.42 AML other m 2022-02-26T23:38:10.95
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download