Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 07-02-2023 and time 22:57:54 (UTC) in region 2 km SW Coazzolo (AT)

A magnitude ML 1.3 earthquake occured in region: 2 km SW Coazzolo (AT), on

  • 07-02-2023 22:57:54 (UTC)
  • 07-02-2023 23:57:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.7160, 8.1370 at 15 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Coazzolo AT 2 302 302
Neive CN 2 3405 3707
Neviglie CN 3 382 4089
Mango CN 4 1308 5397
Castiglione Tinella CN 4 895 6292
Barbaresco CN 5 658 6950
Castagnole delle Lanze AT 5 3798 10748
Trezzo Tinella CN 5 331 11079
Treiso CN 5 820 11899
Camo CN 5 201 12100
Cossano Belbo CN 7 958 13058
Santo Stefano Belbo CN 8 3984 17042
Calosso AT 8 1279 18321
Magliano Alfieri CN 8 2153 20474
Alba CN 8 31437 51911
Guarene CN 8 3596 55507
Costigliole d'Asti AT 9 5914 61421
Rocchetta Belbo CN 9 167 61588
Castagnito CN 10 2163 63751
Benevello CN 10 474 64225
Priocca CN 10 2017 66242
Govone CN 10 2203 68445
Borgomale CN 11 381 68826
Castellinaldo d'Alba CN 11 938 69764
Loazzolo AT 11 359 70123
Diano d'Alba CN 11 3570 73693
Rodello CN 11 980 74673
Vesime AT 11 622 75295
Cessole AT 11 403 75698
Castino CN 12 483 76181
San Martino Alfieri AT 12 666 76847
Canelli AT 12 10485 87332
Vezza d'Alba CN 12 2287 89619
Montelupo Albese CN 12 529 90148
Agliano Terme AT 12 1642 91790
Moasca AT 12 494 92284
Piobesi d'Alba CN 13 1288 93572
Bosia CN 13 177 93749
Lequio Berria CN 13 487 94236
Isola d'Asti AT 13 2071 96307
Roddi CN 13 1607 97914
Cassinasco AT 13 611 98525
San Marzano Oliveto AT 13 1047 99572
Bubbio AT 14 893 100465
Grinzane Cavour CN 14 1995 102460
Corneliano d'Alba CN 14 2118 104578
San Giorgio Scarampi AT 14 122 104700
Perletto CN 14 292 104992
Albaretto della Torre CN 14 242 105234
Montegrosso d'Asti AT 14 2344 107578
Castelnuovo Calcea AT 14 759 108337
San Damiano d'Asti AT 14 8315 116652
Antignano AT 15 974 117626
Canale CN 15 5686 123312
Arguello CN 15 199 123511
Vigliano d'Asti AT 15 835 124346
Monticello d'Alba CN 15 2292 126638
Cortemilia CN 16 2331 128969
Sinio CN 16 522 129491
Celle Enomondo AT 16 484 129975
Montaldo Scarampi AT 16 755 130730
Cravanzana CN 16 411 131141
Serralunga d'Alba CN 16 564 131705
Cerretto Langhe CN 16 442 132147
Calamandrana AT 16 1761 133908
Castiglione Falletto CN 16 700 134608
Santa Vittoria d'Alba CN 16 2795 137403
Revigliasco d'Asti AT 16 767 138170
Cisterna d'Asti AT 16 1245 139415
Mongardino AT 16 921 140336
Rocchetta Palafea AT 17 338 140674
Monastero Bormida AT 17 931 141605
Verduno CN 17 588 142193
Sessame AT 17 271 142464
Mombercelli AT 17 2259 144723
Olmo Gentile AT 17 80 144803
Torre Bormida CN 17 200 145003
Roccaverano AT 17 399 145402
Santo Stefano Roero CN 18 1390 146792
Vinchio AT 18 601 147393
Montà CN 18 4733 152126
Montaldo Roero CN 18 844 152970
Monteu Roero CN 18 1634 154604
Baldissero d'Alba CN 18 1069 155673
La Morra CN 18 2724 158397
Roddino CN 18 400 158797
Serravalle Langhe CN 18 315 159112
Sommariva Perno CN 18 2797 161909
Vaglio Serra AT 18 275 162184
Nizza Monferrato AT 19 10429 172613
Cissone CN 19 85 172698
Bergolo CN 19 71 172769
Feisoglio CN 19 316 173085
Bistagno AL 19 1887 174972
Barolo CN 19 740 175712
Castel Boglione AT 19 609 176321
Pocapaglia CN 20 3339 179660
Tigliole AT 20 1699 181359
Levice CN 20 231 181590
Monforte d'Alba CN 20 2056 183646
Belveglio AT 20 350 183996

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Asti (76202 inhabitants)
44 Km W of Alessandria (93943 inhabitants)
48 Km SE of Moncalieri (57294 inhabitants)
53 Km NW of Savona (61345 inhabitants)
54 Km SE of Torino (890529 inhabitants)
59 Km NE of Cuneo (56081 inhabitants)
72 Km W of Genova (586655 inhabitants)
88 Km SW of Vigevano (63310 inhabitants)
90 Km SW of Novara (104380 inhabitants)
96 Km SW of Pavia (72576 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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.3 2023-02-07
22:57:54		 44.7162 8.1368 15 2023-02-07
23:13:14		 Sala Sismica INGV-Roma 114238841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-07 22:57:54 ± 0.08
Latitude 44.7162 ± 0.0036
Longitude 8.1368 ± 0.0051
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 114238841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 459
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 136
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.20235
Epicentral distance of station farthest from the epicenter (degree) 0.75633
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 114238841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-07 23:13:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PZZ.HHE. 2023-02-07T22:58:19.20 0.3 undecidable manual S 254 0.7563 93 -0.19 66
GU.STV.HHE. 2023-02-07T22:58:18.79 0.3 undecidable manual S 231 0.7455 93 -0.29 65
GU.ENR.HHZ. 2023-02-07T22:58:17.95 0.1 undecidable manual S 227 0.7069 93 0.02 92
GU.RORO.HHE. 2023-02-07T22:58:14.80 0.1 undecidable manual S 185 0.6052 94 -0.14 93
GU.CANO.HHE. 2023-02-07T22:58:12.19 0.1 undecidable manual S 172 0.5135 95 -0.03 96
GU.GBOS.HHZ. 2023-02-07T22:58:12.35 0.1 undecidable manual S 204 0.5189 95 -0.05 96
GU.PZZ.HHE. 2023-02-07T22:58:09.21 0.6 undecidable manual P 254 0.7563 93 0.34 43
IV.QLNO.HHZ. 2023-02-07T22:58:09.41 0.3 undecidable manual S 159 0.4191 97 -0.03 73
GU.STV.HHE. 2023-02-07T22:58:09.21 0.6 undecidable manual P 231 0.7455 93 0.52 41
GU.ENR.HHZ. 2023-02-07T22:58:08.27 0.6 negative manual P 227 0.7069 93 0.24 44
GU.RORO.HHE. 2023-02-07T22:58:06.50 0.1 undecidable manual P 185 0.6052 94 0.2 90
GU.PCP.HHZ. 2023-02-07T22:58:06.83 0.3 undecidable manual S 121 0.3390 99 -0.27 72
GU.BHB.HHZ. 2023-02-07T22:58:06.25 0.6 positive manual P 281 0.6313 94 -0.5 42
GU.GBOS.HHZ. 2023-02-07T22:58:05.11 1.0 undecidable manual P 204 0.5189 95 0.27 23
GU.CANO.HHE. 2023-02-07T22:58:04.92 0.1 undecidable manual P 172 0.5135 95 0.19 92
IV.QLNO.HHZ. 2023-02-07T22:58:03.36 0.1 positive manual P 159 0.4191 97 0.23 93
GU.ROTM.HHZ. 2023-02-07T22:58:03.30 0.1 undecidable manual S 49 0.2023 110 0.13 100
IV.MONC.HHE. 2023-02-07T22:58:02.61 0.6 undecidable manual P 338 0.3876 97 0.02 49
GU.PCP.HHZ. 2023-02-07T22:58:01.58 0.3 positive manual P 121 0.3390 99 -0.2 73
GU.ROTM.HHZ. 2023-02-07T22:57:59.32 0.1 undecidable manual P 49 0.2023 110 -0.19 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.ENR.HHE. ML:0.0 0.000027123905000000003 0.064 AML other m 2023-02-07T22:58:19.60
GU.ENR.HHN. ML:0.0 0.000024729045 0.0384 AML other m 2023-02-07T22:58:19.45
GU.ROTM.HHE. ML:0.0 0.00026404479999999996 0.2304 AML other m 2023-02-07T22:58:03.69
GU.ROTM.HHN. ML:0.0 0.000189339335 0.6144 AML other m 2023-02-07T22:58:11.71
GU.PCP.HHE. ML:0.0 0.000018399465 0.2176 AML other m 2023-02-07T22:58:06.96
GU.PCP.HHN. ML:0.0 0.00001759484 0.064 AML other m 2023-02-07T22:58:07.74
IV.QLNO.HHE. ML:0.0 0.00002663312 0.0768 AML other m 2023-02-07T22:58:09.59
IV.QLNO.HHN. ML:0.0 0.000031598845 0.128 AML other m 2023-02-07T22:58:10.32
GU.GBOS.HHE. ML:0.0 0.0000114914695 0.2816 AML other m 2023-02-07T22:58:12.47
GU.GBOS.HHN. ML:0.0 0.0000178283425 0.1152 AML other m 2023-02-07T22:58:13.59
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, /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