Earthquake (quarry blast) with magnitude of ML 0.6 on date 24-09-2021 and time 09:38:32 (Italy) in region 2 km SE Battifollo (CN)

A magnitude ML 0.6 (quarry blast) earthquake occured in region: 2 km SE Battifollo (CN), on

  • 24-09-2021 07:38:32 (UTC)
  • 24-09-2021 09:38:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3050, 8.0200 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Bagnasco CN 2 1035 1035
Battifollo CN 2 219 1254
Lisio CN 3 201 1455
Scagnello CN 4 194 1649
Massimino SV 4 113 1762
Viola CN 4 391 2153
Nucetto CN 5 430 2583
Perlo CN 6 116 2699
Priola CN 6 701 3400
Monasterolo Casotto CN 7 89 3489
Mombasiglio CN 8 609 4098
Pamparato CN 9 302 4400
Ceva CN 9 5782 10182
Priero CN 10 529 10711
Roburent CN 10 495 11206
Castelnuovo di Ceva CN 10 110 11316
Torre Mondovì CN 11 498 11814
Calizzano SV 11 1475 13289
Murialdo SV 11 841 14130
Sale delle Langhe CN 12 486 14616
Lesegno CN 12 794 15410
Sale San Giovanni CN 12 183 15593
Garessio CN 12 3244 18837
San Michele Mondovì CN 12 2003 20840
Montaldo di Mondovì CN 12 557 21397
Roascio CN 13 97 21494
Montezemolo CN 13 259 21753
Castellino Tanaro CN 14 312 22065
Torresina CN 14 52 22117
Niella Tanaro CN 15 1046 23163
Vicoforte CN 15 3136 26299
Osiglia SV 15 444 26743
Paroldo CN 15 211 26954
Briaglia CN 15 318 27272
Roccavignale SV 15 752 28024
Bardineto SV 15 756 28780
Igliano CN 16 74 28854
Monastero di Vasco CN 16 1297 30151
Cigliè CN 16 190 30341
Millesimo SV 16 3383 33724
Camerana CN 16 631 34355
Rocca Cigliè CN 17 142 34497
Marsaglia CN 17 245 34742
Saliceto CN 17 1323 36065
Frabosa Soprana CN 17 759 36824
Bormida SV 17 387 37211
Frabosa Sottana CN 18 1497 38708
Cengio SV 18 3563 42271
Bastia Mondovì CN 18 669 42940
Mondovì CN 18 22484 65424
Cosseria SV 19 1105 66529
Plodio SV 19 650 67179
Murazzano CN 19 834 68013
Mombarcaro CN 19 268 68281
Ormea CN 19 1617 69898
Monesiglio CN 20 645 70543
Erli SV 20 245 70788

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Savona (61345 inhabitants)
39 Km E of Cuneo (56081 inhabitants)
57 Km NE of Sanremo (54807 inhabitants)
68 Km S of Asti (76202 inhabitants)
74 Km W of Genova (586655 inhabitants)
82 Km SE of Moncalieri (57294 inhabitants)
83 Km SW of Alessandria (93943 inhabitants)
90 Km SE of Torino (890529 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
Bulletin
Rev1000
ML 0.6 2021-09-24
07:38:32
44.3047 8.0197 1 2022-03-30
13:04:38
Bollettino Sismico Italiano INGV 101110651
Reviewed
Rev100
ML 0.6 2021-09-24
07:38:32
44.276 8.0335 7 2021-09-24
07:56:38
Sala Sismica INGV-Roma 95815731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-24 07:38:32 ± 0.2
Latitude 44.3047 ± 0.0144
Longitude 8.0197 ± 0.0126
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 101110651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1710
Semi-minor axis of confidence ellipse (meter) 900
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 1710.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 158
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.14299
Epicentral distance of station farthest from the epicenter (degree) 0.44337
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 101110651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-18 13:51:48

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 95815731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-24 07:56:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.PCP.HHE. 2021-09-24T07:38:42.16 0.3 undecidable manual P 58 0.4434 91 -0.19 69
GU.ENR.HHZ. 2021-09-24T07:38:41.71 0.3 undecidable manual P 260 0.4371 91 -0.49 65
GU.MGRO.HHE. 2021-09-24T07:38:39.10 0.1 undecidable manual P 210 0.3022 91 -0.12 96
IV.QLNO.HHZ. 2021-09-24T07:38:37.89 0.1 positive manual P 85 0.2338 91 0.2 96
GU.CANO.HHZ. 2021-09-24T07:38:36.59 0.1 undecidable manual P 122 0.1835 91 0.02 100
GU.GBOS.HHZ. 2021-09-24T07:38:36.22 0.1 undecidable manual P 244 0.1430 92 0.55 89
GU.RORO.HHZ. 2021-09-24T07:38:36.69 0.1 undecidable manual P 170 0.1952 91 -0.13 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GBOS.HHN. ML:0.3 0.0000181806945 0.2368 AML other m 2021-09-24T07:38:38.37
GU.GBOS.HHE. ML:0.1 0.00001725685 0.1024 AML other m 2021-09-24T07:38:38.68
GU.CANO.HHN. ML:0.6 0.0000331 0.36 AML other m 2021-09-24T07:38:39.50
GU.RORO.HHN. ML:0.5 0.000023507225 0.1024 AML other m 2021-09-24T07:38:39.98
GU.CANO.HHE. ML:0.9 0.00006634999999999999 0.46 AML other m 2021-09-24T07:38:40.69
IV.QLNO.HHE. ML:0.7 0.00003145 0.66 AML other m 2021-09-24T07:38:41.58
IV.QLNO.HHN. ML:0.8 0.0000378 1.68 AML other m 2021-09-24T07:38:42.08
GU.STV.HHE. ML:0.6 0.000009969874 0.1216 AML other m 2021-09-24T07:38:51.77
GU.STV.HHN. ML:0.3 0.0000065596635 0.1984 AML other m 2021-09-24T07:38:54.74
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