Earthquake with magnitude of ML 1.4 on date 27-10-2021 and time 14:20:20 (UTC) in region 4 km SW Castiglione dei Pepoli (BO)

A magnitude ML 1.4 earthquake occured in region: 4 km SW Castiglione dei Pepoli (BO), on

  • 27-10-2021 14:20:20 (UTC)
  • 27-10-2021 16:20:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.123, 11.113 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
Castiglione dei Pepoli BO 4 5648 5648
Camugnano BO 6 1885 7533
Castel di Casio BO 8 3448 10981
Vernio PO 8 6060 17041
Sambuca Pistoiese PT 9 1626 18667
Cantagallo PO 11 3105 21772
Alto Reno Terme BO 11 6960 28732
San Benedetto Val di Sambro BO 14 4315 33047
Grizzana Morandi BO 15 3916 36963
Gaggio Montano BO 16 4878 41841
Barberino di Mugello FI 17 10836 52677
Vaiano PO 17 9895 62572
Lizzano in Belvedere BO 18 2212 64784
Vergato BO 18 7639 72423
Monghidoro BO 20 3749 76172
Castel d'Aiano BO 20 1906 78078

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NE of Pistoia (90315 inhabitants)
27 Km N of Prato (191150 inhabitants)
41 Km N of Scandicci (50609 inhabitants)
41 Km N of Firenze (382808 inhabitants)
45 Km SW of Bologna (386663 inhabitants)
54 Km W of Imola (69797 inhabitants)
58 Km NE of Lucca (89046 inhabitants)
60 Km S of Modena (184973 inhabitants)
64 Km W of Faenza (58541 inhabitants)
73 Km NE of Pisa (89158 inhabitants)
75 Km SE of Reggio nell'Emilia (171345 inhabitants)
75 Km E of Viareggio (62467 inhabitants)
75 Km W of Forlì (117913 inhabitants)
76 Km S of Carpi (70699 inhabitants)
78 Km E of Massa (69479 inhabitants)
81 Km E of Carrara (63133 inhabitants)
89 Km SW of Ferrara (133155 inhabitants)
90 Km W of Cesena (96758 inhabitants)
90 Km NE of Livorno (159219 inhabitants)
91 Km N of Siena (53903 inhabitants)
93 Km W of Ravenna (159116 inhabitants)
96 Km NW of Arezzo (99543 inhabitants)
98 Km SE of Parma (192836 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 1.4 2021-10-27
14:20:20
44.1232 11.1127 10 2021-10-27
14:28:53
Sala Sismica INGV-Roma 97023331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 14:20:20 ± 0.09
Latitude 44.1232 ± 0.0054
Longitude 11.1127 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97023331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 594
Semi-minor axis of confidence ellipse (meter) 553
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 131
Circular confidence region, given by single value of horizontal uncertainty (meter) 590
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 97023331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 14:28:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ECTS.HHZ. 2021-10-27T14:21:58.67 3.0 undecidable manual Pn -6.58 0
IV.LPEL.HHZ. 2021-10-27T14:21:57.53 3.0 undecidable manual Sg 5.58 0
SL.LJU.BHZ. 2021-10-27T14:21:46.97 3.0 undecidable manual Sn -4.51 0
OX.MPRI.HHZ. 2021-10-27T14:21:39.77 3.0 undecidable manual Sg 3.44 0
IV.MNTT.EHZ. 2021-10-27T14:21:30.44 3.0 undecidable manual Sg 2.04 0
OT.OT05.EHZ. 2021-10-27T14:21:27.55 3.0 negative manual Pn 0.71 0
OT.OT17.EHZ. 2021-10-27T14:21:26.82 3.0 positive manual Pn 2.1 0
IV.DGI.HHZ. 2021-10-27T14:21:23.06 3.0 undecidable manual Pn -0.58 0
IV.LRP.EHZ. 2021-10-27T14:21:13.58 3.0 undecidable manual Pg 1.25 0
IV.LAV9.HNZ. 2021-10-27T14:21:08.27 3.0 undecidable manual Pg 1.05 0
OX.MPRI.HHZ. 2021-10-27T14:21:02.20 3.0 undecidable manual Pn -1.32 0
IV.CTI.HHZ. 2021-10-27T14:20:58.55 3.0 positive manual Pg 2.83 0
IV.FOSV.EHZ. 2021-10-27T14:20:50.31 3.0 undecidable manual P 0.03 0
IV.SBPO.HNZ. 2021-10-27T14:20:49.96 3.0 undecidable manual S -4.78 0
IV.NDIM.HNZ. 2021-10-27T14:20:46.26 3.0 undecidable manual S -3.14 0
IV.ZEN8.EHZ. 2021-10-27T14:20:45.42 3.0 undecidable manual P -4.06 0
IV.VISG.HHZ. 2021-10-27T14:20:30.26 0.6 undecidable manual S 74 0.2401 50 -0.07 48
GU.POPM.HHZ. 2021-10-27T14:20:30.80 0.3 undecidable manual S 253 0.2671 50 -0.33 68
IV.MPPT.EHZ. 2021-10-27T14:20:28.00 0.1 undecidable manual S 186 0.1664 119 0.16 95
IV.SEI.HHZ. 2021-10-27T14:20:28.30 0.3 undecidable manual S 111 0.1898 116 -0.34 68
IV.MTRZ.HNE. 2021-10-27T14:20:27.84 0.3 undecidable manual P 50 0.2932 50 0.74 59
IV.MOCL.EHZ. 2021-10-27T14:20:26.68 0.1 undecidable manual S 157 0.1277 125 0.09 97
GU.POPM.HHZ. 2021-10-27T14:20:26.52 0.3 undecidable manual P 253 0.2671 50 -0.14 70
IV.ZCCA.HHE. 2021-10-27T14:20:26.70 0.6 undecidable manual P 337 0.2473 50 0.38 45
IV.SEI.HHZ. 2021-10-27T14:20:25.10 0.1 undecidable manual P 111 0.1898 116 -0.12 96
IV.VISG.HHZ. 2021-10-27T14:20:25.92 0.3 undecidable manual P 74 0.2401 50 -0.27 69
IV.FNVD.HHE. 2021-10-27T14:20:24.33 0.3 undecidable manual S 9 0.045 154 -0.12 74
IV.MOCL.EHZ. 2021-10-27T14:20:24.16 0.1 positive manual P 157 0.1277 125 0.13 97
IV.MPPT.EHZ. 2021-10-27T14:20:24.82 0.3 undecidable manual P 186 0.1664 119 0.06 73
IV.FNVD.HHE. 2021-10-27T14:20:22.77 0.1 undecidable manual P 9 0.045 154 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHE. ML:1.8 0.0007295 0.2 AML other m 2021-10-27T14:20:26.91
IV.MOCL.EHN. ML:1.6 0.000394 0.18 AML other m 2021-10-27T14:20:26.89
IV.MPPT.EHE. ML:1.4 0.000222 0.22 AML other m 2021-10-27T14:20:28.21
IV.MPPT.EHN. ML:1.4 0.000226 0.22 AML other m 2021-10-27T14:20:28.19
IV.SEI.HHN. ML:1.5 0.000247 0.28 AML other m 2021-10-27T14:20:28.41
IV.SEI.HHE. ML:1.4 0.0001735 0.4 AML other m 2021-10-27T14:20:30.24
IV.VISG.HHE. ML:0.8 3.72E-5 0.18 AML other m 2021-10-27T14:20:30.58
GU.POPM.HHN. ML:1.4 0.0001175 0.22 AML other m 2021-10-27T14:20:31.11
IV.VISG.HHN. ML:0.9 4.465E-5 0.7 AML other m 2021-10-27T14:20:31.31
GU.POPM.HHE. ML:1.2 8.455E-5 0.24 AML other m 2021-10-27T14:20:31.34
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