Earthquake with magnitude of ML 1.4 on date 31-05-2021 and time 05:33:41 (UTC) in region 1 km NE Borgo Val di Taro (PR)

A magnitude ML 1.4 earthquake occured in region: 1 km NE Borgo Val di Taro (PR), on

  • 31-05-2021 05:33:41 (UTC)
  • 31-05-2021 07:33:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.493, 9.777 at 8 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
Borgo Val di Taro PR 1 6999 6999
Albareto PR 8 2156 9155
Compiano PR 9 1112 10267
Bedonia PR 12 3482 13749
Valmozzola PR 12 539 14288
Tornolo PR 12 1010 15298
Pontremoli MS 15 7357 22655
Zeri MS 16 1094 23749
Bardi PR 16 2227 25976
Berceto PR 17 2109 28085
Varese Ligure SP 19 2059 30144
Varsi PR 20 1230 31374

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km N of La Spezia (93959 inhabitants)
53 Km NW of Carrara (63133 inhabitants)
56 Km SW of Parma (192836 inhabitants)
58 Km NW of Massa (69479 inhabitants)
63 Km S of Piacenza (102191 inhabitants)
68 Km E of Genova (586655 inhabitants)
71 Km W of Reggio nell'Emilia (171345 inhabitants)
74 Km S of Cremona (71901 inhabitants)
79 Km NW of Viareggio (62467 inhabitants)
91 Km SE of Pavia (72576 inhabitants)
92 Km NW of Lucca (89046 inhabitants)
93 Km W of Modena (184973 inhabitants)
94 Km W of Carpi (70699 inhabitants)
100 Km NW of Pisa (89158 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 2021-05-31
05:33:41
44.4928 9.7773 9 2021-05-31
05:48:01
Sala Sismica INGV-Roma 90652261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 05:33:41 ± 0.1
Latitude 44.4928 ± 0.0090
Longitude 9.7773 ± 0.0076
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 90652261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 997
Semi-minor axis of confidence ellipse (meter) 535
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.20505
Epicentral distance of station farthest from the epicenter (degree) 0.44606
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:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 90652261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 05:48:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BOB.HHE. 2021-05-31T05:33:54.69 0.3 undecidable manual S 320 0.3615 50 -0.18 74
GU.GORR.HHE. 2021-05-31T05:33:54.83 0.1 undecidable manual S 288 0.3633 50 -0.11 100
IV.MSSA.HHZ. 2021-05-31T05:33:51.13 0.3 undecidable manual S 227 0.2563 107 -0.31 74
IV.PLMA.HHZ. 2021-05-31T05:33:50.49 0.6 undecidable manual P 173 0.4461 50 -0.03 50
GU.EQUI.HHZ. 2021-05-31T05:33:50.07 1.0 positive manual P 140 0.4227 50 -0.05 25
IV.BOB.HHE. 2021-05-31T05:33:49.00 0.3 undecidable manual P 320 0.3615 50 -0.07 76
GU.GRAM.HHZ. 2021-05-31T05:33:49.41 0.3 undecidable manual S 91 0.205 111 -0.17 76
GU.GORR.HHE. 2021-05-31T05:33:49.49 0.1 undecidable manual P 288 0.3633 50 0.38 94
IV.MSSA.HHZ. 2021-05-31T05:33:47.32 0.1 undecidable manual P 227 0.2563 107 0.23 100
GU.GRAM.HHZ. 2021-05-31T05:33:46.13 0.3 positive manual P 91 0.205 111 0.12 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GRAM.HHN. ML:1.2 9.295E-5 0.38 AML other m 2021-05-31T05:33:50.36
GU.GRAM.HHE. ML:1.2 0.0001081 0.14 AML other m 2021-05-31T05:33:50.85
IV.MSSA.HHE. ML:1.5 0.0001615 0.52 AML other m 2021-05-31T05:33:51.96
IV.MSSA.HHN. ML:1.6 0.0001995 0.76 AML other m 2021-05-31T05:33:52.15
IV.SARZ.HHE. ML:2.5 0.000436 0.08 AML other m 2021-05-31T05:33:54.69
IV.SARZ.HNE. ML:2.5 0.0004245 0.08 AML other m 2021-05-31T05:33:54.69
IV.SARZ.HNN. ML:2.5 0.000458 1.74 AML other m 2021-05-31T05:33:55.87
IV.SARZ.HHN. ML:2.6 0.0004885 1.74 AML other m 2021-05-31T05:33:55.00
IV.CADC.HNE. ML:0 0.0004565 1.58 AML other m 2021-05-31T05:34:13.94
IV.CADC.HNN. ML:0 0.000511 0.64 AML other m 2021-05-31T05:34:14.72
IV.PESA.HHN. ML:0 1.87E-5 0.42 AML other m 2021-05-31T05:34:23.20
IV.PESA.HHE. ML:0 1.635E-5 0.42 AML other m 2021-05-31T05:34:23.20
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