Earthquake with magnitude of ML 1.1 on date 26-10-2021 and time 03:14:08 (UTC) in region 5 km SE Pieve Santo Stefano (AR)

A magnitude ML 1.1 earthquake occured in region: 5 km SE Pieve Santo Stefano (AR), on

  • 26-10-2021 03:14:08 (UTC)
  • 26-10-2021 05:14:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.624, 12.068 at 9 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
Pieve Santo Stefano AR 6 3183 3183
Caprese Michelangelo AR 7 1426 4609
Sansepolcro AR 8 15884 20493
Anghiari AR 9 5638 26131
San Giustino PG 12 11297 37428
Badia Tedalda AR 13 1087 38515
Chiusi della Verna AR 14 2023 40538
Citerna PG 14 3531 44069
Chitignano AR 16 899 44968
Monterchi AR 16 1757 46725
Subbiano AR 17 6331 53056
Capolona AR 18 5438 58494
Borgo Pace PU 19 606 59100
Castel Focognano AR 19 3149 62249
Verghereto FC 20 1907 64156

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Arezzo (99543 inhabitants)
59 Km S of Cesena (96758 inhabitants)
63 Km NW of Perugia (166134 inhabitants)
63 Km SW of Rimini (147750 inhabitants)
67 Km S of Forlì (117913 inhabitants)
67 Km E of Firenze (382808 inhabitants)
68 Km NE of Siena (53903 inhabitants)
73 Km E of Scandicci (50609 inhabitants)
75 Km W of Pesaro (94582 inhabitants)
75 Km S of Faenza (58541 inhabitants)
80 Km W of Fano (60888 inhabitants)
83 Km E of Prato (191150 inhabitants)
86 Km SE of Imola (69797 inhabitants)
89 Km S of Ravenna (159116 inhabitants)
90 Km NW of Foligno (57155 inhabitants)
99 Km E of Pistoia (90315 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 1.1 2021-10-26
03:14:08
43.6237 12.0677 9 2021-10-26
03:19:25
Sala Sismica INGV-Roma 96992451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-26 03:14:08 ± 0.08
Latitude 43.6237 ± 0.0054
Longitude 12.0677 ± 0.0050
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96992451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 590
Semi-minor axis of confidence ellipse (meter) 299
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 359
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) 75
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 21
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
Epicentral distance of station farthest from the epicenter (degree) 0.37142
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 22
Type of magnitude ML
Reference to an origin 96992451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-26 03:19:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-10-26T03:14:31.84 3.0 undecidable manual P 0.22 0
IV.PII.HHZ. 2021-10-26T03:14:30.38 3.0 negative manual P 0.02 0
GU.MAIM.HHZ. 2021-10-26T03:14:30.41 3.0 undecidable manual P -0.69 0
IV.PIEI.HHZ. 2021-10-26T03:14:21.12 0.1 undecidable manual S 104 0.3498 50 -0.27 90
IV.NARO.HHZ. 2021-10-26T03:14:21.95 0.1 undecidable manual S 92 0.3714 50 -0.09 93
IV.PE3.EHZ. 2021-10-26T03:14:21.18 0.1 undecidable manual S 77 0.3184 50 0.71 79
IV.CAFI.HHZ. 2021-10-26T03:14:20.00 0.1 undecidable manual S 194 0.3031 50 -0.02 96
IV.APEC.HHZ. 2021-10-26T03:14:19.00 0.1 undecidable manual S 104 0.2635 107 0.22 93
IV.CAFI.HHZ. 2021-10-26T03:14:15.05 0.6 negative manual P 194 0.3031 50 0.04 48
IV.BADI.EHZ. 2021-10-26T03:14:15.38 0.1 undecidable manual S 132 0.1718 116 -0.1 96
IV.PE3.EHZ. 2021-10-26T03:14:15.30 1.0 positive manual P 77 0.3184 50 0.04 24
IV.SFI.EHZ. 2021-10-26T03:14:15.03 1.0 positive manual P 331 0.3229 50 -0.31 22
IV.PIEI.HHZ. 2021-10-26T03:14:15.49 0.6 negative manual P 104 0.3498 50 -0.31 45
IV.NARO.HHZ. 2021-10-26T03:14:15.82 1.0 negative manual P 92 0.3714 50 -0.35 22
IV.APEC.HHZ. 2021-10-26T03:14:14.19 0.6 undecidable manual P 104 0.2635 107 -0.1 47
IV.CPGN.EHZ. 2021-10-26T03:14:14.56 1.0 undecidable manual P 46 0.2545 108 0.45 22
IV.ASQU.HHZ. 2021-10-26T03:14:14.07 0.6 negative manual P 311 0.2653 107 -0.26 46
IV.PARC.HHZ. 2021-10-26T03:14:13.61 0.1 undecidable manual S 79 0.1259 123 -0.35 92
IV.SSP9.EHZ. 2021-10-26T03:14:12.46 0.1 undecidable manual S 137 0.0674 141 0.19 97
IV.BADI.EHZ. 2021-10-26T03:14:12.37 0.1 undecidable manual P 132 0.1718 116 -0.02 98
IV.CRE.HHZ. 2021-10-26T03:14:12.70 0.1 undecidable manual S 267 0.0836 135 0.01 100
IV.PARC.HHZ. 2021-10-26T03:14:11.44 0.1 undecidable manual P 79 0.1259 123 -0.07 98
IV.CRE.HHZ. 2021-10-26T03:14:10.95 0.1 positive manual P 267 0.0836 135 0.17 97
IV.SSP9.EHZ. 2021-10-26T03:14:10.60 0.1 undecidable manual P 137 0.0674 141 0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSP9.EHE. ML:0.7 8.165E-5 0.26 AML other m 2021-10-26T03:14:10.89
IV.SSP9.EHN. ML:0.8 9.065E-5 0.5 AML other m 2021-10-26T03:14:12.57
IV.CRE.HHN. ML:1.4 0.0003705 0.18 AML other m 2021-10-26T03:14:12.89
IV.CRE.HHE. ML:1.2 0.000209 1.8 AML other m 2021-10-26T03:14:13.05
IV.PARC.HHE. ML:1.1 0.000138 0.08 AML other m 2021-10-26T03:14:13.75
IV.PARC.HHN. ML:1.6 0.0004275 0.1 AML other m 2021-10-26T03:14:13.75
IV.APEC.HHN. ML:1 5.355E-5 0.2 AML other m 2021-10-26T03:14:19.50
IV.APEC.HHE. ML:1.3 0.000103 0.26 AML other m 2021-10-26T03:14:19.45
IV.ASQU.HHE. ML:0.5 1.735E-5 1.18 AML other m 2021-10-26T03:14:20.64
IV.CAFI.HHE. ML:0.8 2.58E-5 0.72 AML other m 2021-10-26T03:14:20.44
IV.CAFI.HHN. ML:0.8 2.75E-5 0.14 AML other m 2021-10-26T03:14:20.38
IV.ASQU.HHN. ML:0.5 1.4115E-5 1.26 AML other m 2021-10-26T03:14:20.92
IV.PE3.EHE. ML:1.4 9.8085E-5 0.32 AML other m 2021-10-26T03:14:21.38
IV.PE3.EHN. ML:1.5 0.00011435 0.34 AML other m 2021-10-26T03:14:21.55
IV.PIEI.HHN. ML:0.9 3.115E-5 0.1 AML other m 2021-10-26T03:14:21.61
IV.PIEI.HHE. ML:0.9 2.995E-5 0.78 AML other m 2021-10-26T03:14:22.03
IV.NARO.HHN. ML:0.9 2.35E-5 0.54 AML other m 2021-10-26T03:14:22.51
IV.NARO.HHE. ML:0.8 1.825E-5 0.48 AML other m 2021-10-26T03:14:23.16
GU.MAIM.HHN. ML:1.9 4.765E-5 0.36 AML other m 2021-10-26T03:14:32.81
GU.MAIM.HHE. ML:1.7 3.665E-5 0.7 AML other m 2021-10-26T03:14:32.87
IV.PII.HHN. ML:2.2 0.00011955 0.38 AML other m 2021-10-26T03:14:32.98
IV.PII.HHE. ML:2.2 0.0001114 0.24 AML other m 2021-10-26T03:14:33.12
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