Earthquake with magnitude of ML 0.7 on date 22-12-2021 and time 03:39:56 (Italy) in region 3 km NE Sansepolcro (AR)

A magnitude ML 0.7 earthquake occured in region: 3 km NE Sansepolcro (AR), on

  • 22-12-2021 02:39:56 (UTC)
  • 22-12-2021 03:39:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5920, 12.1720 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
Sansepolcro AR 3 15884 15884
San Giustino PG 5 11297 27181
Anghiari AR 11 5638 32819
Citerna PG 11 3531 36350
Borgo Pace PU 12 606 36956
Monterchi AR 13 1757 38713
Badia Tedalda AR 13 1087 39800
Pieve Santo Stefano AR 14 3183 42983
Mercatello sul Metauro PU 15 1378 44361
CittĂ  di Castello PG 16 39913 84274
Caprese Michelangelo AR 16 1426 85700
Sestino AR 17 1355 87055
Monte Santa Maria Tiberina PG 17 1183 88238

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Arezzo (99543 inhabitants)
57 Km NW of Perugia (166134 inhabitants)
61 Km S of Cesena (96758 inhabitants)
61 Km SW of Rimini (147750 inhabitants)
69 Km SW of Pesaro (94582 inhabitants)
71 Km S of Forlì (117913 inhabitants)
74 Km W of Fano (60888 inhabitants)
74 Km E of Siena (53903 inhabitants)
76 Km E of Firenze (382808 inhabitants)
81 Km SE of Faenza (58541 inhabitants)
82 Km E of Scandicci (50609 inhabitants)
83 Km NW of Foligno (57155 inhabitants)
92 Km S of Ravenna (159116 inhabitants)
92 Km E of Prato (191150 inhabitants)
92 Km SE of Imola (69797 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.7 2021-12-22
02:39:56
43.592 12.172 9 2021-12-22
02:44:42
Sala Sismica INGV-Roma 98803651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-22 02:39:56 ± 0.12
Latitude 43.5920 ± 0.0045
Longitude 12.1720 ± 0.0037
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 98803651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 496
Semi-minor axis of confidence ellipse (meter) 93
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 184
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.29588
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:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 98803651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-22 02:44:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2021-12-22T02:40:03.01 0.6 undecidable manual S 280 17.9709 116 -0.06 49
IV.APEC.HHZ. 2021-12-22T02:40:03.97 0.6 undecidable manual S 100 20.2686 113 0.17 48
IV.NARO.HHZ. 2021-12-22T02:40:02.34 1.0 negative manual P 86 32.8449 50 -0.61 21
IV.APEC.HHZ. 2021-12-22T02:40:00.64 0.1 undecidable manual P 100 20.2686 113 0.07 97
IV.BADI.EHZ. 2021-12-22T02:40:00.78 0.6 undecidable manual S 148 10.7781 129 -0.19 48
IV.CRE.HHZ. 2021-12-22T02:40:00.20 0.1 undecidable manual P 280 17.9709 116 0.05 98
IV.PARC.HHZ. 2021-12-22T02:40:00.18 0.1 undecidable manual S 40 8.2806 136 -0.13 98
IV.SSP9.EHZ. 2021-12-22T02:39:59.34 0.6 undecidable manual S 238 3.7962 156 -0.1 50
IV.SSP9.EHZ. 2021-12-22T02:39:58.13 0.1 undecidable manual P 238 3.7962 156 0.08 100
IV.PARC.HHZ. 2021-12-22T02:39:58.68 0.1 undecidable manual P 40 8.2806 136 0.13 98
IV.BADI.EHZ. 2021-12-22T02:39:58.97 0.3 undecidable manual P 148 10.7781 129 0.04 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:0.9 0.00013414999999999998 0.14 AML other m 2021-12-22T02:40:00.25
IV.PARC.HHE. ML:0.8 0.00010415 0.9 AML other m 2021-12-22T02:40:00.26
IV.BADI.EHE. ML:0.5 0.00003905 1.36 AML other m 2021-12-22T02:40:00.98
IV.BADI.EHN. ML:0.6 0.0000518 0.78 AML other m 2021-12-22T02:40:01.00
IV.APEC.HHE. ML:0.6 0.00002935 0.58 AML other m 2021-12-22T02:40:05.43
IV.APEC.HHN. ML:0.6 0.000027700000000000002 1.22 AML other m 2021-12-22T02:40:06.62
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