Earthquake with magnitude of ML 0.9 on date 23-12-2021 and time 23:57:40 (Italy) in region 7 km SW Serravalle di Chienti (MC)

A magnitude ML 0.9 earthquake occured in region: 7 km SW Serravalle di Chienti (MC), on

  • 23-12-2021 22:57:40 (UTC)
  • 23-12-2021 23:57:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.0200, 12.9120 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
Serravalle di Chienti MC 7 1070 1070
Monte Cavallo MC 8 145 1215
Pieve Torina MC 12 1458 2673
Muccia MC 13 915 3588
Valtopina PG 14 1398 4986
Nocera Umbra PG 14 5839 10825
Sefro MC 15 422 11247
Sellano PG 15 1079 12326
Fiordimonte MC 15 202 12528
Pievebovigliana MC 15 866 13394
Visso MC 18 1107 14501
Camerino MC 18 6974 21475
Foligno PG 18 57155 78630
Pioraco MC 19 1134 79764
Preci PG 19 724 80488
Fiuminata MC 19 1402 81890
Spello PG 20 8645 90535

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
55 Km NE of Terni (111501 inhabitants)
76 Km NW of Teramo (54892 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
84 Km NW of L'Aquila (69753 inhabitants)
92 Km S of Fano (60888 inhabitants)
94 Km NE of Viterbo (67173 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
99 Km S of Pesaro (94582 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 0.9 2021-12-23
22:57:40
43.02 12.9117 10 2021-12-23
23:20:41
Sala Sismica INGV-Roma 98874191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:57:40 ± 0.04
Latitude 43.0200 ± 0.0018
Longitude 12.9117 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98874191

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 193
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 154
Circular confidence region, given by single value of horizontal uncertainty (meter) 190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32825
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98874191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 23:20:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-12-23T22:57:53.49 0.1 undecidable manual S 182 36.4413 50 0.08 94
IV.ATCC.EHZ. 2021-12-23T22:57:51.29 0.1 undecidable manual S 310 28.6491 50 -0.05 96
IV.CSP1.EHZ. 2021-12-23T22:57:50.22 0.1 undecidable manual S 71 25.0527 111 0.04 97
IV.SNTG.HHZ. 2021-12-23T22:57:50.61 0.1 undecidable manual S 5 26.1516 110 0.07 96
IV.NRCA.HHZ. 2021-12-23T22:57:50.41 0.1 undecidable manual S 141 26.4513 110 -0.22 93
IV.CING.HHZ. 2021-12-23T22:57:49.30 3.0 negative manual P -0.18 0
IV.ASSB.HHZ. 2021-12-23T22:57:48.78 0.1 undecidable manual S 277 20.6682 115 0.01 98
IV.GAVE.EHZ. 2021-12-23T22:57:48.13 0.3 negative manual P 182 36.4413 50 0.02 71
IV.ATCC.EHZ. 2021-12-23T22:57:47.31 1.0 undecidable manual P 310 28.6491 50 0.39 22
IV.FDMO.HHZ. 2021-12-23T22:57:47.06 0.1 undecidable manual S 83 14.3745 123 0.21 95
IV.SNTG.HHZ. 2021-12-23T22:57:46.16 0.6 undecidable manual P 5 26.1516 110 -0.3 46
IV.NRCA.HHZ. 2021-12-23T22:57:46.40 1.0 undecidable manual P 141 26.4513 110 -0.11 24
IV.CSP1.EHZ. 2021-12-23T22:57:46.13 0.3 negative manual P 71 25.0527 111 -0.12 71
IV.ASSB.HHZ. 2021-12-23T22:57:45.39 0.1 positive manual P 277 20.6682 115 -0.05 97
IV.MML1.EHZ. 2021-12-23T22:57:45.90 0.1 undecidable manual S 25 11.4774 130 -0.14 97
IV.FDMO.HHZ. 2021-12-23T22:57:44.38 0.3 positive manual P 83 14.3745 123 0.05 74
IV.CESI.HHZ. 2021-12-23T22:57:44.30 0.1 undecidable manual S 199 1.7982 169 0.07 100
IV.MML1.EHZ. 2021-12-23T22:57:43.90 0.6 positive manual P 25 11.4774 130 0.04 50
IV.CESI.HHZ. 2021-12-23T22:57:42.93 0.6 undecidable manual P 199 1.7982 169 0.12 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.EHE. ML:1.3 0.00023700000000000001 0.18 AML other m 2021-12-23T22:57:46.02
IV.MML1.EHN. ML:1.0 0.00011094999999999999 0.4 AML other m 2021-12-23T22:57:46.25
IV.FDMO.HHN. ML:0.8 0.000060700000000000005 1.18 AML other m 2021-12-23T22:57:46.97
IV.FDMO.HHE. ML:0.6 0.000046949999999999996 0.22 AML other m 2021-12-23T22:57:48.26
IV.ASSB.HHE. ML:0.8 0.00005015 0.3 AML other m 2021-12-23T22:57:48.87
IV.ASSB.HHN. ML:1.1 0.000083 0.2 AML other m 2021-12-23T22:57:48.84
IV.SNTG.HHN. ML:1.1 0.0000714 0.12 AML other m 2021-12-23T22:57:50.67
IV.NRCA.HHE. ML:0.8 0.00003695 0.12 AML other m 2021-12-23T22:57:50.69
IV.NRCA.HHN. ML:0.9 0.00004615 0.28 AML other m 2021-12-23T22:57:50.72
IV.SNTG.HHE. ML:1.1 0.00007175000000000001 0.1 AML other m 2021-12-23T22:57:50.82
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download