Earthquake with magnitude of ML 1.1 on date 07-12-2021 and time 02:56:42 (UTC) in region 4 km W Arquata del Tronto (AP)

A magnitude ML 1.1 earthquake occured in region: 4 km W Arquata del Tronto (AP), on

  • 07-12-2021 02:56:42 (UTC)
  • 07-12-2021 03:56:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.25 at 12 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
Arquata del Tronto AP 4 1178 1178
Accumoli RI 9 667 1845
Montegallo AP 10 523 2368
Norcia PG 13 4957 7325
Acquasanta Terme AP 13 2916 10241
Montemonaco AP 15 604 10845
Castelsantangelo sul Nera MC 15 281 11126
Amatrice RI 17 2657 13783
Cittareale RI 19 482 14265
Montefortino FM 20 1178 15443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Teramo (54892 inhabitants)
49 Km E of Foligno (57155 inhabitants)
49 Km N of L'Aquila (69753 inhabitants)
55 Km E of Terni (111501 inhabitants)
79 Km E of Perugia (166134 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
86 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
96 Km S of Ancona (100861 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NE of Tivoli (56533 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 1.1 2021-12-07
02:56:42
42.7795 13.2498 12 2021-12-07
04:14:47
Sala Sismica INGV-Roma 98228241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-07 02:56:42 ± 0.03
Latitude 42.7795 ± 0.0027
Longitude 13.2498 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98228241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 52
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.10972
Epicentral distance of station farthest from the epicenter (degree) 0.33815
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 98228241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-07 04:14:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESI.HNE. 2021-12-07T02:56:54.80 0.1 undecidable manual S 312 0.3381 92 -0.19 92
IV.CSP1.EHZ. 2021-12-07T02:56:54.58 0.3 undecidable manual S 354 0.3139 92 0.33 68
IV.FDMO.HHE. 2021-12-07T02:56:53.32 0.3 undecidable manual S 335 0.2833 92 -0.02 72
IV.TERO.HHZ. 2021-12-07T02:56:53.86 0.3 undecidable manual S 121 0.304 92 -0.09 71
IV.CAMP.HHE. 2021-12-07T02:56:52.96 0.1 undecidable manual S 154 0.2698 92 0 97
IV.LNSS.HNZ. 2021-12-07T02:56:51.92 0.1 undecidable manual S 221 0.2338 93 0.03 98
IV.MC2.EHZ. 2021-12-07T02:56:49.30 0.1 undecidable manual S 341 0.1394 103 0.2 96
IV.TERO.HHZ. 2021-12-07T02:56:49.06 0.1 undecidable manual P 121 0.304 92 -0.05 96
IV.SMA1.EHZ. 2021-12-07T02:56:49.69 0.1 undecidable manual S 157 0.1619 98 -0.06 99
IV.CESI.HNE. 2021-12-07T02:56:49.62 0.1 undecidable manual P 312 0.3381 92 -0.09 94
IV.CSP1.EHZ. 2021-12-07T02:56:49.27 0.1 undecidable manual P 354 0.3139 92 -0.01 96
IV.CAMP.HHE. 2021-12-07T02:56:48.40 0.1 undecidable manual P 154 0.2698 92 -0.14 95
IV.LNSS.HNZ. 2021-12-07T02:56:48.14 0.1 undecidable manual P 221 0.2338 93 0.22 94
IV.NRCA.HHZ. 2021-12-07T02:56:48.13 0.1 undecidable manual S 299 0.1133 114 -0.24 96
IV.MTRA.EHZ. 2021-12-07T02:56:48.19 0.1 undecidable manual S 102 0.1097 115 -0.09 99
IV.FDMO.HHE. 2021-12-07T02:56:48.59 0.1 undecidable manual P 335 0.2833 92 -0.17 94
IV.MC2.EHZ. 2021-12-07T02:56:46.46 0.1 undecidable manual P 341 0.1394 103 0.15 97
IV.SMA1.EHZ. 2021-12-07T02:56:46.73 0.1 undecidable manual P 157 0.1619 98 0.05 98
IV.MTRA.EHZ. 2021-12-07T02:56:45.93 0.1 undecidable manual P 102 0.1097 115 0.09 98
IV.NRCA.HHZ. 2021-12-07T02:56:45.90 0.1 undecidable manual P 299 0.1133 114 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.000143531255 0.1808 AML other m 2021-12-07T02:56:48.69
IV.NRCA.HHE. ML:1.3 0.000222 0.08 AML other m 2021-12-07T02:56:48.50
IV.NRCA.HNE. ML:1.3 0.00019806595 0.08 AML other m 2021-12-07T02:56:48.50
IV.NRCA.HNN. ML:1 0.00010188767 0.0704 AML other m 2021-12-07T02:56:48.29
IV.MTRA.EHE. ML:0.9 7.414003E-5 0.1008 AML other m 2021-12-07T02:56:48.32
IV.MTRA.EHN. ML:0.8 6.3513225E-5 0.1008 AML other m 2021-12-07T02:56:48.26
IV.MTRA.HNE. ML:0.9 8.6949805E-5 0.1104 AML other m 2021-12-07T02:56:48.32
IV.MC2.EHE. ML:0.9 6.43917E-5 0.16 AML other m 2021-12-07T02:56:50.83
IV.MC2.EHN. ML:1.1 0.0001099456 0.16 AML other m 2021-12-07T02:56:51.07
IV.SMA1.EHE. ML:0.9 6.1796125E-5 0.2 AML other m 2021-12-07T02:56:49.80
IV.SMA1.EHN. ML:1.1 9.760712E-5 1.9392 AML other m 2021-12-07T02:56:56.43
IV.TERO.HHE. ML:1.4 0.000106493845 0.48 AML other m 2021-12-07T02:57:05.77
IV.TERO.HHN. ML:1.1 5.3413565E-5 0.0608 AML other m 2021-12-07T02:56:54.61
IV.TERO.HNE. ML:1.1 5.0617475E-5 0.0704 AML other m 2021-12-07T02:56:54.41
IV.TERO.HNN. ML:1.1 5.085701E-5 0.12 AML other m 2021-12-07T02:56:54.52
IV.CSP1.EHE. ML:1.6 0.00014484945 1.3392 AML other m 2021-12-07T02:56:52.78
IV.CSP1.EHN. ML:1.5 0.00013130115 1.8784 AML other m 2021-12-07T02:57:05.54
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