Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 31-10-2021 and time 13:13:37 (Italy) in region 5 km SE Capitignano (AQ)

A magnitude ML 1.2 earthquake occured in region: 5 km SE Capitignano (AQ), on

  • 31-10-2021 12:13:37 (UTC)
  • 31-10-2021 13:13:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4830, 13.3340 at 11 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Capitignano AQ 5 665 665
Barete AQ 6 737 1402
Pizzoli AQ 6 4326 5728
Montereale AQ 9 2581 8309
Campotosto AQ 9 542 8851
Cagnano Amiterno AQ 9 1369 10220
Scoppito AQ 14 3727 13947
Crognaleto TE 14 1297 15244
L'Aquila AQ 16 69753 84997
Amatrice RI 17 2657 87654
Borbona RI 17 617 88271
Fano Adriano TE 18 296 88567
Pietracamela TE 19 271 88838

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of L'Aquila (69753 inhabitants)
36 Km SW of Teramo (54892 inhabitants)
57 Km E of Terni (111501 inhabitants)
67 Km W of Montesilvano (53738 inhabitants)
70 Km W of Chieti (51815 inhabitants)
72 Km W of Pescara (121014 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
73 Km NE of Guidonia Montecelio (88673 inhabitants)
74 Km SE of Foligno (57155 inhabitants)
96 Km NE of Roma (2864731 inhabitants)
100 Km NE of Velletri (53303 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 1.2 2021-10-31
12:13:37		 42.483 13.3342 11 2021-10-31
12:18:02		 Sala Sismica INGV-Roma 97110391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-31 12:13:37 ± 0.17
Latitude 42.4830 ± 0.0081
Longitude 13.3342 ± 0.0073
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97110391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 949
Semi-minor axis of confidence ellipse (meter) 609
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 166
Circular confidence region, given by single value of horizontal uncertainty (meter) 950.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 231
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.44157
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 97110391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-31 12:18:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MC2.EHZ. 2021-10-31T12:13:54.01 0.3 undecidable manual S 346 49.0176 50 0.6 62
IV.NRCA.HHZ. 2021-10-31T12:13:51.54 0.3 undecidable manual S 335 42.8238 50 -0.23 70
IV.GAVE.EHZ. 2021-10-31T12:13:51.65 0.3 undecidable manual S 303 42.7239 50 -0.1 71
IV.MNTT.EHZ. 2021-10-31T12:13:49.21 3.0 undecidable manual P -0.4 0
IV.LNSS.HHZ. 2021-10-31T12:13:47.64 0.3 undecidable manual S 299 27.4503 50 -0.02 75
IV.MC2.EHZ. 2021-10-31T12:13:46.75 0.1 undecidable manual P 346 49.0176 50 -0.08 95
IV.NRCA.HHZ. 2021-10-31T12:13:45.66 0.1 undecidable manual P 335 42.8238 50 -0.22 93
IV.GAVE.EHZ. 2021-10-31T12:13:45.88 0.1 undecidable manual P 303 42.7239 50 0.01 97
IV.SMA1.EHZ. 2021-10-31T12:13:44.55 0.3 undecidable manual S 0 16.3725 124 -0.11 75
IV.LNSS.HHZ. 2021-10-31T12:13:43.62 0.1 undecidable manual P 299 27.4503 50 0.11 98
IV.TERO.HHZ. 2021-10-31T12:13:43.43 0.1 undecidable manual P 55 26.9508 50 -0.01 100
IV.RM33.EHZ. 2021-10-31T12:13:43.05 0.3 undecidable manual S 286 10.1787 137 0.03 77
IV.RM33.EHZ. 2021-10-31T12:13:41.13 1.0 undecidable manual P 286 10.1787 137 0.3 24
IV.SMA1.EHZ. 2021-10-31T12:13:41.87 0.6 positive manual P 0 16.3725 124 0.09 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.0 0.00013505295 0.224 AML other m 2021-10-31T12:13:44.22
IV.RM33.EHN. ML:1.0 0.00011232529999999999 0.1792 AML other m 2021-10-31T12:13:43.24
IV.SMA1.EHN. ML:1.4 0.0002081787 0.2432 AML other m 2021-10-31T12:13:45.19
IV.SMA1.EHE. ML:1.3 0.00017094579999999999 0.1856 AML other m 2021-10-31T12:13:44.98
IV.LNSS.HHN. ML:0.9 0.0000439 1.8 AML other m 2021-10-31T12:13:47.93
IV.LNSS.HHE. ML:1.0 0.000051200000000000004 1.06 AML other m 2021-10-31T12:13:48.42
IV.NRCA.HHE. ML:1.4 0.00007600000000000002 0.12 AML other m 2021-10-31T12:13:51.69
IV.NRCA.HHN. ML:1.2 0.00004425296 0.1024 AML other m 2021-10-31T12:13:53.87
IV.RM33.HNE. ML:1.2 0.00017749555 0.2432 AML other m 2021-10-31T12:13:44.11
IV.RM33.HNN. ML:1.0 0.000127913645 0.2624 AML other m 2021-10-31T12:13:44.07
IV.TERO.HHE. ML:1.0 0.000061956295 0.4992 AML other m 2021-10-31T12:13:54.31
IV.TERO.HHN. ML:0.9 0.000040911900000000004 0.2432 AML other m 2021-10-31T12:13:50.05
IV.TERO.HNE. ML:1.2 0.000096675385 0.7168 AML other m 2021-10-31T12:13:59.38
IV.TERO.HNN. ML:1.5 0.00018100595 0.8832 AML other m 2021-10-31T12:13:43.18
IV.LNSS.HNE. ML:1.4 0.00012982125 0.704 AML other m 2021-10-31T12:13:57.16
IV.LNSS.HNN. ML:1.5 0.00017729035 0.8896 AML other m 2021-10-31T12:13:53.22
IV.NRCA.HNE. ML:1.5 0.00010825920000000001 0.672 AML other m 2021-10-31T12:14:05.59
IV.NRCA.HNN. ML:1.7 0.000158143225 0.7936 AML other m 2021-10-31T12:14:00.46
IV.GAVE.HNE. ML:1.7 0.00017226423700000002 0.8128 AML other m 2021-10-31T12:13:53.39
IV.GAVE.HNN. ML:1.8 0.00018038505 1.0112 AML other m 2021-10-31T12:14:06.57
IV.GAVE.EHE. ML:0.8 0.000020439405 0.1792 AML other m 2021-10-31T12:13:52.59
IV.GAVE.EHN. ML:0.7 0.0000147180165 0.16 AML other m 2021-10-31T12:13:56.31
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