Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-09-2020 and time 23:55:37 (UTC) in region 2 km W Castel Sant'Angelo (RI)

A magnitude ML 1.2 earthquake occured in region: 2 km W Castel Sant'Angelo (RI), on

  • 25-09-2020 23:55:37 (UTC)
  • 26-09-2020 01:55:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3940, 13.0030 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.

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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
Castel Sant'Angelo RI 2 1308 1308
Cittaducale RI 5 6828 8136
Borgo Velino RI 5 972 9108
Antrodoco RI 7 2588 11696
Micigliano RI 8 127 11823
Concerviano RI 8 291 12114
Rieti RI 12 47698 59812
Cantalice RI 12 2755 62567
Belmonte in Sabina RI 12 636 63203
Petrella Salto RI 12 1197 64400
Longone Sabino RI 14 597 64997
Rocca Sinibalda RI 15 815 65812
Poggio Bustone RI 16 2055 67867
Posta RI 16 694 68561
Borbona RI 17 617 69178
Varco Sabino RI 17 187 69365
Fiamignano RI 18 1413 70778
Torricella in Sabina RI 18 1342 72120
Rivodutri RI 18 1253 73373
Marcetelli RI 19 89 73462
Leonessa RI 19 2435 75897
Contigliano RI 20 3783 79680
Cagnano Amiterno AQ 20 1369 81049
Monte San Giovanni in Sabina RI 20 714 81763
Montenero Sabino RI 20 299 82062
Castel di Tora RI 20 288 82350

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of L'Aquila (69753 inhabitants)
35 Km SE of Terni (111501 inhabitants)
49 Km NE of Guidonia Montecelio (88673 inhabitants)
51 Km NE of Tivoli (56533 inhabitants)
65 Km W of Teramo (54892 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
70 Km NE of Roma (2864731 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
81 Km N of Velletri (53303 inhabitants)
90 Km NE of Pomezia (62966 inhabitants)
94 Km NE of Aprilia (73446 inhabitants)
94 Km NE of Fiumicino (78395 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
96 Km W of Chieti (51815 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 2020-09-25
23:55:37		 42.3938 13.0032 10 2020-09-26
00:05:28		 Sala Sismica INGV-Roma 83257211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-25 23:55:37 ± 0.05
Latitude 42.3938 ± 0.0027
Longitude 13.0032 ± 0.0037
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 83257211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 291
Semi-minor axis of confidence ellipse (meter) 285
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 171
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.15109
Epicentral distance of station farthest from the epicenter (degree) 0.44696
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 83257211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-26 00:05:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2020-09-25T23:55:53.17 0.3 undecidable manual S 10 49.617 50 0.01 73
IV.SMA1.EHZ. 2020-09-25T23:55:50.08 0.6 undecidable manual S 46 37.7289 50 0.08 49
IV.T1299.HNZ. 2020-09-25T23:55:49.28 0.3 undecidable manual S 40 35.1426 50 -0.01 75
IV.GAVE.EHZ. 2020-09-25T23:55:48.99 0.3 undecidable manual S 345 34.2435 50 -0.08 74
IV.ARRO.EHZ. 2020-09-25T23:55:47.41 0.3 undecidable manual S 317 28.2495 50 -0.06 75
IV.NRCA.HHZ. 2020-09-25T23:55:46.27 0.3 undecidable manual P 10 49.617 50 -0.14 71
IV.RM33.EHZ. 2020-09-25T23:55:45.33 0.3 undecidable manual S 53 21.4674 115 -0.07 75
IV.LNSS.HHZ. 2020-09-25T23:55:45.95 0.6 undecidable manual S 7 23.3544 113 -0.04 50
IV.SMA1.EHZ. 2020-09-25T23:55:44.76 0.6 undecidable manual P 46 37.7289 50 0.17 48
IV.GAVE.EHZ. 2020-09-25T23:55:44.03 0.3 undecidable manual P 345 34.2435 50 -0.02 75
IV.T1299.HNZ. 2020-09-25T23:55:44.11 0.6 undecidable manual P 40 35.1426 50 -0.06 49
IV.FIAM.HHZ. 2020-09-25T23:55:43.69 0.3 undecidable manual S 146 16.7721 120 -0.25 73
IV.ARRO.EHZ. 2020-09-25T23:55:43.25 0.3 undecidable manual P 317 28.2495 50 0.12 74
IV.RM33.EHZ. 2020-09-25T23:55:42.02 0.1 undecidable manual P 53 21.4674 115 0.1 100
IV.LNSS.HHZ. 2020-09-25T23:55:42.32 0.3 undecidable manual P 7 23.3544 113 0.05 75
IV.FIAM.HHZ. 2020-09-25T23:55:41.27 0.1 undecidable manual P 146 16.7721 120 0.19 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIAM.HHE. ML:0.7 0.00004377837 0.1024 AML other m 2020-09-25T23:55:43.83
IV.FIAM.HHN. ML:0.8 0.000050610405 0.7168 AML other m 2020-09-25T23:55:43.76
IV.FIAM.HNN. ML:1.1 0.000109172375 0.448 AML other m 2020-09-25T23:55:43.92
IV.RM33.EHE. ML:1.3 0.00012945604999999998 0.1664 AML other m 2020-09-25T23:55:45.93
IV.RM33.EHN. ML:1.0 0.000077087215 1.5488 AML other m 2020-09-25T23:55:45.45
IV.RM33.HNE. ML:1.3 0.00014364836000000002 0.1664 AML other m 2020-09-25T23:55:45.93
IV.RM33.HNN. ML:1.3 0.00012874445000000002 1.792 AML other m 2020-09-25T23:55:45.36
IV.LNSS.HHE. ML:1.2 0.00008805367499999999 1.344 AML other m 2020-09-25T23:55:46.09
IV.LNSS.HHN. ML:1.2 0.000107831225 0.3584 AML other m 2020-09-25T23:55:46.80
IV.LNSS.HNE. ML:1.3 0.00011781225 1.9328 AML other m 2020-09-25T23:55:46.77
IV.LNSS.HNN. ML:1.2 0.00010752982499999999 1.3696 AML other m 2020-09-25T23:55:46.34
IV.ARRO.EHE. ML:0.9 0.000045861445 1.4592 AML other m 2020-09-25T23:55:48.26
IV.ARRO.EHN. ML:0.9 0.000041455245 0.4992 AML other m 2020-09-25T23:55:47.81
IV.GAVE.EHE. ML:1.1 0.00005356627 0.2816 AML other m 2020-09-25T23:55:49.15
IV.GAVE.EHN. ML:1.1 0.00005315768 0.1536 AML other m 2020-09-25T23:55:49.36
IV.GAVE.HNE. ML:1.3 0.00008295934500000001 0.9984 AML other m 2020-09-25T23:55:49.77
IV.NRCA.HHE. ML:1.5 0.00008345382500000001 1.3056 AML other m 2020-09-25T23:55:53.51
IV.NRCA.HHN. ML:1.3 0.00005580161 1.5872 AML other m 2020-09-25T23:55:53.46
IV.NRCA.HNE. ML:1.7 0.00011857632500000001 0.832 AML other m 2020-09-25T23:55:53.51
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