Earthquake with magnitude of ML 1.4 on date 20-11-2021 and time 01:05:32 (UTC) in region 1 km N Borgo Velino (RI)

A magnitude ML 1.4 earthquake occured in region: 1 km N Borgo Velino (RI), on

  • 20-11-2021 01:05:32 (UTC)
  • 20-11-2021 02:05:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.419, 13.064 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Antrodoco RI 1 2588 2588
Borgo Velino RI 1 972 3560
Castel Sant'Angelo RI 4 1308 4868
Micigliano RI 4 127 4995
Cittaducale RI 10 6828 11823
Borbona RI 12 617 12440
Posta RI 12 694 13134
Concerviano RI 12 291 13425
Petrella Salto RI 14 1197 14622
Cagnano Amiterno AQ 14 1369 15991
Cantalice RI 14 2755 18746
Rieti RI 17 47698 66444
Scoppito AQ 17 3727 70171
Poggio Bustone RI 17 2055 72226
Belmonte in Sabina RI 18 636 72862
Fiamignano RI 18 1413 74275
Leonessa RI 18 2435 76710
Longone Sabino RI 18 597 77307
Barete AQ 18 737 78044
Montereale AQ 19 2581 80625
Pizzoli AQ 19 4326 84951
Rocca Sinibalda RI 20 815 85766

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km W of L'Aquila (69753 inhabitants)
38 Km E of Terni (111501 inhabitants)
54 Km NE of Guidonia Montecelio (88673 inhabitants)
55 Km NE of Tivoli (56533 inhabitants)
59 Km W of Teramo (54892 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
75 Km NE of Roma (2864731 inhabitants)
79 Km E of Viterbo (67173 inhabitants)
85 Km N of Velletri (53303 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
91 Km W of Chieti (51815 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km NE of Pomezia (62966 inhabitants)
98 Km NE of Aprilia (73446 inhabitants)
99 Km NE of Fiumicino (78395 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-11-20
01:05:32
42.4188 13.0637 11 2021-11-20
01:12:21
Sala Sismica INGV-Roma 97611811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-20 01:05:32 ± 0.1
Latitude 42.4188 ± 0.0036
Longitude 13.0637 ± 0.0097
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 97611811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 769
Semi-minor axis of confidence ellipse (meter) 331
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 770
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 190
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.51801
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.7
Num. used stations 12
Type of magnitude ML
Reference to an origin 97611811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-20 01:12:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-11-20T01:06:26.66 3.0 undecidable manual Sn -0.13 0
IV.MMO1.EHZ. 2021-11-20T01:05:50.23 0.1 undecidable manual S 22 0.518 50 0.27 90
IV.NRCA.HHZ. 2021-11-20T01:05:47.02 0.1 undecidable manual S 5 0.4164 50 0.07 95
IV.SMA1.EHZ. 2021-11-20T01:05:43.29 0.1 undecidable manual S 43 0.2914 50 0.04 98
IV.MMO1.EHZ. 2021-11-20T01:05:42.23 0.1 undecidable manual P 22 0.518 50 -0.16 92
IV.NRCA.HHZ. 2021-11-20T01:05:40.50 0.1 undecidable manual P 5 0.4164 50 -0.16 94
IV.FIAM.HHZ. 2021-11-20T01:05:39.04 0.3 undecidable manual S 165 0.1556 122 -0.06 75
IV.LNSS.HHZ. 2021-11-20T01:05:39.96 0.1 undecidable manual S 355 0.1844 117 -0.11 99
IV.SMA1.EHZ. 2021-11-20T01:05:38.22 0.1 undecidable manual P 43 0.2914 50 -0.3 93
IV.RM33.EHZ. 2021-11-20T01:05:38.59 0.1 undecidable manual S 51 0.143 124 -0.1 100
IV.RM33.EHZ. 2021-11-20T01:05:36.09 0.1 positive manual P 51 0.143 124 0.2 98
IV.FIAM.HHZ. 2021-11-20T01:05:36.25 0.1 undecidable manual P 165 0.1556 122 0.13 99
IV.LNSS.HHZ. 2021-11-20T01:05:36.83 0.1 undecidable manual P 355 0.1844 117 0.15 98
IV.LAV9.HHZ. 2021-11-20T01:05:31.87 3.0 undecidable manual P -0.04 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.4 0.0002375 1.7 AML other m 2021-11-20T01:05:39.00
IV.RM33.EHN. ML:1 8.325E-5 1.38 AML other m 2021-11-20T01:05:39.75
IV.FIAM.HHN. ML:0.5 2.615E-5 0.5 AML other m 2021-11-20T01:05:39.39
IV.FIAM.HHE. ML:0.4 2.055E-5 0.5 AML other m 2021-11-20T01:05:39.44
IV.LNSS.HHE. ML:1.1 8.955E-5 0.84 AML other m 2021-11-20T01:05:40.73
IV.LNSS.HHN. ML:1.2 9.905E-5 0.16 AML other m 2021-11-20T01:05:41.11
IV.NRCA.HHN. ML:1.2 5.03E-5 1.9 AML other m 2021-11-20T01:05:48.02
IV.NRCA.HHE. ML:1.5 9.52E-5 0.12 AML other m 2021-11-20T01:05:48.10
IV.FIR.HNE. ML:3.3 0.0005545 0.22 AML other m 2021-11-20T01:06:30.56
IV.FIR.HHE. ML:3.4 0.0006195 0.22 AML other m 2021-11-20T01:06:30.56
IV.FIR.HHN. ML:3.1 0.0003525 0.08 AML other m 2021-11-20T01:06:41.25
IV.FIR.HNN. ML:3.1 0.0003675 1.22 AML other m 2021-11-20T01:06:41.38
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