Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 01-09-2021 and time 01:51:34 (Italy) in region 4 km N Fiamignano (RI)

A magnitude ML 1.6 earthquake occured in region: 4 km N Fiamignano (RI), on

  • 31-08-2021 23:51:34 (UTC)
  • 01-09-2021 01:51:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3010, 13.1410 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Fiamignano RI 4 1413 1413
Petrella Salto RI 6 1197 2610
Pescorocchiano RI 11 2075 4685
Marcetelli RI 11 89 4774
Varco Sabino RI 12 187 4961
Scoppito AQ 12 3727 8688
Concerviano RI 13 291 8979
Tornimparte AQ 13 3187 12166
Borgo Velino RI 14 972 13138
Castel Sant'Angelo RI 14 1308 14446
Antrodoco RI 14 2588 17034
Borgorose RI 14 4591 21625
Longone Sabino RI 15 597 22222
Lucoli AQ 16 1011 23233
Collegiove RI 16 213 23446
Ascrea RI 17 234 23680
Paganico Sabino RI 17 172 23852
Nespolo RI 17 246 24098
Castel di Tora RI 17 288 24386
Rocca Sinibalda RI 18 815 25201
Micigliano RI 18 127 25328
Cittaducale RI 19 6828 32156
Colle di Tora RI 19 372 32528
Cagnano Amiterno AQ 19 1369 33897
Collalto Sabino RI 20 442 34339
Pizzoli AQ 20 4326 38665

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of L'Aquila (69753 inhabitants)
47 Km NE of Tivoli (56533 inhabitants)
48 Km NE of Guidonia Montecelio (88673 inhabitants)
50 Km SE of Terni (111501 inhabitants)
61 Km SW of Teramo (54892 inhabitants)
71 Km NE of Roma (2864731 inhabitants)
75 Km NE of Velletri (53303 inhabitants)
81 Km SE of Foligno (57155 inhabitants)
85 Km W of Chieti (51815 inhabitants)
86 Km E of Viterbo (67173 inhabitants)
86 Km W of Montesilvano (53738 inhabitants)
88 Km NE of Pomezia (62966 inhabitants)
88 Km NE of Aprilia (73446 inhabitants)
90 Km W of Pescara (121014 inhabitants)
95 Km N of Latina (125985 inhabitants)
95 Km NE of Fiumicino (78395 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
Bulletin
Rev1000 		ML 1.6 2021-08-31
23:51:34		 42.3012 13.1407 10 2021-12-29
11:12:52		 Bollettino Sismico Italiano INGV 97525281
Reviewed
Rev100 		ML 1.7 2021-08-31
23:51:34		 42.3003 13.1428 10 2021-08-31
23:58:11		 Sala Sismica INGV-Roma 94891361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 23:51:34 ± 0.05
Latitude 42.3012 ± 0.0027
Longitude 13.1407 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97525281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 111
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 38
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) 0.03777
Epicentral distance of station farthest from the epicenter (degree) 0.73565
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 28
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 14
Type of magnitude ML
Reference to an origin 97525281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-17 17:29:28

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 94891361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 23:58:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2021-08-31T23:51:49.13 1.0 undecidable manual P 19 80.4639 50 0.18 21
IV.ARRO.EHZ. 2021-08-31T23:51:49.64 0.6 undecidable manual S 315 43.5231 50 0.31 44
IV.MTCE.HHZ. 2021-08-31T23:51:49.52 0.3 undecidable manual S 227 45.0216 50 -0.22 67
IV.FDMO.HHZ. 2021-08-31T23:51:48.98 1.0 undecidable manual P 357 81.6516 50 -0.16 21
IV.SMA1.EHZ. 2021-08-31T23:51:48.69 0.3 undecidable manual S 23 39.8268 50 0.33 66
IV.MOMA.HHZ. 2021-08-31T23:51:47.98 1.0 undecidable manual P 320 72.6717 50 0.23 21
IV.PTQR.HHZ. 2021-08-31T23:51:47.75 0.3 undecidable manual S 145 37.629 50 -0.02 71
IV.LNSS.HHZ. 2021-08-31T23:51:47.25 0.6 undecidable manual S 346 34.4433 50 0.33 44
IV.MMO1.EHN. 2021-08-31T23:51:47.03 0.6 undecidable manual P 13 68.0763 50 -0.01 45
IV.MC2.EHZ. 2021-08-31T23:51:47.05 0.6 undecidable manual P 3 67.7766 50 0.05 44
IV.VCEL.EHN. 2021-08-31T23:51:46.39 1.0 undecidable manual P 80 58.2972 50 0.86 18
IV.CAMP.HHE. 2021-08-31T23:51:46.23 0.3 undecidable manual S 40 34.0437 50 -0.58 62
IV.VVLD.HHZ. 2021-08-31T23:51:46.47 1.0 undecidable manual P 140 62.1933 50 0.33 21
IV.T0110.HHZ. 2021-08-31T23:51:45.14 1.0 undecidable manual P 98 52.8027 50 0.46 21
IV.CESX.HHZ. 2021-08-31T23:51:45.36 1.0 undecidable manual P 307 56.6988 50 0.07 23
IV.MTRA.EHE. 2021-08-31T23:51:45.41 1.0 undecidable manual P 22 54.7008 50 0.43 21
IV.NRCA.HHZ. 2021-08-31T23:51:45.29 0.6 undecidable manual P 358 59.0964 50 -0.37 42
IV.TERO.HHN. 2021-08-31T23:51:44.96 0.6 undecidable manual P 47 52.0035 50 0.39 43
IV.RCAV.EHZ. 2021-08-31T23:51:44.69 1.0 undecidable manual P 198 52.9026 50 -0.01 23
IV.RM33.EHZ. 2021-08-31T23:51:44.18 0.3 undecidable manual S 15 23.8539 112 0.31 68
IV.ARRO.EHZ. 2021-08-31T23:51:43.16 0.3 undecidable manual P 315 43.5231 50 -0.1 69
IT.CSO1.HGN. 2021-08-31T23:51:43.50 0.3 undecidable manual S 191 22.6551 113 0.01 73
IV.MTCE.HHZ. 2021-08-31T23:51:43.57 0.1 undecidable manual P 227 45.0216 50 0.08 92
IV.GAVE.EHZ. 2021-08-31T23:51:43.58 1.0 undecidable manual P 335 47.8188 50 -0.34 22
MN.AQU.HHE. 2021-08-31T23:51:43.43 0.6 undecidable manual S 75 22.4553 113 0.01 49
IV.SMA1.EHZ. 2021-08-31T23:51:42.57 0.1 undecidable manual P 23 39.8268 50 -0.12 92
IV.CERT.HHZ. 2021-08-31T23:51:42.89 0.3 undecidable manual P 199 41.2254 50 -0.01 70
IV.GIGS.HHN. 2021-08-31T23:51:42.33 0.6 undecidable manual P 64 39.2274 50 -0.26 45
IV.PTQR.HHZ. 2021-08-31T23:51:42.47 0.3 undecidable manual P 145 37.629 50 0.12 69
IV.T1299.HNN. 2021-08-31T23:51:42.31 0.3 undecidable manual P 17 38.7279 50 -0.2 68
IV.LNSS.HHZ. 2021-08-31T23:51:41.73 0.1 undecidable manual P 346 34.4433 50 -0.13 93
IV.FAGN.HHZ. 2021-08-31T23:51:41.91 0.6 undecidable manual P 96 36.5412 50 -0.28 45
IV.CAMP.HHE. 2021-08-31T23:51:41.68 0.1 undecidable manual P 40 34.0437 50 -0.12 93
IV.RM33.EHZ. 2021-08-31T23:51:40.00 0.1 positive manual P 15 23.8539 112 -0.09 95
IT.CSO1.HGN. 2021-08-31T23:51:40.21 0.1 undecidable manual P 191 22.6551 113 0.34 91
MN.AQU.HHE. 2021-08-31T23:51:39.88 0.1 undecidable manual P 75 22.4553 113 0.04 96
IV.FIAM.HHZ. 2021-08-31T23:51:38.24 0.3 undecidable manual S 208 4.1958 157 -0.35 70
IV.FIAM.HHZ. 2021-08-31T23:51:37.03 0.1 negative manual P 208 4.1958 157 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:1.5 0.0000989 1.02 AML other m 2021-08-31T23:51:51.20
IV.GAVE.EHE. ML:1.7 0.0001395 0.5 AML other m 2021-08-31T23:51:53.91
IV.ARRO.EHE. ML:1.6 0.00011949999999999999 0.48 AML other m 2021-08-31T23:51:54.43
IV.GAVE.EHN. ML:1.8 0.000177 0.36 AML other m 2021-08-31T23:51:55.19
IV.NRCA.HHE. ML:1.6 0.0000774 0.14 AML other m 2021-08-31T23:51:55.78
IV.NRCA.HHN. ML:1.6 0.00007384999999999999 0.14 AML other m 2021-08-31T23:51:55.79
IV.SMA1.EHN. ML:1.7 0.000169 0.76 AML other m 2021-08-31T23:51:55.89
IV.T0110.HHN. ML:1.8 0.00014049999999999997 0.38 AML other m 2021-08-31T23:51:57.96
IV.MOMA.HHN. ML:1.7 0.00007549999999999999 0.2 AML other m 2021-08-31T23:51:58.52
IV.CESX.HHN. ML:1.5 0.00007205 1.02 AML other m 2021-08-31T23:51:58.63
IV.SMA1.EHE. ML:1.6 0.0001275 0.48 AML other m 2021-08-31T23:51:59.39
IV.CESX.HHE. ML:1.5 0.00007505000000000001 0.82 AML other m 2021-08-31T23:51:59.53
IV.MOMA.HHE. ML:1.7 0.00008555 0.68 AML other m 2021-08-31T23:52:01.64
IV.T0110.HHE. ML:1.6 0.0000911 0.56 AML other m 2021-08-31T23:52:03.50
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