Earthquake with magnitude of ML 1.4 on date 25-09-2021 and time 08:45:18 (Italy) in region 4 km SW Accumoli (RI)

A magnitude ML 1.4 earthquake occured in region: 4 km SW Accumoli (RI), on

  • 25-09-2021 06:45:18 (UTC)
  • 25-09-2021 08:45:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.677, 13.21 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Accumoli RI 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 8 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 16 4957 9941
Cascia PG 17 3217 13158
Montereale AQ 17 2581 15739
Campotosto AQ 19 542 16281
Capitignano AQ 19 665 16946
Borbona RI 19 617 17563
Posta RI 19 694 18257
Acquasanta Terme AP 19 2916 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
87 Km W of Chieti (51815 inhabitants)
95 Km E of Viterbo (67173 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-09-25
06:45:18
42.6773 13.2097 11 2021-09-25
06:54:36
Sala Sismica INGV-Roma 95860671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-25 06:45:18 ± 0.07
Latitude 42.6773 ± 0.0045
Longitude 13.2097 ± 0.0061
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95860671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 482
Semi-minor axis of confidence ellipse (meter) 430
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 150
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41459
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 95860671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-25 06:54:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.CIMO.HHZ. 2021-09-25T06:46:57.69 3.0 undecidable manual Sg 5.04 0
IV.TREG.EHZ. 2021-09-25T06:46:51.06 3.0 undecidable manual Sg 8.56 0
IV.FREG.EHZ. 2021-09-25T06:46:44.72 3.0 undecidable manual Sn -1.25 0
SL.LJU.BHZ. 2021-09-25T06:46:38.72 3.0 undecidable manual Sn -8.27 0
IV.NDIM.HNZ. 2021-09-25T06:46:37.48 3.0 undecidable manual Sg 4.82 0
IV.MILZ.HHZ. 2021-09-25T06:46:33.20 3.0 undecidable manual Pg 7.03 0
MN.PDG.HHZ. 2021-09-25T06:46:28.57 3.0 undecidable manual Pn 7.61 0
IV.QLNO.HHZ. 2021-09-25T06:46:21.55 3.0 undecidable manual Pn 5.75 0
IV.IST3.HHZ. 2021-09-25T06:46:17.79 3.0 positive manual Pn -1.49 0
IV.GRIS.EHZ. 2021-09-25T06:46:10.48 3.0 undecidable manual Pn 0.22 0
IV.SEI.HHZ. 2021-09-25T06:45:52.97 3.0 undecidable manual Pg 5.05 0
IX.RSF3.HHZ.02 2021-09-25T06:45:52.14 3.0 undecidable manual Pn -0.16 0
IV.PESA.HHZ. 2021-09-25T06:45:52.00 3.0 undecidable manual S -2.85 0
IV.FIU.EHZ. 2021-09-25T06:45:49.33 3.0 positive manual Pn -3.51 0
IV.NARO.HHZ. 2021-09-25T06:45:47.32 3.0 undecidable manual S -2.51 0
IV.TST02.HHZ. 2021-09-25T06:45:39.75 3.0 undecidable manual Pg 3.42 0
IV.CERA.HHZ. 2021-09-25T06:45:34.96 3.0 positive manual Pn -3.9 0
IV.CSP1.EHZ. 2021-09-25T06:45:33.82 0.3 undecidable manual S 360 0.4146 50 0.53 63
IV.FDMO.HHZ. 2021-09-25T06:45:32.02 0.3 undecidable manual S 346 0.3696 50 0.05 71
IV.MF5.EHZ. 2021-09-25T06:45:32.66 0.3 undecidable manual S 30 0.3606 50 0.97 53
IV.ARRO.EHZ. 2021-09-25T06:45:30.77 0.3 undecidable manual S 253 0.3408 50 -0.34 67
IV.TERO.HHZ. 2021-09-25T06:45:29.24 0.3 undecidable manual S 101 0.295 50 -0.51 65
IV.MC2.EHZ. 2021-09-25T06:45:28.08 0.3 undecidable manual S 356 0.2347 50 0.12 72
IV.CSP1.EHZ. 2021-09-25T06:45:27.10 0.1 undecidable manual P 360 0.4146 50 0.09 93
IV.GAVE.EHZ. 2021-09-25T06:45:27.91 0.3 undecidable manual S 274 0.232 50 0.02 74
IV.MMO1.EHZ. 2021-09-25T06:45:27.86 0.3 undecidable manual S 21 0.2374 50 -0.2 71
IV.FDMO.HHZ. 2021-09-25T06:45:26.26 0.1 undecidable manual P 346 0.3696 50 0.01 96
IV.MF5.EHZ. 2021-09-25T06:45:26.56 0.1 undecidable manual P 30 0.3606 50 0.47 87
IV.LNSS.HHZ. 2021-09-25T06:45:25.20 0.3 undecidable manual S 239 0.1448 123 0.09 74
IV.ARRO.EHZ. 2021-09-25T06:45:25.71 0.1 undecidable manual P 253 0.3408 50 -0.04 96
IV.MTRA.EHZ. 2021-09-25T06:45:25.12 0.3 undecidable manual S 60 0.1583 121 -0.43 69
IV.NRCA.HHZ. 2021-09-25T06:45:25.51 0.3 undecidable manual S 336 0.1709 119 -0.45 68
IV.RM33.EHZ. 2021-09-25T06:45:25.88 0.3 undecidable manual S 179 0.1682 119 0 75
IV.TERO.HHZ. 2021-09-25T06:45:24.70 0.3 undecidable manual P 101 0.295 50 -0.27 69
IV.MMO1.EHZ. 2021-09-25T06:45:23.47 0.3 undecidable manual P 21 0.2374 50 -0.52 66
IV.MC2.EHZ. 2021-09-25T06:45:23.57 0.1 undecidable manual P 356 0.2347 50 -0.36 91
IV.GAVE.EHZ. 2021-09-25T06:45:23.84 0.1 undecidable manual P 274 0.232 50 -0.06 98
IV.SMA1.EHZ. 2021-09-25T06:45:23.97 0.3 undecidable manual S 117 0.1034 132 0.13 74
IV.NRCA.HHZ. 2021-09-25T06:45:22.76 0.1 undecidable manual P 336 0.1709 119 -0.02 99
IV.RM33.EHZ. 2021-09-25T06:45:22.87 0.1 undecidable manual P 179 0.1682 119 0.14 97
IV.LNSS.HHZ. 2021-09-25T06:45:22.50 0.1 undecidable manual P 239 0.1448 123 0.21 96
IV.MTRA.EHZ. 2021-09-25T06:45:22.54 0.1 undecidable manual P 60 0.1583 121 0 100
IV.SMA1.EHZ. 2021-09-25T06:45:21.86 0.1 undecidable manual P 117 0.1034 132 0.3 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.0005995 0.14 AML other m 2021-09-25T06:45:24.59
IV.SMA1.EHN. ML:1.5 0.0003785 0.44 AML other m 2021-09-25T06:45:24.65
IV.LNSS.HHN. ML:1.4 0.000209 0.34 AML other m 2021-09-25T06:45:25.55
IV.MTRA.EHN. ML:1.4 0.00023 0.66 AML other m 2021-09-25T06:45:25.33
IV.NRCA.HHN. ML:1.6 0.000326 1.32 AML other m 2021-09-25T06:45:25.75
IV.NRCA.HNN. ML:1.6 0.000338 1.34 AML other m 2021-09-25T06:45:25.76
IV.MTRA.EHE. ML:1.5 0.000286 1.7 AML other m 2021-09-25T06:45:25.04
IV.NRCA.HNE. ML:1.8 0.000481 0.12 AML other m 2021-09-25T06:45:25.91
IV.NRCA.HHE. ML:1.8 0.0005455 0.14 AML other m 2021-09-25T06:45:25.84
IV.RM33.EHE. ML:1.1 9.465E-5 0.9 AML other m 2021-09-25T06:45:26.48
IV.RM33.EHN. ML:1.1 0.000106 0.2 AML other m 2021-09-25T06:45:26.11
IV.LNSS.HHE. ML:1.2 0.000142 0.22 AML other m 2021-09-25T06:45:26.61
IV.GAVE.EHN. ML:1.4 0.0001355 0.66 AML other m 2021-09-25T06:45:28.47
IV.GAVE.EHE. ML:1.4 0.0001385 0.84 AML other m 2021-09-25T06:45:28.47
IV.FDMO.HHE. ML:0.8 1.975E-5 1.78 AML other m 2021-09-25T06:45:32.98
IV.FDMO.HHN. ML:0.6 1.655E-5 0.96 AML other m 2021-09-25T06:45:34.58
IV.TST02.HHE. ML:3.3 0.00158 1.28 AML other m 2021-09-25T06:45:44.89
IV.TST02.HHN. ML:3.2 0.00129 0.42 AML other m 2021-09-25T06:45:50.04
IX.RSF3.HHN.02 ML:2.8 0.000104 0.04 AML other m 2021-09-25T06:45:52.56
IX.RSF3.HHE.02 ML:2.8 0.0001057 0.94 AML other m 2021-09-25T06:45:55.54
IV.GRIS.EHN. ML:2.6 2.32E-5 1.36 AML other m 2021-09-25T06:46:15.07
IV.GRIS.EHE. ML:2.7 2.785E-5 0.44 AML other m 2021-09-25T06:46:23.78
IV.NDIM.HNN. ML:4.1 0.0014775 1.2 AML other m 2021-09-25T06:46:35.20
IV.NDIM.HHE. ML:3.8 0.0008455 1.76 AML other m 2021-09-25T06:46:39.96
IV.NDIM.HNE. ML:3.9 0.0009625 1.76 AML other m 2021-09-25T06:46:39.08
IV.NDIM.HHN. ML:3.6 0.0004515 0.78 AML other m 2021-09-25T06:46:39.97
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