Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 25-11-2020 and time 23:05:29 (UTC) in region 1 km SE Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 1 km SE Accumoli (RI), on

  • 25-11-2020 23:05:29 (UTC)
  • 26-11-2020 00:05:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6910, 13.2570 at 8 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
Accumoli RI 1 667 667
Amatrice RI 7 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 11 482 4984
Acquasanta Terme AP 15 2916 7900
Campotosto AQ 18 542 8442
Norcia PG 18 4957 13399
Montegallo AP 18 523 13922
Montereale AQ 19 2581 16503
Capitignano AQ 19 665 17168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
39 Km NW of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
54 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
84 Km W of Chieti (51815 inhabitants)
85 Km SE of Perugia (166134 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
99 Km E of Viterbo (67173 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 0.9 2020-11-25
23:05:29		 42.691 13.2567 9 2020-11-25
23:09:06		 Sala Sismica INGV-Roma 85019551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 23:05:29 ± 0.07
Latitude 42.6910 ± 0.0036
Longitude 13.2567 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85019551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 359
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 156
Circular confidence region, given by single value of horizontal uncertainty (meter) 370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40200
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85019551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 23:09:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-11-25T23:05:44.96 0.6 undecidable manual S 355 44.622 50 0.06 47
IV.MF5.EHZ. 2020-11-25T23:05:43.36 0.6 undecidable manual S 27 36.8298 50 0.55 43
IV.FDMO.HHZ. 2020-11-25T23:05:43.46 0.6 undecidable manual S 340 40.7259 50 -0.39 44
IV.TERO.HHZ. 2020-11-25T23:05:39.37 3.0 undecidable manual S 0
IV.CSP1.EHZ. 2020-11-25T23:05:38.24 1.0 undecidable manual P 355 44.622 50 -0.34 22
IV.MMO1.EHZ. 2020-11-25T23:05:38.68 0.6 undecidable manual S 14 23.8539 110 -0.04 49
IV.FDMO.HHZ. 2020-11-25T23:05:37.59 1.0 undecidable manual P 340 40.7259 50 -0.38 22
IV.NRCA.HHZ. 2020-11-25T23:05:37.46 0.6 undecidable manual S 324 19.5693 113 0.1 49
IV.LNSS.HHZ. 2020-11-25T23:05:37.62 0.6 undecidable manual S 241 20.1687 113 0.08 49
IV.MF5.EHZ. 2020-11-25T23:05:37.36 0.6 undecidable manual P 27 36.8298 50 -0.01 48
IV.MTRA.EHZ. 2020-11-25T23:05:35.37 0.6 undecidable manual S 57 13.5753 122 -0.12 49
IV.TERO.HHZ. 2020-11-25T23:05:35.39 3.0 undecidable manual P -0.16 0
IV.LNSS.HHZ. 2020-11-25T23:05:34.33 0.1 positive manual P 241 20.1687 113 0 100
IV.MMO1.EHZ. 2020-11-25T23:05:34.92 0.6 positive manual P 14 23.8539 110 -0.09 49
IV.NRCA.HHZ. 2020-11-25T23:05:34.32 0.1 positive manual P 324 19.5693 113 0.09 98
IV.SMA1.EHZ. 2020-11-25T23:05:34.12 0.6 undecidable manual S 136 9.2796 132 -0.19 49
IV.MTRA.EHZ. 2020-11-25T23:05:33.19 0.1 negative manual P 57 13.5753 122 0.04 100
IV.SMA1.EHZ. 2020-11-25T23:05:32.60 0.3 negative manual P 136 9.2796 132 0.14 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.0 0.000128 0.16 AML other m 2020-11-25T23:05:34.39
IV.SMA1.EHE. ML:0.9 0.0001175 0.36 AML other m 2020-11-25T23:05:34.63
IV.MTRA.EHN. ML:1.2 0.000155 0.36 AML other m 2020-11-25T23:05:35.62
IV.MTRA.EHE. ML:1.1 0.00013800000000000002 0.42 AML other m 2020-11-25T23:05:35.74
IV.NRCA.HHN. ML:1.0 0.00007175000000000001 0.08 AML other m 2020-11-25T23:05:37.57
IV.LNSS.HHN. ML:0.7 0.0000412 0.52 AML other m 2020-11-25T23:05:37.44
IV.NRCA.HHE. ML:1.0 0.0000872 0.16 AML other m 2020-11-25T23:05:37.70
IV.LNSS.HHE. ML:0.8 0.00004775 0.2 AML other m 2020-11-25T23:05:38.50
IV.TERO.HHN. ML:0.6 0.0000212 0.56 AML other m 2020-11-25T23:05:40.26
IV.TERO.HHE. ML:0.5 0.0000167 0.76 AML other m 2020-11-25T23:05:40.29
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