Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 25-12-2019 and time 23:00:13 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 25-12-2019 22:00:13 (UTC)
  • 25-12-2019 23:00:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7530, 13.2040 at 9 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
Accumoli RI 7 667 667
Arquata del Tronto AP 8 1178 1845
Norcia PG 10 4957 6802
Montegallo AP 15 523 7325
Amatrice RI 15 2657 9982
Cittareale RI 15 482 10464
Cascia PG 16 3217 13681
Castelsantangelo sul Nera MC 16 281 13962
Acquasanta Terme AP 17 2916 16878
Montemonaco AP 19 604 17482
Preci PG 19 724 18206

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Teramo (54892 inhabitants)
47 Km E of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
50 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
89 Km W of Pescara (121014 inhabitants)
91 Km NW of Chieti (51815 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km NE of Tivoli (56533 inhabitants)
97 Km E of Viterbo (67173 inhabitants)
100 Km S of Ancona (100861 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 0.9 2019-12-25
22:00:13		 42.7533 13.2037 9 2020-02-28
16:42:19		 Bollettino Sismico Italiano INGV 75544301
Reviewed
Rev100 		ML 1.0 2019-12-25
22:00:13		 42.7532 13.2055 9 2019-12-25
22:20:58		 Sala Sismica INGV-Roma 74978051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-25 22:00:13 ± 0.08
Latitude 42.7533 ± 0.0027
Longitude 13.2037 ± 0.0061
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75544301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 388
Semi-minor axis of confidence ellipse (meter) 325
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.46765
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 74978051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-25 22:20:58

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 75544301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-14 19:35:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HNE. 2019-12-25T22:00:30.17 0.3 undecidable manual S 276 51.9036 50 0.11 68
IV.CSP1.EHZ. 2019-12-25T22:00:26.15 0.6 undecidable manual S 0 37.5291 50 -0.08 47
IV.MOMA.HNE. 2019-12-25T22:00:23.36 0.3 undecidable manual P 276 51.9036 50 0.41 64
IV.RM33.EHZ. 2019-12-25T22:00:22.84 0.1 undecidable manual S 178 27.1506 108 -0.27 92
IV.LNSS.HHZ. 2019-12-25T22:00:21.27 0.1 undecidable manual S 219 21.3675 112 0.04 98
IV.CSP1.EHZ. 2019-12-25T22:00:20.44 0.1 undecidable manual P 0 37.5291 50 -0.3 90
IV.MC2.EHZ. 2019-12-25T22:00:20.57 0.1 undecidable manual S 356 17.5713 116 0.54 88
IV.MMO1.EHZ. 2019-12-25T22:00:20.37 0.1 undecidable manual S 32 19.0698 115 -0.12 96
IV.SMA1.EHZ. 2019-12-25T22:00:20.00 0.3 undecidable manual S 142 17.3715 117 0.04 74
IV.MTRA.HNZ. 2019-12-25T22:00:19.37 0.3 undecidable manual S 89 15.6732 119 -0.09 73
IV.T1299.EHZ. 2019-12-25T22:00:19.87 0.6 undecidable manual S 154 14.6742 121 0.72 41
IV.RM33.EHZ. 2019-12-25T22:00:18.73 0.1 undecidable manual P 178 27.1506 108 -0.21 93
IV.MMO1.EHZ. 2019-12-25T22:00:17.29 0.1 undecidable manual P 32 19.0698 115 -0.13 96
IV.SMA1.EHZ. 2019-12-25T22:00:17.66 0.3 undecidable manual P 142 17.3715 117 0.54 66
IV.LNSS.HHZ. 2019-12-25T22:00:17.79 0.1 undecidable manual P 219 21.3675 112 -0.06 97
IV.MC2.EHZ. 2019-12-25T22:00:17.17 0.1 undecidable manual P 356 17.5713 116 0.02 99
IV.NRCA.HHZ. 2019-12-25T22:00:17.91 0.1 undecidable manual S 321 11.4774 127 -0.32 94
IV.T1299.EHZ. 2019-12-25T22:00:16.35 0.3 undecidable manual P 154 14.6742 121 -0.3 70
IV.NRCA.HHZ. 2019-12-25T22:00:16.11 0.1 undecidable manual P 321 11.4774 127 -0.01 100
IV.MTRA.HNZ. 2019-12-25T22:00:16.88 0.3 undecidable manual P 89 15.6732 119 0.06 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.1 0.00015533285 0.1024 AML other m 2019-12-25T22:00:18.06
IV.NRCA.HNN. ML:1.1 0.00015627719499999997 0.0896 AML other m 2019-12-25T22:00:18.07
IV.NRCA.HNE. ML:1.2 0.00022196179999999999 0.0768 AML other m 2019-12-25T22:00:18.08
IV.NRCA.HHE. ML:1.3 0.0002371556 0.0512 AML other m 2019-12-25T22:00:18.09
IV.LNSS.HHE. ML:0.8 0.000040386815 0.1664 AML other m 2019-12-25T22:00:21.54
IV.LNSS.HHN. ML:0.8 0.00003986483000000001 0.1792 AML other m 2019-12-25T22:00:21.57
IV.RM33.EHN. ML:0.3 0.0000114442215 0.576 AML other m 2019-12-25T22:00:23.30
IV.RM33.EHE. ML:0.3 0.000010003127500000001 0.1408 AML other m 2019-12-25T22:00:23.67
IV.CSP1.EHN. ML:0.4 0.000012499449 1.744 AML other m 2019-12-25T22:00:27.98
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