Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 31-12-2019 and time 22:33:46 (Italy) in region 1 km W Accumoli (RI)

A magnitude ML 1.2 earthquake occured in region: 1 km W Accumoli (RI), on

  • 31-12-2019 21:33:46 (UTC)
  • 31-12-2019 22:33:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6940, 13.2330 at 13 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 1 667 667
Amatrice RI 8 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 10 482 4984
Norcia PG 16 4957 9941
Acquasanta Terme AP 17 2916 12857
Cascia PG 18 3217 16074
Montegallo AP 19 523 16597
Campotosto AQ 19 542 17139
Montereale AQ 19 2581 19720
Capitignano AQ 20 665 20385

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Teramo (54892 inhabitants)
40 Km NW of L'Aquila (69753 inhabitants)
50 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
84 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
97 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
Bulletin
Rev1000 		ML 1.2 2019-12-31
21:33:46		 42.694 13.2333 13 2020-02-28
16:42:20		 Bollettino Sismico Italiano INGV 75792521
Reviewed
Rev100 		ML 1.2 2019-12-31
21:33:46		 42.6978 13.2332 11 2019-12-31
21:39:19		 Sala Sismica INGV-Roma 75148341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-31 21:33:46 ± 0.06
Latitude 42.6940 ± 0.0036
Longitude 13.2333 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75792521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 447
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 0.45326
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 30
Type of magnitude ML
Reference to an origin 75792521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-24 10:24:05

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 75148341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-31 21:39:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2019-12-31T21:33:59.18 0.6 undecidable manual S 343 39.8268 94 0.04 49
IV.MF5.EHZ. 2019-12-31T21:33:59.42 0.6 undecidable manual S 29 37.4292 94 0.92 38
IV.GIGS.HHZ. 2019-12-31T21:33:58.50 0.6 undecidable manual S 134 38.5281 94 -0.3 46
IV.MNTT.EHZ. 2019-12-31T21:33:56.11 0.3 undecidable manual P 36 50.3163 93 0.89 56
IV.GAVE.EHZ. 2019-12-31T21:33:55.81 0.6 undecidable manual S 270 27.6501 97 -0.09 49
IV.RM33.EHZ. 2019-12-31T21:33:54.20 0.6 undecidable manual S 184 20.5683 103 0.15 48
IV.MMO1.EHZ. 2019-12-31T21:33:54.79 0.3 undecidable manual S 18 24.0537 100 -0.16 72
IV.CAMP.HHZ. 2019-12-31T21:33:54.40 0.3 undecidable manual S 141 22.6551 101 -0.2 73
IV.MC2.EHZ. 2019-12-31T21:33:54.99 0.6 undecidable manual S 352 24.3534 99 -0.05 49
IV.CSP1.EHZ. 2019-12-31T21:33:54.34 0.3 undecidable manual P 357 44.2224 93 0.07 72
IV.ARRO.EHZ. 2019-12-31T21:33:53.63 0.3 undecidable manual P 252 40.2264 94 -0.04 72
IV.NRCA.HHZ. 2019-12-31T21:33:53.03 0.3 undecidable manual S 328 18.2706 107 -0.42 69
IV.GIGS.HHZ. 2019-12-31T21:33:53.32 0.3 undecidable manual P 134 38.5281 94 -0.08 72
IV.LNSS.HHZ. 2019-12-31T21:33:53.69 0.6 undecidable manual S 237 18.6702 106 0.12 49
IV.FDMO.HHZ. 2019-12-31T21:33:53.44 0.1 undecidable manual P 343 39.8268 94 -0.16 94
IV.MF5.EHZ. 2019-12-31T21:33:53.55 0.1 undecidable manual P 29 37.4292 94 0.31 92
IV.MTRA.HNZ. 2019-12-31T21:33:52.17 0.3 undecidable manual S 62 14.9739 114 -0.47 69
IV.SMA1.EHZ. 2019-12-31T21:33:51.54 0.6 undecidable manual S 130 10.878 128 -0.16 50
IV.GAVE.EHZ. 2019-12-31T21:33:51.63 0.1 undecidable manual P 270 27.6501 97 -0.1 97
IV.MMO1.EHZ. 2019-12-31T21:33:51.05 0.1 undecidable manual P 18 24.0537 100 -0.14 97
IV.T1299.HNZ. 2019-12-31T21:33:51.06 0.6 undecidable manual S 149 7.7811 141 -0.03 51
IV.MC2.EHZ. 2019-12-31T21:33:51.23 0.3 undecidable manual P 352 24.3534 99 -0.01 74
IV.NRCA.HHZ. 2019-12-31T21:33:50.22 0.1 undecidable manual P 328 18.2706 107 -0.1 99
IV.CAMP.HHZ. 2019-12-31T21:33:50.95 0.1 undecidable manual P 141 22.6551 101 -0.03 100
IV.LNSS.HHZ. 2019-12-31T21:33:50.45 0.1 positive manual P 237 18.6702 106 0.07 99
IV.RM33.EHZ. 2019-12-31T21:33:50.79 0.1 undecidable manual P 184 20.5683 103 0.12 98
IV.T1299.HNZ. 2019-12-31T21:33:49.13 0.1 undecidable manual P 149 7.7811 141 0.17 98
IV.SMA1.EHZ. 2019-12-31T21:33:49.39 0.1 positive manual P 130 10.878 128 0.08 100
IV.MTRA.HNZ. 2019-12-31T21:33:49.74 0.1 undecidable manual P 62 14.9739 114 -0.11 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.2 0.0001801644 0.1024 AML other m 2019-12-31T21:33:51.73
IV.SMA1.EHN. ML:1.1 0.00014126444999999999 0.3456 AML other m 2019-12-31T21:33:52.17
IV.MTRA.HNN. ML:1.2 0.000144576 0.1152 AML other m 2019-12-31T21:33:52.31
IV.MTRA.EHN. ML:1.2 0.00012668574999999998 0.1024 AML other m 2019-12-31T21:33:52.31
IV.MTRA.HNE. ML:1.3 0.00015492255 0.1792 AML other m 2019-12-31T21:33:52.37
IV.MTRA.EHE. ML:1.2 0.00012482965 0.064 AML other m 2019-12-31T21:33:52.45
IV.NRCA.HHN. ML:2.0 0.0008386841000000001 0.1024 AML other m 2019-12-31T21:33:53.15
IV.NRCA.HNN. ML:2.0 0.00073960915 0.1024 AML other m 2019-12-31T21:33:53.16
IV.NRCA.HHE. ML:2.1 0.0009435091999999999 0.0896 AML other m 2019-12-31T21:33:53.16
IV.NRCA.HNE. ML:2.1 0.0009556246 0.1408 AML other m 2019-12-31T21:33:53.16
IV.LNSS.HNE. ML:1.6 0.00029926905000000003 0.2944 AML other m 2019-12-31T21:33:53.72
IV.LNSS.HHE. ML:1.6 0.00030045394999999995 0.2816 AML other m 2019-12-31T21:33:53.86
IV.LNSS.HNN. ML:1.6 0.0002581913 1.8464 AML other m 2019-12-31T21:33:54.00
IV.LNSS.HHN. ML:1.6 0.00027574224999999997 1.8464 AML other m 2019-12-31T21:33:54.93
IV.RM33.HNN. ML:1.3 0.00013737610000000001 1.4112 AML other m 2019-12-31T21:33:54.21
IV.RM33.EHN. ML:1.2 0.00009773217500000001 0.256 AML other m 2019-12-31T21:33:54.34
IV.RM33.HNE. ML:1.1 0.00008835781000000001 0.6016 AML other m 2019-12-31T21:33:54.28
IV.RM33.EHE. ML:1.0 0.000062630115 0.2048 AML other m 2019-12-31T21:33:55.60
IV.GAVE.EHN. ML:1.5 0.000149029655 0.1536 AML other m 2019-12-31T21:33:56.27
IV.GAVE.EHE. ML:1.5 0.000158398965 0.192 AML other m 2019-12-31T21:33:56.29
IV.GAVE.HNE. ML:1.6 0.00019646158000000003 0.2048 AML other m 2019-12-31T21:33:56.29
IV.GIGS.HHN. ML:0.4 0.00000966543 1.8848 AML other m 2019-12-31T21:33:58.05
IV.GIGS.HHE. ML:0.4 0.000011211335000000001 1.8848 AML other m 2019-12-31T21:33:59.05
IV.MF5.EHN. ML:1.0 0.000040960745 0.2432 AML other m 2019-12-31T21:33:59.52
IV.ARRO.EHE. ML:0.8 0.000021524040000000002 1.8336 AML other m 2019-12-31T21:34:01.99
IV.ARRO.EHN. ML:1.0 0.000029467005 0.2816 AML other m 2019-12-31T21:34:01.27
IV.FDMO.HHN. ML:0.6 0.000016000715 0.1664 AML other m 2019-12-31T21:34:01.26
IV.FDMO.HHE. ML:0.6 0.00001376637 0.1664 AML other m 2019-12-31T21:34:02.34
IV.CSP1.EHE. ML:0.8 0.000018595995 0.2048 AML other m 2019-12-31T21:34:02.87
IV.CSP1.EHN. ML:0.8 0.000022436991500000002 0.2048 AML other m 2019-12-31T21:34:03.16
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