Earthquake with magnitude of ML 2.3 on date 09-12-2020 and time 19:16:15 (Italy) in region 7 km NW Accumoli (RI)

A magnitude ML 2.3 earthquake occured in region: 7 km NW Accumoli (RI), on

  • 09-12-2020 18:16:15 (UTC)
  • 09-12-2020 19:16:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.744, 13.187 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.

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
Norcia PG 9 4957 5624
Arquata del Tronto AP 10 1178 6802
Cittareale RI 14 482 7284
Cascia PG 14 3217 10501
Amatrice RI 15 2657 13158
Montegallo AP 16 523 13681
Castelsantangelo sul Nera MC 17 281 13962
Acquasanta Terme AP 19 2916 16878
Preci PG 19 724 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
47 Km NW of L'Aquila (69753 inhabitants)
49 Km E of Terni (111501 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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
Bulletin
Rev1000
ML 2.3 2020-12-09
18:16:15
42.7437 13.1868 9 2021-02-26
14:56:19
Bollettino Sismico Italiano INGV 87263391
Reviewed
Rev100
ML 2.4 2020-12-09
18:16:15
42.7488 13.1918 10 2020-12-09
18:22:46
Sala Sismica INGV-Roma 85321971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-09 18:16:15 ± 0.06
Latitude 42.7437 ± 0.0036
Longitude 13.1868 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87263391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 241
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.10432
Epicentral distance of station farthest from the epicenter (degree) 0.93799
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 60
Type of magnitude ML
Reference to an origin 87263391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-18 02:06:03

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 61
Type of magnitude ML
Reference to an origin 85321971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-09 18:22:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-12-09T18:16:36.39 0.6 undecidable manual S 354 0.5882 50 0.7 38
IV.SNTG.HHZ. 2020-12-09T18:16:34.59 0.6 undecidable manual S 341 0.5414 50 0.29 44
IV.ASSB.HHZ. 2020-12-09T18:16:33.09 0.6 undecidable manual S 308 0.4883 50 0.37 43
IV.MPAG.EHZ. 2020-12-09T18:16:33.64 0.3 undecidable manual P 341 0.938 50 0.54 56
IV.OFFI.HHZ. 2020-12-09T18:16:32.80 0.6 undecidable manual S 62 0.4128 50 2.33 13
IV.SAP2.EHZ. 2020-12-09T18:16:30.58 0.6 undecidable manual S 24 0.3858 50 0.91 36
IV.ARVD.HHZ. 2020-12-09T18:16:30.36 0.3 undecidable manual P 347 0.7752 50 0.06 65
IV.MURB.HHZ. 2020-12-09T18:16:29.67 0.6 undecidable manual P 317 0.7096 50 0.48 40
IV.CSP1.EHZ. 2020-12-09T18:16:28.46 0.6 undecidable manual S 2 0.348 50 -0.1 47
IV.GUMA.HHZ. 2020-12-09T18:16:28.78 0.6 undecidable manual S 19 0.3363 50 0.55 43
IV.T0110.HHZ. 2020-12-09T18:16:28.41 0.3 undecidable manual P 140 0.6727 50 -0.15 65
IV.MF5.EHZ. 2020-12-09T18:16:28.16 0.6 undecidable manual S 39 0.3157 50 0.56 43
IV.ARRO.EHZ. 2020-12-09T18:16:28.78 0.6 undecidable manual S 242 0.3507 50 0.15 47
IV.CESI.HHZ. 2020-12-09T18:16:27.87 0.6 undecidable manual S 322 0.3327 50 -0.25 46
IV.TERO.HHZ. 2020-12-09T18:16:27.24 0.6 undecidable manual S 111 0.3292 50 -0.76 39
IV.SNTG.HHZ. 2020-12-09T18:16:26.13 0.3 undecidable manual P 341 0.5414 50 -0.18 67
IV.FDMO.HHZ. 2020-12-09T18:16:26.90 0.6 undecidable manual S 346 0.3013 50 -0.29 46
IV.EL6.EHZ. 2020-12-09T18:16:26.89 0.1 undecidable manual P 354 0.5882 50 -0.23 87
IV.CAMP.HHZ. 2020-12-09T18:16:25.01 0.6 undecidable manual S 142 0.2644 50 -1.07 35
IV.MNTT.EHZ. 2020-12-09T18:16:25.02 0.3 undecidable manual P 43 0.4371 50 0.5 64
IV.ASSB.HHZ. 2020-12-09T18:16:25.22 0.3 undecidable manual P 308 0.4883 50 -0.19 67
IV.MOMA.HHZ. 2020-12-09T18:16:24.81 0.3 undecidable manual P 278 0.4569 50 -0.04 70
IV.OFFI.HHZ. 2020-12-09T18:16:24.72 0.3 undecidable manual P 62 0.4128 50 0.61 61
IV.FEMA.HNE. 2020-12-09T18:16:24.92 0.6 undecidable manual S 335 0.2401 109 -0.29 46
IV.GAVE.EHZ. 2020-12-09T18:16:24.80 0.6 undecidable manual S 257 0.2212 111 0.28 47
IV.CESX.HHZ. 2020-12-09T18:16:24.74 0.3 undecidable manual P 253 0.4614 50 -0.19 68
IV.SAP2.EHZ. 2020-12-09T18:16:23.84 0.1 undecidable manual P 24 0.3858 50 0.2 92
IV.LNSS.HHZ. 2020-12-09T18:16:23.26 0.3 undecidable manual S 217 0.1772 115 0.29 70
IV.MC2.EHZ. 2020-12-09T18:16:22.77 0.3 undecidable manual S 1 0.1673 117 0.14 73
IV.MF5.EHZ. 2020-12-09T18:16:22.50 0.1 positive manual P 39 0.3157 50 0.06 96
IV.ARRO.EHZ. 2020-12-09T18:16:22.89 0.1 undecidable manual P 242 0.3507 50 -0.15 93
IV.MMO1.EHZ. 2020-12-09T18:16:22.95 0.3 undecidable manual S 33 0.1862 114 -0.33 70
IV.CESI.HHZ. 2020-12-09T18:16:22.48 0.1 undecidable manual P 322 0.3327 50 -0.27 91
IV.CSP1.EHZ. 2020-12-09T18:16:22.65 0.1 positive manual P 2 0.348 50 -0.35 89
IV.SMA1.EHZ. 2020-12-09T18:16:22.73 0.6 undecidable manual S 136 0.1574 118 0.46 45
IV.TERO.HHZ. 2020-12-09T18:16:22.22 0.1 undecidable manual P 111 0.3292 50 -0.46 88
IV.GUMA.HHZ. 2020-12-09T18:16:22.78 0.1 undecidable manual P 19 0.3363 50 -0.03 96
IV.T1299.EHN. 2020-12-09T18:16:21.81 0.3 undecidable manual S 147 0.1295 123 0.44 69
IV.CAMP.HHZ. 2020-12-09T18:16:21.24 0.1 positive manual P 142 0.2644 50 -0.33 91
IV.MTRA.EHZ. 2020-12-09T18:16:21.80 0.3 undecidable manual S 85 0.1547 119 -0.38 69
IV.FDMO.HHZ. 2020-12-09T18:16:21.82 0.1 positive manual P 346 0.3013 50 -0.39 90
IV.NRCA.HNZ. 2020-12-09T18:16:20.26 0.3 undecidable manual S 329 0.1043 129 -0.31 71
IV.FEMA.HNE. 2020-12-09T18:16:20.75 0.3 undecidable manual P 335 0.2401 109 -0.32 69
IV.GAVE.EHZ. 2020-12-09T18:16:20.67 0.1 undecidable manual P 257 0.2212 111 0.01 98
IV.SMA1.EHZ. 2020-12-09T18:16:19.42 0.1 undecidable manual P 136 0.1574 118 0.05 99
IV.MC2.EHZ. 2020-12-09T18:16:19.60 0.1 positive manual P 1 0.1673 117 0.02 99
IV.T1299.EHN. 2020-12-09T18:16:19.18 0.1 undecidable manual P 147 0.1295 123 0.33 94
IV.MMO1.EHZ. 2020-12-09T18:16:19.76 0.1 undecidable manual P 33 0.1862 114 -0.19 95
IV.MTRA.EHZ. 2020-12-09T18:16:19.26 0.1 positive manual P 85 0.1547 119 -0.06 99
IV.LNSS.HHZ. 2020-12-09T18:16:19.96 0.1 positive manual P 217 0.1772 115 0.19 96
IV.NRCA.HNZ. 2020-12-09T18:16:18.43 0.1 positive manual P 329 0.1043 129 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNN. ML:2.6 0.004645 0.14 AML other m 2020-12-09T18:16:20.44
IV.NRCA.HNE. ML:2.7 0.00569 0.16 AML other m 2020-12-09T18:16:20.53
IV.NRCA.HHE. ML:2.7 0.00645 0.14 AML other m 2020-12-09T18:16:20.52
IV.MTRA.HNE. ML:2.8 0.00573 0.72 AML other m 2020-12-09T18:16:22.09
IV.MTRA.EHE. ML:2.8 0.005745 0.72 AML other m 2020-12-09T18:16:22.09
IV.MTRA.EHN. ML:2.7 0.00453 0.42 AML other m 2020-12-09T18:16:22.52
IV.MTRA.HNN. ML:2.7 0.00451 0.26 AML other m 2020-12-09T18:16:22.85
IV.LNSS.HHE. ML:2.6 0.00299 0.24 AML other m 2020-12-09T18:16:23.58
IV.LNSS.HNE. ML:2.6 0.00291 0.24 AML other m 2020-12-09T18:16:23.58
IV.LNSS.HHN. ML:2.6 0.00317 1.16 AML other m 2020-12-09T18:16:23.97
IV.LNSS.HNN. ML:2.6 0.002915 1.16 AML other m 2020-12-09T18:16:23.97
IV.SMA1.EHE. ML:2.4 0.002305 0.34 AML other m 2020-12-09T18:16:24.82
IV.GAVE.EHN. ML:2.4 0.001725 0.72 AML other m 2020-12-09T18:16:25.58
IV.GAVE.HNN. ML:2 0.000639 0.72 AML other m 2020-12-09T18:16:25.58
IV.GAVE.EHE. ML:2.4 0.001595 0.18 AML other m 2020-12-09T18:16:25.57
IV.GAVE.HNE. ML:2.4 0.001485 0.52 AML other m 2020-12-09T18:16:25.48
IV.SMA1.EHN. ML:2.2 0.001375 1.58 AML other m 2020-12-09T18:16:26.00
IV.FDMO.HHE. ML:2.1 0.000545 0.76 AML other m 2020-12-09T18:16:27.68
IV.FDMO.HHN. ML:2.1 0.0005695 0.48 AML other m 2020-12-09T18:16:27.71
IV.CESI.HHE. ML:2.2 0.0005765 0.2 AML other m 2020-12-09T18:16:28.18
IV.CESI.HHN. ML:2.4 0.00104 0.3 AML other m 2020-12-09T18:16:28.34
IV.CAMP.HHN. ML:1.6 0.000211 0.4 AML other m 2020-12-09T18:16:28.81
IV.CSP1.EHE. ML:2.9 0.002655 0.4 AML other m 2020-12-09T18:16:29.30
IV.GUMA.HHE. ML:3.1 0.00541 0.26 AML other m 2020-12-09T18:16:29.24
IV.GUMA.HNE. ML:3.1 0.004595 0.24 AML other m 2020-12-09T18:16:29.24
IV.GUMA.HNN. ML:2.8 0.002385 0.44 AML other m 2020-12-09T18:16:29.09
IV.GUMA.HHN. ML:3 0.00357 1.04 AML other m 2020-12-09T18:16:29.76
IV.CSP1.EHN. ML:3 0.003205 0.94 AML other m 2020-12-09T18:16:29.94
IV.ARRO.EHN. ML:1.9 0.000317 1.14 AML other m 2020-12-09T18:16:30.08
IV.SAP2.EHN. ML:3.5 0.01001 1.36 AML other m 2020-12-09T18:16:30.14
IV.CAMP.HHE. ML:1.8 0.0002925 1.28 AML other m 2020-12-09T18:16:30.34
IV.MF5.EHN. ML:2.2 0.000707 0.52 AML other m 2020-12-09T18:16:31.20
IV.SAP2.EHE. ML:2.6 0.00136 0.48 AML other m 2020-12-09T18:16:31.04
IV.MF5.EHE. ML:2.2 0.0007465 0.34 AML other m 2020-12-09T18:16:31.81
IV.ARRO.EHE. ML:1.8 0.000253 0.18 AML other m 2020-12-09T18:16:32.03
IV.MOMA.HNN. ML:2.5 0.0008245 0.52 AML other m 2020-12-09T18:16:33.26
IV.MOMA.HNE. ML:2.2 0.0004465 1.78 AML other m 2020-12-09T18:16:33.97
IV.MOMA.HHE. ML:0 0.0004475 1.78 AML other m 2020-12-09T18:16:33.97
IV.MOMA.HHN. ML:2.2 0.0003715 0.74 AML other m 2020-12-09T18:16:34.04
IV.CESX.HHE. ML:2 0.0002455 0.66 AML other m 2020-12-09T18:16:34.12
IV.OFFI.HHE. ML:2.3 0.0005825 0.34 AML other m 2020-12-09T18:16:34.51
IV.CESX.HHN. ML:2 0.0002375 0.66 AML other m 2020-12-09T18:16:34.84
IV.MNTT.EHE. ML:2.5 0.0008975 0.32 AML other m 2020-12-09T18:16:35.04
IV.MNTT.EHN. ML:2.5 0.000954 0.54 AML other m 2020-12-09T18:16:35.04
IV.ASSB.HHE. ML:2.1 0.000289 0.3 AML other m 2020-12-09T18:16:35.34
IV.ASSB.HHN. ML:2 0.000224 0.36 AML other m 2020-12-09T18:16:35.53
IV.SNTG.HHN. ML:1.9 0.0001595 0.72 AML other m 2020-12-09T18:16:35.83
IV.SNTG.HHE. ML:1.9 0.000168 0.12 AML other m 2020-12-09T18:16:35.89
IV.OFFI.HHN. ML:2.4 0.000832 0.76 AML other m 2020-12-09T18:16:35.95
IV.EL6.EHN. ML:2.2 0.0003085 0.74 AML other m 2020-12-09T18:16:39.12
IV.EL6.EHE. ML:2.3 0.0003945 0.44 AML other m 2020-12-09T18:16:40.59
IV.T0110.HHE. ML:2 0.0001575 1.58 AML other m 2020-12-09T18:16:41.88
IV.MURB.HHN. ML:2.3 0.0003015 0.28 AML other m 2020-12-09T18:16:43.62
IV.ARVD.HHE. ML:1.9 9.453555E-5 1.8208 AML other m 2020-12-09T18:16:44.04
IV.T0110.HHN. ML:2.1 0.0002015 0.44 AML other m 2020-12-09T18:16:44.44
IV.MPAG.HNE. ML:2.3 0.0001901832 0.2688 AML other m 2020-12-09T18:16:48.97
IV.MPAG.EHE. ML:2.2 0.00012919612 0.2688 AML other m 2020-12-09T18:16:48.71
IV.MPAG.EHN. ML:2 9.598847E-5 0.2176 AML other m 2020-12-09T18:16:48.95
IV.MURB.HHE. ML:2.4 0.000357 1.46 AML other m 2020-12-09T18:16:48.95
IV.ARVD.HHN. ML:1.8 7.71E-5 0.64 AML other m 2020-12-09T18:16:54.57
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download