Earthquake 3 km W Mistretta (ME), Magnitude Mw 3.7, 26 August 2014 time 01:19:45 (Timezone UTC)

A magnitude Mw 3.7 earthquake occured in region: 3 km W Mistretta (ME), on

26-08-2014 01:19:45 (UTC)
26-08-2014 03:19:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9350, 14.3260 at 27 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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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Mistretta	ME	3	4791	4791
Reitano	ME	5	806	5597
Pettineo	ME	5	1350	6947
Castel di Lucio	ME	5	1294	8241
Motta d'Affermo	ME	6	739	8980
Santo Stefano di Camastra	ME	9	4694	13674
Tusa	ME	10	2925	16599
San Mauro Castelverde	PA	12	1701	18300
Caronia	ME	14	3364	21664
Capizzi	ME	16	3176	24840
Pollina	PA	17	2974	27814
Geraci Siculo	PA	17	1945	29759
Gangi	PA	19	6811	36570
Sperlinga	EN	19	805	37375

Municipalities with at least 50000 inhabitants

An earthquake occurred to

54 Km NE of Caltanissetta (63360 inhabitants)

73 Km E of Bagheria (55387 inhabitants)

82 Km W of Acireale (52622 inhabitants)

82 Km NW of Catania (314555 inhabitants)

87 Km E of Palermo (674435 inhabitants)

95 Km NE of Agrigento (59770 inhabitants)

97 Km N of Gela (75827 inhabitants)

Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.

Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.

Shakemap

These three maps show the results of the analysis using the software ShakeMap designed to provide the level of ground shaking experienced in a region using the data recorded by seismometers and strong motion instruments and seismological information regarding the attenuation of the wavefield with distance and the site characteristics. The Shakemaps are determined for research purposes to provide fast estimates of the level of ground shaking produced by the earthquake. The maps are calculated automatically and updated as more data become available. See http://shakemap.ingv.it for additional information. The black star indicates the epicenter. The triangles show the accelerometric and velocimetric stations used in the calculation, colored according to the recorded shaking.

Intensity Shakemap

This map shows the distribution of instrumental intensities. The intensity is derived through an empirical law that correlates the recorded values of actual ground shaking, e.g., acceleration and velocity, with the macroseismic intensity for Italian earthquakes, as reported in the Italian Macroseismic Database (DBMI15, https://doi.org/10.13127/cpti/cpti15.3).

Peak ground acceleration Shakemap

This map shows the distribution of peak ground acceleration expressed as percent of the acceleration of gravity (i.e., g = 9.81 m/s²).

Peak velocity Shakemap

This map shows the distribution of peak ground velocities expressed in cm/s.

Felt maps

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	ML 3.7	2014-08-26 01:19:45	37.9353	14.3265	27	2015-09-21 09:39:02	Bollettino Sismico Italiano INGV	17445781
Reviewed Rev100	ML 3.6 Mw 3.7	2014-08-26 01:19:46	37.9543	14.3337	9	2014-10-21 12:08:56	Sala Sismica INGV-Roma	7985381

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	2014-08-26 01:19:45 ± 0.1
Latitude	37.9353 ± 0.0072
Longitude	14.3265 ± 0.0057
Depth (km)	27 ± 1 (from location)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-INGV
Event type	earthquake
Origin ID	17445781

Uncertainty

Field	Value
Preferred uncertainty description	uncertainty ellipse
Semi-major axis of confidence ellipse (meter)	658
Semi-minor axis of confidence ellipse (meter)	464
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)	346
Circular confidence region, given by single value of horizontal uncertainty (meter)	660.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	51
Number of associated phases, regardless of their use for origin computation	46
Number of defining phases	46
RMS of the travel time residuals of the arrivals used for the origin computation (sec)	0.36
Epicentral distance of station closest to the epicenter (degree)	0.19515
Epicentral distance of station farthest from the epicenter (degree)	2.03606
Number of stations at which the event was observed	37
Number of stations from which data was used for origin computation	37

Magnitudes information

Mw:3.7

Field	Value
Value	3.7
Uncertainty
Num. used stations
Type of magnitude	Mw
Reference to an origin	7985381
Agency	INGV
Autore	TDMT-INGV Revised
Time of creation (UTC)	2014-08-26 15:29:14

ML:3.7

Field	Value
Value	3.7
Uncertainty	0.3
Num. used stations	1
Type of magnitude	ML
Reference to an origin	17445781
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2015-06-10 07:55:13

ML:3.6

Field	Value
Value	3.6
Uncertainty	0.4
Num. used stations	61
Type of magnitude	ML
Reference to an origin	7985381
Agency	INGV
Autore	Sala Sismica INGV-Roma
Time of creation (UTC)	2014-08-26 01:33:57

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Takeoff_angle	Residual	Weight
IV.CET2.HHZ.	2014-08-26T01:20:18.44	0.6	undecidable	manual	P	38	226.0071	54	-0.22	25
IV.SOI.EHZ.	2014-08-26T01:20:10.18	0.6	undecidable	manual	P	84	151.8369	54	0.76	32
IV.MPAZ.HHZ.	2014-08-26T01:20:09.84	0.3	undecidable	manual	P	89	147.0417	54	1.02	43
IV.SOLUN.HHZ.	2014-08-26T01:20:08.00	0.6	undecidable	manual	S	284	71.4729	105	0.59	41
IV.GMB.BHZ.	2014-08-26T01:20:07.23	0.6	undecidable	manual	P	78	133.7661	54	0.06	40
IV.MTGR.SHZ.	2014-08-26T01:20:07.90	0.6	undecidable	manual	P	269	137.2626	54	0.29	38
IV.USI.HHZ.	2014-08-26T01:20:05.53	0.3	undecidable	manual	P	311	131.5683	54	-1.37	38
IV.MTTG.HHZ.	2014-08-26T01:20:05.55	0.6	undecidable	manual	P	86	120.3906	98	0.09	42
IV.ISTR.HHZ.	2014-08-26T01:20:04.87	0.6	undecidable	manual	P	38	120.7902	98	-0.65	36
IV.ATN.BHZ.	2014-08-26T01:20:02.75	0.6	undecidable	manual	P	76	102.5196	100	0.01	44
IV.CLTA.HHZ.	2014-08-26T01:20:01.53	0.6	undecidable	manual	P	201	92.0412	101	0.38	42
IV.EPZF.HHZ.	2014-08-26T01:20:01.60	1.0	undecidable	manual	S	105	48.1185	113	0.13	24
IV.CORL.HHZ.	2014-08-26T01:20:01.62	0.3	undecidable	manual	P	267	89.6436	101	0.83	53
IV.MUCR.HHE.	2014-08-26T01:20:01.70	0.6	undecidable	manual	S	76	49.3173	112	-0.08	48
IV.MPNC.HHZ.	2014-08-26T01:20:00.74	0.6	undecidable	manual	P	75	92.6406	101	-0.51	40
IV.MILZ.HHZ.	2014-08-26T01:20:00.05	0.6	undecidable	manual	P	64	87.3459	102	-0.4	42
IV.MPG.SHZ.	2014-08-26T01:20:00.28	0.6	undecidable	manual	P	287	88.0452	102	-0.28	43
IV.EPOZ.HHZ.	2014-08-26T01:19:59.16	0.6	undecidable	manual	P	111	81.0522	103	-0.34	43
IV.AIO.HHZ.	2014-08-26T01:19:59.06	0.6	undecidable	manual	P	87	79.365	103	-0.19	44
IV.ILLI.HHZ.	2014-08-26T01:19:59.04	0.6	undecidable	manual	P	44	78.366	103	-0.06	46
IV.IFIL.HHZ.	2014-08-26T01:19:58.22	0.1	undecidable	manual	P	17	73.0713	104	-0.08	92
IV.IVPL.HHZ.	2014-08-26T01:19:58.58	0.1	positive	manual	P	49	75.1692	104	-0.03	92
IV.RESU.HHE.	2014-08-26T01:19:58.66	0.6	undecidable	manual	S	217	39.8268	118	-0.81	39
IV.MCSR.HHZ.	2014-08-26T01:19:58.92	0.6	undecidable	manual	P	79	80.2641	103	-0.47	42
IV.HLNI.HHZ.	2014-08-26T01:19:58.83	0.1	undecidable	manual	P	143	80.8635	103	-0.64	78
IV.ESML.HHZ.	2014-08-26T01:19:57.06	0.1	positive	manual	P	126	59.8956	108	0.7	80
IV.MNO.SHZ.	2014-08-26T01:19:57.50	0.3	undecidable	manual	S	91	32.2455	124	-0.24	71
IV.NOV.HHZ.	2014-08-26T01:19:57.82	0.1	undecidable	manual	P	82	71.5728	105	-0.26	88
IV.SOLUN.HHZ.	2014-08-26T01:19:57.94	0.1	undecidable	manual	P	284	71.4729	105	-0.14	91
IV.GIB.HHZ.	2014-08-26T01:19:57.20	0.3	undecidable	manual	S	283	26.9508	130	0.59	67
IV.IACL.HHZ.	2014-08-26T01:19:57.37	0.1	positive	manual	P	2	66.378	106	0.06	93
IV.ESLN.HHZ.	2014-08-26T01:19:57.68	0.3	undecidable	manual	P	115	62.7927	107	0.9	55
IV.GALF.HHZ.	2014-08-26T01:19:57.90	0.1	undecidable	manual	S	140	32.6451	124	0.08	100
IV.MSFR.HHZ.	2014-08-26T01:19:56.50	0.3	undecidable	manual	S	65	25.6521	131	0.16	75
IV.EMSG.HHZ.	2014-08-26T01:19:56.35	0.1	undecidable	manual	P	103	55.9995	109	0.56	85
IV.PETRA.HHZ.	2014-08-26T01:19:55.10	0.1	undecidable	manual	S	239	21.6672	136	-0.49	91
IV.ALJA.HHE.	2014-08-26T01:19:55.80	0.1	undecidable	manual	P	248	54.3012	110	0.26	92
IV.EPZF.HHZ.	2014-08-26T01:19:55.35	0.1	undecidable	manual	P	105	48.1185	113	0.7	82
IV.MUCR.HHE.	2014-08-26T01:19:54.61	0.1	undecidable	manual	P	76	49.3173	112	-0.22	93
IV.RESU.HHE.	2014-08-26T01:19:53.60	0.1	undecidable	manual	P	217	39.8268	118	0.11	97
IV.CAGR.HHZ.	2014-08-26T01:19:53.46	0.1	positive	manual	P	156	37.9287	119	0.22	96
IV.GALF.HHZ.	2014-08-26T01:19:52.18	0.1	undecidable	manual	P	140	32.6451	124	-0.36	93
IV.MNO.SHZ.	2014-08-26T01:19:52.34	0.1	positive	manual	P	91	32.2455	124	-0.15	97
IV.GIB.HHZ.	2014-08-26T01:19:51.93	0.1	negative	manual	P	283	26.9508	130	0.09	100
IV.MSFR.HHZ.	2014-08-26T01:19:51.36	0.1	positive	manual	P	65	25.6521	131	-0.32	95
IV.PETRA.HHZ.	2014-08-26T01:19:50.80	0.1	negative	manual	P	239	21.6672	136	-0.45	93

Station Magnitude and Amplitude

SCNL	mag	Generic_amplitude	Period	Type	Category	Unit	Time_window_reference
IV.PETRA.HHN.	ML:3.8	0.0287	0.56	AML	other	m	2014-08-26T01:19:59.44

TDMT - Time Domain Moment Tensor

Warning: the following TDMT solution has been computed starting from an event location obtained before the preferred one showned at the moment.

TDMT details

Field	Value
Magnitude	Mw 3.66
Scalar Moment	3.88407E+21 dyne-cm
Computed depth	17 km
Quality	Ba
Variance Reduction	50.62%
Double Couple	95%
CLVD	5%
ISO	0%
Model used	CIA
Mode	manual
Status	reviewed

Moment Tensor Components

Component	Value
Mrr	-2.0786E+21
Mtt	2.3554E+21
Mpp	-2.768E+20
Mrt	-3.0551E+21
Mrp	8.803E+20
Mtp	1.11E+20

Nodal Planes

Name	Strike	Dip	Rake
PN1	103	73	-80
PN2	251	20	-121

Fault Plane solution

psmeca (GMT documentation)

14.3337 37.9543 17 103 73 -80 251 20 -121 3.88407 21 14.8337 38.4543

TDMT references

More info and references

PDF Solution

Download TDMT soution in PDF format

Station Distribution

TDMT station details

Station	Epicentral Distance (km)	Epicentral Azimuth	Variance Reduction	zcor
RESU	41.9	215.6	48.18%	188
GIB	27.3	278.5	38.5%	185
PETRA	23.5	235.2	71.27%	183
MUCR	48.5	78.1	57.96%	186
NOV	70.9	83.1	27.04%	190
MSFR	24.3	68.6	61.68%	184
ALJA	55.9	246.1	26.59%	189

Fault Plane solutions in the area

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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

Earthquake with magnitude of Mw 3.7 on date 26-08-2014 and time 01:19:45 (UTC) in region 3 km W Mistretta (ME)